I have set up beta tests for several of my apps.
If you want to always have the latest version of the apps and don’t mind a little instability here and there, you can sign up for beta testing.
You need to sign up for each beta individually. The links are available below.
After you join the betas, you’ll start getting regular updates from Google Play, but for the beta versions instead of just the regular ones. But don’t worry, once a regular version is released, you’ll get that too!
Here are the current links for my betas.