RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
ScreenTime+ - Automatic Time Tracking menubar mac app
LeechBlock - LeechBlock is an extension for Firefox and Chrome that allows users to block time-wasting sites.
ActivityWatch - Log what you do on your computer. Simple (yet powerful), extensible, no third parties.
ScreenTime - Show your macOS desktop on FaceTime
Screen Time for Android - Displays your screen time in a permanent notification.