When you are testing an app on five or six different devices, it’s hard to have them all connected to your computer at the same time. One of the great things about Android is that if you install Dropbox and enable third-party app installs, you can actually load your game onto the device directly from Dropbox. This is a huge time saver. Additionally, I can share my Dropbox folder with all my testers so they always get the latest build and I never need to walk them through installing an APK via the command line.
Useful trick using Dropbox to share Android apk distribution with remote team and colleagues.