Hi Deepak. We just did some updates for the Android app and this option is now available. We have not completed this update for the IOS app yet.
However, his lessons are still available on the IOS app. If you go to the 'newest' section, and scroll down you will find his lessons. It starts with "Tuning And Playing Notes". Apologies for any inconvience. We are hoping to get the update for IOS soon!
If you have any questions, comments, or concerns, please contact us