Hey, I've just released my first Windows Store app. It's called Sticky List and it's pretty simple to be honest(I am currently studying CS at University).
I'm looking for some user impression and i would also like some ideas on what features to implement next.

It is a simple, free To-do list. Currently I have like 50 downloads/day.
When I finish/add more features to my app do you think anybody would actually spend $1.5 for it? or should I just let it free? Did anybody actually make any $ from ads on Windows Store.

Any feedback is very useful for me. Thanks.

App link: Sticky List app for Windows in the Windows Store