Frank,
I like the fact that you added note letters at both ends of the app. The video was however difficult to watch since I presume you used your cell phone to video it holding it in the traditional vertical position. When I watched it everything was sideways. I had to tilt my head. That was a pain in the neck! It looks like you are designing the app to use traditional musical score. I have more to say on that matter... I use a sophisticated MIDI music sequencer created by Cakewalk. It's called Sonar X3 - Producer edition. It's on par with Pro Tools except that it's much cheaper to purchase. It only runs on Windows platforms - no apple or android. I've created a lot of computer compositions with the application going all the way back to the 1990s. (As you wisely pointed out, it's important to take some breaks from CF work.) FWIW, I never compose music on my PC using traditional musical score notation. I tried to use traditional musical notation at first, but found it to be extremely limiting since you need to be able to place some notes out-of-sequence in order to generate a more human touch to one's music. This is especially the case if one is improvising or playing jazz. I don't know anybody who uses traditional musical notation when composing on a PC monitor screen. This is especially the case if one is using MIDI. With a piano role configuration you can still add note letters at both ends. You can also grey the horizontal "black" minor keys bands. The major horizontal bands can remain white. This is useful to help distinguish the horizontal minor and major notes from each other on the monitor screen. When composing I use three HD monitor screens, and yet, I still don't have enuf desktop space. I'm considering getting a ultra-high 4K monitor. That would be the equivalent of 4 HD monitors. 4K HD monitor prices are gradually coming down. I cannot imagine myself composing or playing music on an iPad or Android device. NTL, I know there are younger tykes who do just that. Guess I'm too much of an old fart at 63 years old. I need glasses too. Regards, Steven Vincent Johnson OrionWorks.com zazzle.com/orionworks