Voice changer app android call jobs

I have 1 issue with socket.io-client. I developed the react-native project and tested it on Mac OS. I generated APK, but function is not working although that function is working well in Mac OS. If you have any experience, please let me know. Thanks

...number through a VoIP service using the VCDial setup I have. The code should also play a pre-recorded message when the call is connected. The operating system I am using is Windows. Key Requirements: - Develop a Python script that can interact with the VCDial setup for dialing numbers. - Integrate the functionality to play a pre-recorded message once the call connects. - Ensure the script can run smoothly on a Windows environment. Ideal Freelancer: - Proficient in Python programming, with experience in telephony and VoIP setups. - Familiar with VCDial or similar systems. - Able to work effectively on Windows OS. - Prior experience in creating automated call systems or call centers would be a plus. My budget is not more than 5000-6000 INR for this. I can ...

We have a prototype of a software application that is almost ready but only one part is missing and is that we need a function that prevents from shutting down the mobile phone. And that's what our team needs help in.

...social media content, to be shared on Instagram, TikTok, and YouTube. Key Requirements: - Create, edit and produce videos suitable for Instagram, TikTok, and YouTube - Craft content for different types of videos, specifically tutorial videos, vlogs, reels, and TikToks - Videos should be concise, engaging, and relevant to the platform they are intended for - Ability to maintain a consistent brand voice across all videos Ideal Skills and Experience: - Proven experience in creating engaging social media videos - Expertise in video editing software - Understanding of social media best practices - Familiarity with Instagram, TikTok, and YouTube's video format and style - Strong communication skills to understand and implement my vision for the videos. The ideal candidate shou...

Budget is max $350. so don't ask me. I will provide end point and key info, I have needs for 4 things - 1) E* Trade API integration (take data from them). - Easy if you know API/OAuth - 2) Text to Voice Conversion. - This is where you skills will be. 3) Emailing file.- Easy 4) Learning from me about financial lingo. = time sensitive if you can not work next 7-9 days no need to bid. I need this project to be over by 4/28/2024.

I am in need of an experienced ad campaigner to implement Google Call Ads specifically for lead generation. The focus is on age group 18-55. Key skills required: • Proficiency in Call Ads. • Experience in lead generation & • Targeting strategies for the above-stated age group. Your main responsibility will be to increase brand's visibility and generate leads, influencing prospective clients to take swift action. Your expertise in strategizing and execution will be highly impactful on this project.

I need an Android service developed that continuously captures GPS location data in the background, enabling real-time tracking. Key Deliverables: - A service that can consistently capture GPS location data in the background - even when the app is closed. - The capture precision of the location data should be within 10 meters. - This data must be updated every 5 minutes to ensure accurate real-time tracking. Skills & Experience: - Strong proficiency in developing Android services. - Prior experience with GPS location tracking in background mode. - Demonstrated ability to deliver high-precision location data.

I am looking for an experienced Android developer to help with a couple of key issues in my app. The primary focus should be on UI improvements. Key Tasks: token refresh functionality ignore battery optimize permission run at startups functionality UI change 2 new api's refactor code for easier maintenance currently displayes persistent notification dont want it Other requirements: - The app's token refresh mechanism must be revised and optimized - You should be able to ignore battery optimization permission I would ideally like a freelancer who is experienced with Java, Android Studio and UI/UX principles. Experience with token refresh mechanisms and battery optimization is also highly desirable. Please provide examples of previous relevant work.

I'm seeking a professional app designer to create a sleek and user-friendly login interface for an Android app. Below are the key requirements: - **Platform**: The design should be specifically for Android devices. Prior experience in Android app design is a must. - **Authentication**: The login system should be simple, without the need for multi-factor authentication. - **Integration**: While the design should be self-sufficient, it should not rely on any third-party authentication systems. This is a standalone login system. Ideal candidates will have proven experience in Android app design, specifically focusing on login interfaces. Strong candidates will also have a portfolio of relevant work and a good understanding of use...

I'm seeking a professional app designer to create a sleek and user-friendly login interface for an Android app. Below are the key requirements: - **Platform**: The design should be specifically for Android devices. Prior experience in Android app design is a must. - **Authentication**: The login system should be simple, without the need for multi-factor authentication. - **Integration**: While the design should be self-sufficient, it should not rely on any third-party authentication systems. This is a standalone login system. Ideal candidates will have proven experience in Android app design, specifically focusing on login interfaces. Strong candidates will also have a portfolio of relevant work and a good understanding of use...

DESIGN ME AN A5 FLYER - USE TEMPLATE ATTACHED AND OUR LOGO COLOUR SCHEME- TEAL COLOUR GRAPHICS- PHARMACY BASED FLYER DETAILS BELOW:- Penhill Pharmacy 257A PENHILL DRIVE, SWINDON, SN2 5HN Opening hours: Monday-Friday ( 08:30 - 17:30 ) T: 01793 723 534 E: info AT W: How to order your repeat ...COLOUR GRAPHICS- PHARMACY BASED FLYER DETAILS BELOW:- Penhill Pharmacy 257A PENHILL DRIVE, SWINDON, SN2 5HN Opening hours: Monday-Friday ( 08:30 - 17:30 ) T: 01793 723 534 E: info AT W: How to order your repeat prescription at Penhill Pharmacy 1. Hand in your repeat slip at the pharmacy 2. Request medication via the NHS APP 3. Email us at info AT 4. Call us on 01793 723 534

I am looking to fill a longterm editor position for multiple projects for my agency. I am running a short-format content agency that edits videos for various coaches, businesses and podcasts. *The videos are up-to 60 seconds long and I expect you to edit subtitles, b-roll, stock fo...fullscreen experiences on IG Reels + TikTok.* *Please reach out to me here on “Freelancer ” and tell me a bit about yourself, your current situation and show me previous work.* ***Important***: *I expect a sample to quality check your work, if I find qualified for the position, I will provide you with the raw 60-seconds footage.* *Fluent English is a must + you must be able to jump on a Zoom call to go through the onboarding process(webcam is a must).* *Daily reports are expected whenev...

I want to activate android auto in my BMW 2019 without adding devices.. (something like below reference) reference:

My SIP Trunking system is constantly preventing me from receiving inbound calls. It's a constant issue that requires urgent attention. Ideal candidates will possess: - Extensive experience with SIP Trunking - Knowledge in diagnosing and resolving call reception problems - Proficiency in troubleshooting technical issues constantly, not sporadically.

...Integrated Google Map Location: The website should integrate Google Maps for location. - Gallery & Photos: Users should be able to view high-quality images of the project. - Video, 3D Tour: Incorporate video and 3D tour to enhance the user experience. User Experience for Lead Generation: - Contact Form Submission: Users should be able to submit inquiries through a contact form. - Direct Email or Call Option: Provide means for users to directly contact us via email or phone. - Schedule a Visit or Appointment Feature: Allow users to schedule visits or appointments. - Button for Download PDF Brochure: Include a downloadable PDF brochure about the project. Skills and Experience: - Proficiency in website development, particularly for real estate. - Experience in implementing int...

The goal of this project is to gain some prac3cal experience in Android development and exercise your understanding of cellular and WiFi networks by measuring them. Our specific learning objectives include: • Getting familiar with the Android programming framework. • Implementing background services for Android. • Implementing network measurements using the Telephony and the Wifi Manager Android Apis. • Practicing technical code documentation. • Practicing teamwork.

I'm in need of an expert Mobile App developer to create an Android application for me. This app is primarily designed to scan nearby wifi networks and cellular networks using latitudes and longitudes. Key Features Required: - The central functionality should involve scanning networks. The app should be able to detect the presence of networks in a geographical location based on coordinates. User Interface: - I prefer a minimalistic approach to the user interface. Please ensure it's straightforward, clean, and efficient. Relevant Skills: - Android app development - Familiarity with network scanning technologies - Experience developing minimalistic user interfaces Please reach out if you have a good understanding of these requirements ...

As a growing business, we're seeking an experienced Swedish native who can provide phone support for our Customer Service department. The success...Possess strong understanding and knowledge in resolving customer issues promptly and pleasantly. Your primary responsibility would be to answer customer inquiries, resolve their issues, and provide a positive customer experience. Essential Skills: - Fluent in Swedish (native level) - Excellent communication and problem-solving skills - Previous experience in a customer service role, preferably in a call center environment. This role offers a fantastic opportunity to get involved in the early stages of our customer service expansion. If you're a patient, versatile professional with a focus on customer satisfaction, we wou...

...female freelancer to create a non-fiction audiobook of approximately 3 hours in length (33,000 words), intended for an adult audience. The book is about my journey to healing from cancer (see attached book cover). I need someone that can deliver with soft authority in an upbeat, but empathetic tone and convey a message to the reader of HOPE with a positive 'you can do this attitude' behind your voice. Your role will involve: - Producing a clear, engaging audio narration of the book. - Assisting in promoting the audiobook to reach an optimum audience. (If you are a vocalist, but not a promoter or vice versa I may decide to split this into two roles, as needed.) Requirements: - Proven experience in audiobook narration, particularly in the non-fiction genre. - Sound edi...

We have an existing app with a menu that needs some attention. Right now, the focus is on changing existing menu item or a adding new one. While we want these changes to happen relatively soon, they aren't necessarily urgent and should be achievable without disrupting the overall flow of the app. - The interactions with the menu are also up for reconsideration. We're open to a different approach than the traditional menu. Maybe something more interactive like a roller, or a more user-friendly system than a standard dropdown. Right now we have 26 cities that have to be included The backend CMS work both for android and iOS Ideal skills for this project include: - App design experience, particularly with menu systems - A good understanding of use...

We're on the hunt for an ...that's engaging and relevant. Skills and Experience Required: • Proven experience in writing high-quality website content for young adults. • A deep understanding of educational topics and the ability to convey them in an exciting and approachable manner. • Strong knowledge of SEO principles to boost our site visibility. • Excellent writing skills with attention to details, grammar, tone and voice. • Familiarity with brand building through website copy The ideal candidate will have an engaging writing style, be able to work within given deadlines, and produce well-researched, engaging content. Your goal will be to create website copy that’s not only educational, but also persuasive and compelling, conveying ...

...* Increase my sales and generate more leads, Covert Ideal Candidate:has substantial experience with SaaS website marketing. Our website services are primarily targeted at lawyers and chambers that need a video call consultation appointment system, also known as telelegal and on-demand telelegal services, for individuals seeking legal advice and small businesses needing legal assistance. Hence, an understanding of how to design these features to cater to this specific audience would be beneficial.   Our website services are primarily targeted at Lawyers, Chambers who needs Video call Consultancy Appointment System which is Known as Telelegal and On-demand Telelegal Service for individuals seeking legal advice and small businesses needing legal assistance. Hence, an u...

...looking for a competent mobile app developer to create an Android Internet Radio app that features a mix of content, including talk shows, music, and news and sports. This is what I require: - Development of the app solely for the Android platform - It would be a bonus if the app can support offline listening, but this is not a definitive requirement – I am open to discussion on this point. I provide access to my play store for the person to deploy the app. I will also submit the online radio link Ideal skills and experience: - Proven experience in mobile app development, especially in creating high-quality Android applications - Strong knowledge and experience with internet radio app creation would be hig...

...targeted Facebook Pay Per Call campaign. Specifically, I want someone who can reach Spanish-speaking individuals and drive them to call our service for debt settlement. Key Requirements: - Experience: I need someone who has a proven track record in Pay Per Call campaigns, preferably in the financial or debt settlement sector. Proficiency in running campaigns with a bilingual focus would be a strong advantage. - Language: Fluency in Spanish is a must. The ability to convey complex financial information effectively in Spanish is critical. - Strategy: The ideal candidate should be able to customize ad content and targeting to resonate with our specific audience, encouraging them to take the desired action of making a phone call. - Tracking: While I prefer Faceb...

I'm in need of an IT specialist, specifically expert in the field. Th... Request to install the programme from GitHUB: Seamless is a family of artificial intelligence models that enable more natural and authentic communication across languages. SeamlessM4T is a massive, multilingual, multimodal machine translation model supporting around 100 languages. SeamlessM4T forms the basis of SeamlessExpressive, a model that preserves elements of prosody and voice style across languages, and SeamlessStreaming, a model that supports simultaneous translation and streaming ASR for around 100 languages. SeamlessExpressive and SeamlessStreaming have been combined into Seamless, a unified model that includes multilingual, real-time expressive translation. You are welcome to send us an offer.

I am looking for an experienced Android developer to help with a couple of key issues in my app. The primary focus should be on UI improvements. Key Tasks: token refresh functionality ignore battery optimize permission run at startups functionality UI change 2 new api's refactor code for easier maintenance currently displayes persistent notification dont want it Other requirements: - The app's token refresh mechanism must be revised and optimized - You should be able to ignore battery optimization permission I would ideally like a freelancer who is experienced with Java, Android Studio and UI/UX principles. Experience with token refresh mechanisms and battery optimization is also highly desirable. Please provide examples of previous relevant work.

...the Flutter framework, experienced in solving similar issues, and familiar with both Android and iOS development. • Build Errors: My project has been spawning various build errors that hinder the execution of the application. The freelancer is expected to help identify and rectify these errors. • UI Layout Problems: There are also vital concerns with the user interface layout. Some pages don't render correctly on different screen sizes, and the general responsiveness of the UI is inconsistent. The task would involve pinpointing these problems and implementing effective solutions. • Platform: The application is to be developed for both Android and iOS platforms. Therefore, experience with cross-platform app development will provide a definite ...

...and Instagram. Your role involves creating rich content that resonates with our audience, increases our followers and boosts engagement levels. • Posting Frequency: Posts should be made three times a week. You will need to schedule these posts for optimal engagement. • Content Creation: I require original content created. You should be adept at crafting engaging posts that align with our brand voice and ethos. Proficiency in using various social media tools for graphics and video creation is a plus. This role requires someone who can strategize, plan, and execute compelling content while tracking performance. If you have a knack for understanding what makes social media users tick, this is your job....

...only informative but also engaging and accessible to a broad audience. Ideal Skills and Experience: - Proven experience in non-fiction writing, with a particular focus in health-related topics - A deep understanding of nutrition, fitness, and mental health, and the ability to convey this knowledge in an engaging and digestible manner - Excellent ghostwriting skills, with the ability to adopt a 'voice' most suited to the project - Strong research abilities, especially in regards to health-related topics - Previous experience writing for radio would be a bonus, but not mandatory This project is ideally suited to a writer who not only has a passion for health but also a talent for creating engaging and accessible non-fiction content. I'm looking for a writer who can...

I'm in search of a talented app developer to create a service, mirroring the key features of the 'Zello' app, for both iOS and Android platforms. I want to launch a similar app that rivals Zello in its impressive capabilities. Main Features: - Push-to-Talk (PTT) Voice Messaging - Location Sharing - Status and Availability Information - Chat Share Image Location Ideal Skills: - Solid experience in cross-platform app development - Ability to replicate Zello's key features - Expertise in PTT Voice Messaging technology - High-level competency in integrating location-sharing features I am planning to complete this project within a month. It would be greatly appreciated if the interested candidates can demonstrate a strong ...

JOB PORTAL BUILD 1) I am building an online job search portal. I just purchased a stock Laravel job board software package and installed it on my VPS. The unfinished site is When built out it will have similar features to these 2 competitor sites- or htt...with meeting times. Starting out I would pay by the hour and we would complete tasks together using Teamviewer. You would need to be available for calls between 7 am-11 am cebu city philippine time. Application Directions: 1) Confirm you are available for teamviewer calls between 7 am-11 am cebu city philippine time. 2) Confirm you have a fast and stable internet connection for teamviewer and voice calls 3) Tell me why you are a good fit and similar Laravel projects you have done

I'm in need of a skilled mobile app designer who can redesign an existing android app and also make for IOS. there will be two versions (android / Ios) EDITED: this project is not only to change the color or the images to the current app. you need to know about programation in arduino, bluetooth and android ,, because this app will manage a lock using the smartphone. I send you the current android app in order that you could understand and know how the buttons work please do not offer your job if you can not open the current job and see how it works Key Requirements: - The design modifications primarily focus on be friendly and easy to use - For the user interface, I'm looking to make changes to the color sche...

I am in need of a professional Android developer to create a live streaming app with the three key features of live chat, virtual gifts, and social media integration. Key Features: - Live Chat: The app should allow users to chat in real-time with streamers. - Virtual Gifts: Users should be able to gift virtual items to their favorite streamers during live broadcasts. - Social Media Integration: The app should seamlessly integrate with popular social media platforms, allowing users to share their favorite streams. Ideal Skills: - Proficient in Android app development - Experience with live streaming technologies - Familiarity with in-app chat and gift systems - Previous work involving social media integration

I'm in need of an Android developer who has high skills in the following areas: Im can suggust good budget This project is very complex Only high skills android Developer can take a part - Granting Permissions: I need someone who can work with me to set up secure and efficient permission management for the app. - Google Play Implementation: The developer should be able to implement Google Play services effectively to ensure a smooth and seamless experience for users. The project is complex, demanding someone with a deep understanding of Android development and a track record of working on similar projects. Key Responsibilities: - Manage device permissions effectively and securely - Implement Google Play services in a way that enhances user interaction...

I'm seeking a talented writer for a long-term project in writing high-quality, engaging articles. These will be published on our governing body website, focusing on the sports sector and distributed to our membership. Key requirements: - The ideal candidate must be able to produce 12 articles per month. - Each article should ...month. - Each article should be between 500-1000 words. - The tone of the articles is expected to be professional. Ideal skills and experience: - Proven track record in sports writing. - Ability to adhere to a professional tone. - Experience in generating high-quality, engaging content. Your tasks will involve creating informative, engaging content aligned with our governing body's voice and mission. Please include relevant sampl...

I'm seeking an experienced developer from VIETNAM who can proficiently use CodeIgniter 2 framework and Microsoft Graph API for my project. I need someone who has worked with the MS Graph API to collect all items availible from teams (with call register)

...experience for visitors. Responsive Design: The website should be fully responsive and optimized for all devices (desktops, tablets, and smartphones). High-Quality Visuals: The use of high-quality property photos and visuals is essential to showcase properties in the best light. Branding Consistency: The design should be consistent with our brand identity, including our logo, colors, and fonts. Call to Action (CTA): Clear CTAs should be incorporated throughout the website to encourage users to contact us, schedule viewings, or learn more about our services. Project Timeline We are open to discussing a flexible project timeline, but ideally, we would like the project to be completed within 2 to 3 days. Budget Our budget for this project is $100. Selection Criteria We will be...

I'm seeking a talented female voice artist with an American accent for an exciting English recording project. You'll be tasked with recording voiceovers for various scripts to be used in TikTok videos. The voiceovers should be 1-5 minutes in duration, maintaining a friendly and conversational tone throughout. Requirements: - Talented female voice artist with an American accent - Proven experience in voiceover work - Ability to effectively convey a friendly and conversational tone - Ideally, some experience or understanding of TikTok content The ideal candidate for this project will be able to bring scripts to life with an engaging and relatable voice, appealing to the TikTok audience. Your recording should be high-quality and professional, ensuring the cont...

I'm in need of a skilled 3D animator to create a captivating and entertaining animation video. The primary purpose of t...animation video. The primary purpose of this video is for entertainment, so I'm looking for someone who can bring in creativity and artistic flair to their animation. Key requirements: - Proficient in 3D animation. - Experience in creating engaging and entertaining content. - Ability to work without the need for voice-over, relying solely on visual storytelling. Your task will be to create a visually appealing and captivating 3D animation that can engage the audience without the need for voice-over. The ideal candidate will have a strong portfolio of similar work and can demonstrate their ability to bring characters and scenes to life in an ent...

...to create a robust CodeIgniter module that integrates with multiple APIs. The main purpose of this module is to enable seamless communication with various services including calling contact, Google Meet, SMS, and Email. Key Details: - The module should include a custom API integration for calls, Google Meet, SMS, and Email. - For contact calls, the primary functionality required is a 'Click to call' API. This should allow users to conveniently initiate calls directly from within the system. Skills and expertise that are required for this job include: - Proficiency in CodeIgniter and understanding of MVC framework. - Prior experience in integrating APIs, preferably for contact calls, Google Meet, SMS, and Email. - A solid grasp of web development and ability to creat...

I'm urgently looking for a skilled professional who understands the ins and outs of Android system and can root my device. I wish to install a custom ROM, specifically, a customised name ROM. If you are efficient in rooting Android devices and have previous experience with ROM installation, this job is for you. Please illustrate your skills and experience when bidding. Skills Needed: * Knowledge and experience in rooting Android devices. * Understanding of custom ROMs installation. * Familiarity with customised name ROM will be a plus. * Ability to start immediately and work quickly. Quick completion is my priority as I need this done ASAP. Enjoy a straightforward task with a sense of urgency. Let's discuss further details!

...topics given here in the attachment. It can be discussed in Chat. You should have a good, professional grade Mic. An electronic Pen is desirable. Topics for which you need to create the videos are Narration , voice change, parts of speech, sequence of tense, gerund, creating wh questions etc. Each topic should be minimum of 60 minutes length. You first need to explain the main concept, use examples and use some questions and then its answers with explanation.. also create 10 MCQ questions on each topic. Instructions to be in ENGLISH only. Use Screen recording Software and/or Whiteboard. VOICE MUST BE LOUD & CLEAR. NO BACKGROUND NOISE/SHAKY VIDEOS NOT ALLOWED. See my attached sample video. You need to give me the full copyright of all the videos. Lowest Bidder will win ...

...an experienced IOS app developer to create an app similar to AliExpress. The app will be a platform where sellers can showcase their products, and customers can purchase them using various payment methods. Key Features: - Development of an Android app with a user-friendly and intuitive interface - Functionality for sellers to create product listings - Integration of multiple payment gateways including Credit/Debit Cards, PayPal, and Mobile Wallets - Secure and reliable payment processing for customers - Ability for customers to browse, search, and purchase products - Notification system for order status updates - Shopping cart and checkout functionality Ideal Skills and Experience: - Proven experience in developing Android applications - Stron...

I'm looking for a talented mobile app developer to create a comprehensive family tree mobile application. The app should be available on both iOS and Android platforms. The primary goal of the app is to enhance family communication and organization, so it will feature several key functionalities, including: - User registration and login - Family tree visualization - Photo upload and tagging - Entering details for individuals by Admin or other users with approval from Admin - Family News - Family Calendar - Admin Notifications and user notifications - Family Board data with accomplishments The app should have an intuitive and user-friendly interface, making it easy for all family members to interact with. Experience in developing similar applicati...

I'm looking for a native American English speaker who can help me out with a project I'm working on. - **Type of Work**: This would involve a Zoom call, where you would be required to conduct an interview. - **Purpose of the Call**: The call will be recorded for the purpose of an audio project, so your role would essentially be that of an interviewer. Ideal Skills: - **Native American English Speaker**: This is essential for the project, as we're looking for an authentic voice. Data type: long audio conversation Data format: 48k 16bit two single sides + mixed (at least 32K) Content: You need to communicate around the 6 topics given, 25 minutes for each topic Male to female ratio requirement: one to one (adults over 18 years old) Number of p...

I need someone to gather a list of companies and individuals who offer cleaning services for the Bath, UK area. I need; Price per clean, name, email, telephone. This is for a 1 bedroom house. Dates will be random across the year and would need a cleaner with no contract, just a cleaner to call when needed. Need a list making of cleaners and prices for Airbnb turnover clean at Bath, UK.

We are looking for Indian Male Voice Over Artist. apply with your ads voice sample. bid without sample will not be considered. and please let me know your charges for 15-30 Sec

...balanced she is now." - A grateful father) - Design should convey calmness and health, using colors like soft green and earth tones. **Additional Requirements:** - Each sheet should have a clean, focused layout with plenty of white space and a clear structure that highlights the different elements. - The files should provide space for later addition of own pictures and be easy to adjust. - A visual call-to-action should be subtly integrated into each design. **Deliverables:** - PSD or PPT files for each sheet - A brief description of the design concept...

I am seeking a highly skilled designer with expertise in Android app development to design a casino app for me. Your main task will be to design a visually appealing and user-friendly casino app for Android devices, with a focus on the unique feature of Avator, which will be included. Key Responsibilities: - Designing a visually appealing and user-friendly casino app for Android devices - Implementing the unique feature of Avator into the app - Ensuring the app is compatible with Android platforms - Providing ongoing support and updates as required

I require a specialist to integrate Phonepay SDK into my Android application to facilitate in-app purchases. This demands a comprehensive understanding of the Phonepay SDK, as well as expertise in Android app development. Here's what I need: - Integration of Phonepay SDK into my Android app for secure and seamless in-app purchases. - Guaranteed functionality after integration, with purchasers having a smooth, error-free experience. Ideal Skills and Experience for the Job: - Experience with Phonepay SDK - Proficient in Android app development - Knowledgeable in integrating payment gateways - Proven record in similar projects. The ultimate goal is to deliver a user-friendly application capable of safe and efficient in...