Track how many times you can play from one chord to the next in a minute and try and beat your score. In my teaching experience when you get to about 20-30 chords per minute your a chord master. :) Make sure your chords sound clear and you are moving between the chords with simple finger movements. Please feel free to leave a review. If you have a problems or ideas please contact me at the SUPPORT URL and I'll fix and add them ASAP. Have fun and keep strumming. If you have any problems please email me at firstname.lastname@example.org I've built the app for iOS 8.0 and up so if your having issues you might need to update your device.