Day 256. More playing about with Android App Inventor today and I made another very simple (and when I say very simple, I mean VERY simple) app called ColourVoter. It just has three buttons - Yes, No, Not Sure - that turn the screen different colours. The idea would be that if you were presenting an idea to a group of people and they all had the app, you could check for understanding by asking them to click the appropriate button and hold their phone up. At a glance, seeing lots of green means they get it, red means they don't get it, and orange means you have some more explaining to do.
If you want to download it and try it out you can download the .apk file here. (You need dev permissions on your phone to install it, and of course this is Android only)