Activity Tracker Importer
Open the play history your device records to see the same statistics as the Activity Tracker, with the files read in your browser and nothing uploaded.
Activity lives in MUOS/info/track on the storage MustardOS uses for its data, either SD1, SD2 or USB. Each title has its own record, so open the whole track folder or pick several records at once. A playtime_data.json from an older release opens too. A device on your network can show the same report without copying anything, from Activity Tracker in the Web Dashboard.
Select a title in the table to change its name, launches, play time or dates, or to remove it. Download saves your changes in the same form you opened them: one file keeps its name, and several records download as a zip to copy back into MUOS/info/track, replacing the files that are there. A removed title is kept as an empty record, so copying it back clears it on the device too.