Suggestions are always welcome.
My friend is also working on an Android version, though it doesn't have feature parity (yet).
Shows there is a need for paid Apps!
Great app btw and congratulations on last year's success :)
But well, there is the virtual planner feature that makes heavy use of carefully tuned iOS gesture recognizers for zooming, panning, dragging, tapping and holding, all in combination for a smooth and useable editor on a small screen.
Not that I have actually tried, but I suspect I would have to lay more groundwork to implement the same experience with the browser DOM. This could of course just be a lack of knowledge on my part, but my time is finite :)
I like my apps to be apps and a lot of the "Apps" that are HTML/js are janky cross platform and are tricky to pay for (vs one touch on ioS)
Fingers crossed for the future of your friend's work.
Most notably though, it doesn't have the virtual planner yet.