Hello!
I just setup a super easy way for Android users to try out the rewritten, new Wikipedia app without having to download and install new APKs every now and then. Simple steps:
1. Join the alpha testers group: https://groups.google.com/forum/#!forum/wpandroidapptesters. Make sure you use the same Google Account that is used on the Play store on your Android device (you can check this by opening the play store app, and opening the left nav drawer) 2. Go to https://play.google.com/apps/testing/org.wikipedia and opt-in to alpha. Note that you need to have completed step 1 first, otherwise this URL will be a 404. Again, make sure it is the same Google account. 3. Install the wikipedia app from the link at the bottom of the page on step2. It should just take you to the regular play store and let you install. It should show up on your phone shortly (assuming it is the same Google account).
Next time we push out an alpha (rather frequently, I imagine), your phone will automatically update to the new version without you having to do anything! This is also open to anyone (with a Google account).
Try it out, and send us feedback! (Use the 'send feedback' button in the app :)).