I don’t think the 24hr measurement is useless in respect to more accurate actual screen on time measurements. If you click and add each blue bar in the chart in between charge cycles, this gives you the screen on time of the device when not connected to charger.
Looking at the daily screen on times doesn’t put into the equation if the phone was topped off multiple times during a day. It leads to misleading screen on times.
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No problem then, I’ll add the 24 hour screenshot to when I post tonight.