After some trial and error, I've found a few apps that make an old Android phone worth keeping, and all of them are free. I've been using Camo Studio to turn my old phone into a wireless webcam, and the difference in video quality is day and night. If you have two old phones, or even one old phone and your current one, Simple Nanny can turn them into a baby or pet monitoring setup. Old phones are worth more than a drawerRepurposing old phones keeps them out of the e-waste pile, which is a good thing on its own. Even if you only use one or two of these, your old phone earns its keep.