* First thing I did was export a PDF to see the engraving. Some quirks around that: - No title or composer showed up. - Measures of 8th notes in V2 were beamed all together rather than broken up. Kind of awkward looking. - I had four staves, all with treble clef, even though I'd kept the default piano layout with bass & treble.
* When adjusting an existing note's pitch, it would be nice to get the targeting lines that you get when adding a new note. Also, consider adding a zoom reticle off to the side of the finger location, please! :)
* I love the d-pad; what a great approach. I love the UI. I love the drag-area eraser. Great work. The UI is very concise, discoverable, and intuitive. I loved the text tool, and wish it could follow notes so I could do lyrics. I don't love that there was no obviously discoverable way to delete or add bars, though like i said it was only a brief run-through and i may have missed it.
* I wish there was a two hand mode when in landscape with the keyboard running vertically along the right edge so I could do rapid input with my left thumb choosing note lengths & the like and my right inputting the pitches.
* I also wish I could jump to a location in the score with a tap in the slider at the top instead of having to drag the handle. If it's possible, the hit targets may need adjustment.
These initial, few issues aside, I would /already/ use this app nearly full-time in a heartbeat if it had lyrics support. I'm sure you'll get a thousand feature requests! I always had a sneaking suspicion that editing sheet music on the iPad would be fantastic, and in the few minutes I used this app the incredible tactile connection to the music was already established. This far exceeds a MVP release, and was already worth my money. I can't wait to see where you take it next. Congrats!