Android: Have you ever typed or read on your smartphone while walking at the same time? (Be honest!) For those occasions, Transparent Screen can help you out by showing you what's right in front of you while you use your phone as usual.
To use the app, simply hit the button to start it and make your screen transparent. You can customise the transparency level and adjust the resolution, as well as rotate the camera image.
Because the app does take a hit on your battery, you won't want to have it on all the time, but it does work. Apps in the forefront are easy to read, while the camera image in the background is clear enough. I have a bookworm daughter who has a bad habit of walking with a tablet held up in front of her nose while walking down the hallway and stairs. Of course, the best thing is to get her to stop doing that, but in the meantime, I can perhaps keep her from tripping with this app. If you too like to walk and read or walk and text, pick up the free app on the market.