@christianselig for iPad I can see a day view with screentime (I don’t use screentime for my own account just for my son’s account but I don’t think the day view is only for kids accounts). It’s very useful for seeing how much time my son has used various apps.
It looks like ScreenTime for the MacOS can show by a single day at least in Ventura (see https://support.apple.com/guide/mac-help/track-app-and-device-usage-in-screen-time-mchlf2c0c770/13.0/mac/13.0) does that not show what you need?
@christianselig Timing can do that (and more)
@christianselig Timing.app is great, but too fiddle for my tastes. RescueTime also. Both of those are really more for in-depth analysis over time. So great if that's what you're looking for.
Personally I don't find I need that though. I usually just want to quickly measure for a couple of days to see if it matches my intuition. For that the best is the criminally under-recommended Time Sink, made by a pair of OS X legends, which achieves this goal with the least fuss https://manytricks.com/timesink/