Minimum Android phone spec to run remote

We want to buy a cheap mobile just to run presenter remote in our services. I've got an old Samsung that is too ancient to run the app. Can anyone tell me the minimum spec (like what Android version you need) to be able to run it?

According to Google Play, you need Android 7.0 and up. And don't forget that you need a paid WorshipTools plan to use the remote. See https://play.google.com/store/apps/details?id=com.worshipextreme.presenterremote

Thank you. That's a pretty old version, so should be fine. Yes, we have a paid subscription.