I've just completed an Android app on previous weekend. It's hard to find a good solid block of time to get a project done. I found it hard to even start, fearing it would be started and languished. Luckily there was a hackathon on that weekend, and I used that as an excuse (motivation) to start and finish it.
Staying simple had helped to get it shipped.
Edit: if anyone's interested, here it is. https://play.google.com/store/apps/details?id=com.mhillsyste...