Nice work! I especially like how you introduce the functionality with a couple default tasks.
Criticism/suggestions:
* It feels like I should be able to touch a task to select it (to show history?)
* I'd rather not be required to enter a note
* Redo-ing a habit still shows all the old notes (and crashed the app once)
* Swiping left to hide the redo/stats causes the delete button to briefly flash in a clunky way