The free app works fine. But the $4.99 Power History add-on is worthless for a number of reasons.
First, the Power History reports are not accurate. The repors do not seem to include periods in which the mac is charging while shut down. The reports sometime include periods while asleep, but sometimes not. The reports sometime includes period when fully charged, sometimes not. .
Second, the Power History reports are inconsistent. Comparing daily data (eg.; adding up all the On Battery useage for a day) to weekly data for a single day often yields different values. For example, adding all of the On Battery useage for a given day might yield 4 hrs 35 minutes. But examining the same day in the weekly report might show 3 hrs 35 minutes. Interestingly, when there is a discrepancy if is always 1 hr difference.
Third. The auto sign in at start up feature does NOT work. If I do not open the app manually after a restart NONE of the usage data for the period from start-up until the time the app is MANUALLY reopened is recorded.
Get the picture? The accuracy of the useage reports cannot be relied upon. UGH!!! I want my money back, AND I want the time back that I’ve wasted testing out this worthless piece of junk.