Piano Keys App

We're looking to build a proof-of-concept piano app, this can be done as:

(1) iPhone-only app or,

(2) iPad-only app or,

(3) Universal app

Please indicate in your bid which of the option you will build this app for.

You're not required to do any artworks, we will provide some graphic placeholders so that features and functionalities can be created and tested.

There are a total of 7 piano keys: C, D, E, F, G, A, B

3 of the keys will be offered as In-App purchases, which are built-in non-consumables. You're required to guide us through the process of setting these up.

Piano sounds must be played realistically, i.e. subsequent stroke of the same key will overwrite previous stroke, while multiple strokes of different keys will be played simultaneously.

There is only one screen view, all seven keys are displayed but last three keys (G, A, B) are grayed out until purchased via IAP.

There is a also "duration" button placed on top of the screen, which are initially in gray color, and will change color (to Green, Amble or Red) depends on the duration of the last key stroke.

For example, when C key is pressed and released within 0.5 second, the button will change into green; If pressed and released between 0.5 and 1.0 second - Amble; And over 1.0 second - Red.

Budget is around USD$100.

Skills: Cocoa, iPad, iPhone, Mobile App Development, Objective C

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About the Employer:
( 8 reviews ) Auckland, Singapore

Project ID: #1117588

Awarded to:


1) piano design 2) In app purchase implementation.

$50 USD in 15 days
(6 Reviews)

10 freelancers are bidding on average $295 for this job


Check your PM.

$300 USD in 3 days
(62 Reviews)

Hi, we are very experts in doing ios technology [url removed, login to view] are done lots of sound and graphics integration applications,we are looking forwarded to work with you.

$250 USD in 3 days
(3 Reviews)

dear sir,pls see the pmb. thanks

$450 USD in 7 days
(0 Reviews)

hi,kindly check the pm for details.

$400 USD in 10 days
(0 Reviews)

hi ! i am experience corporate iPhone Developer . i have worked so many apps and gaming projects . and also i have delivered related musics like Ring tone maker , sound recording . different sound playing etc i More

$250 USD in 5 days
(0 Reviews)

Certainty is what we guarantee

$100 USD in 20 days
(0 Reviews)

please contact with me!

$250 USD in 7 days
(0 Reviews)

Hi, There, we fully understand your requirement and can susseccfully finish your project. We have also checked viber and we can able to get taht layout. About us I am writing some info We are offshore company More

$300 USD in 8 days
(0 Reviews)

Hi, We can create a Universal App which will support both the platform.

$600 USD in 10 days
(0 Reviews)