I've always wanted to have this on occasion for myself from time to time to sample my individual time spend. I wonder what kind of apps they use to achieve this

I've always wanted to have this on occasion for myself from time to time to sample my individual time spend. I wonder what kind of apps they use to achieve this and what the UI looks like. You'd need some sort of instant stopwatch buttons for frequently recurring activities and also allowing for custom stopwatches. I guess something like a set of Amazon Dash buttons could be useful or some kind of badge readers distributed about an environment to tag on and tag off keyed to some activity for that location.