Is there a way or an app that allows me to push my latest android build to all devices that have it installed? My app is not in the Google Play market yet but would like my testers to not have to manually install every build I push.
Why don't you just use dropbox?
Install it where your developing the application then share the folder of available apks (releases) to the testers that also install dropbox on their phones. When an update occures (you move a file to the folder) they'll get an update notification, then they can go and install it right from dropbox.