i think it would be more useful if these options will be in the next update
1.Progress wheel in gif
2.RATE US on google store BUTTON
3.INTERNET CONNECTION REQUIRED (not error HTML)
4.another ad company beside ADMOB
5.Inactivity reminder (like a push notification but more simple, the application send to user a specific msg after ex:2 days of inactivity)
6.Menu UPDATE (about-exit-share-RATE-REFRESH-LINK TO FB/WEBSITE/TWITTER/YOUTUBE/INSTAGRAM) in top fixed mode not hidden or a slide panel which would be much better.