Adding 20 features to a existing music player app, making it bug and crash free

Please download our app from google play and check from your side. We to add these 18 features. 1. Give animation for next and previous gesture command in the song playing window as per material design 2. Optimization of pop-ups in terms of speed. Increase blur value of pop-ups and optimize the time of blurring. In some popups, also consider the upper portion of the phone while bit mapping to blur it. But it does not do that. () 3. Change the color of the text of songs which is playing and give any symbol 4. The long press should work everywhere (genre, artist, and album pages 5. Inside playlist give the option to add songs to playlist 6. Giving fading effect when songs are scrolled and for next and previous command in the song playing window 7. Music should play even if we remove the app from recent app 8. When clicking on the Shuffle in landing page then it should not direct to the song playing window. Instead, song will start playing in the top section of the app and it must save the state of icon until the user changes 9. Widget for music player 10. In landing page, remove share icon(feature) and replace it with next command 11. FAQ in setting page 12. Rate the app in the setting page 13. Add more extensions like m4a, wav, etc. 14. App should retain the state of last played songs, sorting, shuffling, repeats, equalizer (on-off only. Do not temper with auto syncing feature) and fitter short clips (but not sleep timer) 15. Genre miscellaneous is empty now. It should not be. 16. Search should go up to make contents visible. 17. The background image is not coming in android 6 in the lock screen 18. Give the option to choose a customized photo for background theme and could be little changes in design. Buttons should be more sensitive. 19. Ringtone cutter. 20 Making song playing window compatible in all size phone screens. Note: App should be completely bug-free and must be compatible on all android devices from 4.4. We have implemented Fabric in the app and all the Fabric crashes should also be fixed. You also may need to fix few stray bugs in the development phase.