I wrote a very bare-bones version of this a few years ago for my personal use on MacOS, which has been running ever since: https://github.com/goerz/activity_log

I wrote a very bare-bones version of this a few years ago for my personal use on MacOS, which has been running ever since: https://github.com/goerz/activity_logger/ https://github.com/goerz/activity_logger/ This looks much more polished though, so it may be time for a switch!