This application is to vibrate your phone when your out-going call is answered by the other side. You don't have to listen to or look at the phone before the call gets connected.
Just tested Android 10 on Pixel3a, with the additional OutCallWatcher app installed, and it works well.
*For former users*
If you have the old version installed and it works, please IGNORE this update. If the old version does not work, this might not work either. But if you do want to give it a try, you have to UNINSTALL the old version in order to install this update.
This app has only been tested on Google Pixel phones with stock Android system image. We do NOT guarantee that it can work on any other phones. And it also requests additional steps to help it work. If you do not understand those operations, please stop use it and simply uninstall it. Do not give 1-star rate just because it cannot work on your phone.
To have this app work on a un-rooted phone, you have manually grant the permissions and install another companion application.
Please read the permission guide https://sites.google.com/view/cucumbersw/vibratecall-permission-guide and the companion app installation guide https://sites.google.com/view/cucumbersw/outgoing-call-watcher before you decide to install this application.