You should have started the app on an Android first. An Android developer license is only a one time $25 fee. Once you build it on Android, you can gauge the response and determine how much to charge on other platforms. And build it using a build once, deploy many framework, such as React Native or Flutter, that way porting it to any device would be a sinch! My piece of advice.

I remember reading years ago that people were much more likely to pay for apps (outside of games) on Apple vs Android. I wonder what the current distribution looks like.

why even have a android app? just build it on the web.

on the plus side everyone can use it on any device they would like.

"The 'mouse' pointing device is about the size of a package of cigarettes and has one button on top". God bless the 80s!

And you'd have to pop the ball out every now and then to clean the crud that had built up on the x & y rollers that otherwise made the on-screen pointer stick and skip. Good times.

And even though we're well into the future of optical mice, when my Bluetooth mouse disconnects for a few seconds, the habit of thunking it on the desk a couple times persists... (to unstick the ball)

Then there were the first-gen optical mice which required special mousepads with a grid on them for the mouse to know how it was being moved.

The project could be more useful if:

1) Make it use your computer's webcam instead of your phone for tracking.

2) Make it track your eyeballs instead of your neck.

3) Whenever you look at a window, that window because the front and center window

The Chrome web development tools are so much better than Firefox's

This is awesome! Now I'd like to see an Android version or better yet, a port to something like React-Native, so it can work on any device, iOS or Android!