Speaking of Android, after looking through the available apps I decided to release my own as open source. It's lightweight and has a focus on usability, check it out :)
https://play.google.com/store/apps/details?id=co.adrianblan....
https://play.google.com/store/apps/details?id=co.adrianblan....
I would argue that every app I used had minor issues which evolved into major issues over time. Poor visual design, visibility and readabilty, too cluttered or unintuitive, etc. I set out for the app to do one thing, and excel at it without issues.