I tried the Android app sometime ago and I thought it was confusing and not very helpful. Trying the free giveaway now.
Cons:
-Still confusing, had to Google where to find the download for the Windows program. Can not find out how to set a timed notification, their help page doesn't help and the pictures there are missing.

-Price, $100?? A year! Every year! Not gonna happen! Habitica is one of the most expensive To-do apps/ video game and it's $5.00 a month, anything more it's just greedy.

Pros:
-Linux and Windows versions :) Android too if you're a Phone Zombie
-None of that "Team collab sinc synergy, put your private to-do stuff here for all to see" BS
In conclusion, kinda like it but the price kills the like.