About a month ago I started learning Android development (long time web developer). The first thing I wanted to make was a todo app that approached things in my own way which is a bit different from what's out there already. Basically, focus on time (specifically right now, this next hour for example) rather than a bunch of lists, categories, tags, future future planning, etc.
I still have a few more things I want to add but I think it works well now and I'm looking for some alpha testers. You can search for 'do.now' in play store or If you'd like an invite please PM your email and I'll add you to the G+ tester group so you can access the test releases in the play store or search for "do.now" community.