Is there a plan to add this for linux / windows? Either way, super cool project
1. Since you're targeting blind users, you may want to use a bit more ARIA on your page, particularly around the popup menu.
2. It would be nice if the main page explicitly stated that this was for IOS. I'm an Android user and had to explicitly click through to figure out it wasn't for me. IOS certainly has a larger share of blind users, but Android is popular as well.
Good luck! Any plans for an Android version? If so, and you'd like a tester who is also a developer familiar with its accessibility framework, please do let me know.