First, let me say that I have used and loved this app for years. For me, it is perfect for initial sketches and quick illustrations. The interface is mostly convenient. I have a few suggestions for improvement, the first of which is to just fix the bugs! If my iPad screen locks, or I switch apps for even a second, I keep coming back the the app’s loading screen, where it shows the thumbnails of sketches, and often loses everything I was previously working on. This is honestly frustrating, and my app and iOS are all up to date. Aside from this, I would love the option to view sketches in book format, with the option to swipe to the next/previous pages. Often when I’m sharing sketches, I want to show how my idea progressed, and that feels clumsy each time I need to zoom out and zoom into something else. Lastly, I would love to see more gestures (and better palm rejection! This is the only app that gives me problems!), such as one that could hide and show the interface/tools. I think these could really take the app to the next level, make it more convenient to use, and turn it into a true digital sketchbook (something I’ve been looking for!).