Create user-friendly interactive fitness app

MY MAXIMUM PRICE IS 900 USD, DON'T BID IF YOU ARE GONNA ASK FOR MORE. THANKS. Create a simple fitness app (the videos are ready with subtitles) containing: terms of privacy, which is also the only part done (written with collecting members data); mini videos per exercise and random series of these (with premium/ad-free version in which you can customize your own series); alerts/ reminders/ motivation; optional standard music or synched with soundcloud (continuous on paid version); calories counter and other features for paid version, such as IBM; post to social media feature; FB login and Instagram login feature; connection with our website's community- Buddy press installed; Compatible with iOS, Windows Phone, Android. Maybe win8 wouldn't be fundamental, but desired only if in the price package. MY MAXIMUM PRICE IS 900 USD