I have over 6 years experiences in developing iPhone / Android applications and have more than 30 applications published on Apple App Store and Google Play Store.
My favorite applications are the followings.
1. Photo & Video sharing applications with Instagram effects and Photo College templates.
2. Various kinds of Social networking services like Vine, Facebook, Tinder and Youtube.
3. Clouding system like Dropbox and Box.net.
4. Popular online ...