Three quick steps. Read each one before you tap. Most "it didn't work" reports are just step 3 being skipped.
Brave hangs on large app downloads (you'll see "Downloading…" stuck at 100% forever). This is a Brave bug, not the app.
Close Brave. Open Chrome or Samsung Internet (both come pre-installed on your phone), go to gettingyoumoving.co.uk/android and start again. Takes 10 seconds.
Leave your email below, then create your account in the app with that same email — that's how I find you. Whenever a new version is ready, I'll drop a quick message inside the app with the download link. That's the only thing I'll ever message you about.
You're probably on Brave. Brave's security scanner blocks large app files. The download bar shows "100%" but the file never actually saves. Brave is the only Android browser that does this consistently.
Fix: Cancel the Brave download (tap the X). Open Chrome or Samsung Internet instead (both already installed on your phone). Go to gettingyoumoving.co.uk/android in that browser and tap Download. Done in 30 seconds.
You already have GYM installed from before. Android won't let two versions sit on top of each other if they're signed differently.
Fix:
Your account, friends, workouts, streaks all stay in the cloud. Sign back in with the same email and everything's there.
Different phones name things differently. Try in this order:
Some phones show a slightly different screen. Common variations:
Tap the equivalent toggle and you'll be sent back to install.
Play Protect sometimes flags sideloaded apps as a precaution. The app is safe; Play Protect simply hasn't scanned it yet because it isn't on the Play Store.
Fix: When the warning appears, tap Install anyway or More details → Install anyway. If you can't see that option:
GYM needs about 600 MB free during install (it downloads at 280 MB but expands while installing).
Fix: Settings → Battery and device care (Samsung) or Settings → Storage → Free up space. Clear browser cache or remove an app you don't use, then try installing GYM again.
Phone may be running on Low Power Mode. Charge to 20%+ or turn Low Power off, then re-tap the APK.
If still nothing: force-close your browser (recent apps → swipe browser away), reopen My Files → Downloads, tap the APK directly from there.
Email me direct with your phone model and what you've tried: williamawere@hotmail.com. I read every message.
Meanwhile, the Play Store listing is coming soon. Drop me an email and I'll ping you the moment it goes live.