The basic concept is good Pomodoro+Trello, but the execution leaves a LOT to be desired.

These are just a few of the things that are making me look elsewhere. (I have a Mac)
1. There is no where to redeem your code. You have to download the mobile app and enter your code there and even then it does not remember it, nor does it look like any extra features appear.
2. Once you add your items on the Kanban board, you can't even REORDER them. This is VERY basic functionality, why is it not there.
3.Most buttons are SUPER laggy on the mobile app.
4. You can't chose your own alarm sounds.
5. The form inside the app makes you fill out all this stuff, but then when you go to send it, it makes you open your default mailing app to send.

I don't use a mailing app, just give me your address, it's double handling.

Basically, most things need a lot of improvement. It looks like the app hasn't been updated in the app store for about 2 years, so that should tell you everything you need to know.