Adapt an existing app for iOS and Android to the OneSignal messaging API

Hi, dear. I have a full experience of JNI, FFmpeg. I have been developed apps for 6+ years. I can develop android and iphone apps. Android: Shopping app, OpenVPN, Chatting app, Photo Sharing Social app, Bus Tracking app, Live Streaming App, News app, Youtube Channel app, ChromeCasting app... IPhone: News app, Location Share Chatting app, Youtube Channel, ChromeCast app... If interested, please ping me. Regards.

Hi there - My name is Mansoor Shaikh. I’ve read your brief and can see that you’d like to build an mobile app. My team has 3 years experience designing and developing mobile apps for iPhone and Android. I would approach your project by starting with wireframes and getting the design completed, before starting the actual development phase. I have highly qualified team for this project and would love to speak with you further about taking this project on. If you'd like to view my previous work, take a look at my Freelancer Portfolio. Please allow us to work on this app. Please get in touch so we can discuss the project details. Please add me to your Skype so we can discuss more details. My Skype id is mansoorshaikh2010 Looking forward from your end. BR, Mansoor