If you're still interested, I have just updated iVIBRATE Pocket Edition. This should hopefully fix the issues you were having!
I have tested it and is now working on Android 10 :)
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Yes that's all you need to do to get it to vibrate.
Is there any other games where your phone vibrates?
The only thing I could think of is that maybe there is some permission settings on your phone you need to change for the app?
Otherwise I am really not sure why you are having these issues, especially with the updated version sorry.
got it to work! Eventually.
On my android I went to Settings > searched "vibrat" > clicked "Sounds and vibration" (because i couldn't find it) > "Vibration Intensity" > make sure the "Notifications" bar is active
It was weird cause I get notification vibrations for all sorts of apps on my phone but none of them make it vibrate in app :|
Thank you so much for the fix!