Greetings!
Sure, can assist you in developing app that will store data to 'Web SQL' using angular forms then sync it after every 3 mins when internet is available as per your requirements.
Relevant Skills and Experience
Excellent ability in web and mobile app development.
Skilled in HTML5, CSS3, JavaScript, Java, Angular.js and MySQL.
Well versed with continuous sync, form validation and DB integration.
Proposed Milestones
₹9111 INR - Tentative cost
Can you please share the source code ?