Thankyou for considering the Pro version of Tablet Drums. The Pro Version has many many Premium Features:-Fully functional sequencer-No Time restriction-Unlimited Drums-Unlimited Projects to save and load your favourite configurations and songs.-Load custom Sounds from your SD-card-Export a fully uncompressed .wav file of your recordings-No Advertising!For best results (Low Delay) use android 4.1 or newerIf you have any ideas for improvements of encounter any bugs please contact me via email.