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App records the screen usage time and battery usage parameters over a discharge cycle. Have to keep it running.

It displays:

  • Total screen ON duration over a discharge cycle (gets reset when connected to charger or if app is restarted)
  • Last screen blanking time
  • Duration on battery (discharge period)
  • Average discharge rate
  • Average usage time left
  • Instantaneous battery current
  • Instantaneous time left based on current or time left as reported by BMS, if available
  • And if BMS reports, some battery information like battery technology, charge cycles, lost battery capacity are also shown

Wanted to observe my own screen usage time and battery usage behaviour, hence the app.

I hope to include more features in future as time permits, and if I ever get better learning stuff. There may be bugs.

Tested and found to be working on:

  • Jolla C
  • Xperia XZ2 Compact
  • Xiaomi Redmi Note 4

Note: the 64 bit build has not been tested.

Application versions: 
File harbour-usage-0.1-1.armv7hl.rpm78.28 KB07/07/2021 - 20:31
File harbour-usage-0.1-1.aarch64.rpm79.51 KB08/07/2021 - 09:04
File harbour-usage-0.1-2.aarch64.rpm84.46 KB09/07/2021 - 21:05
File harbour-usage-0.1-2.armv7hl.rpm83.24 KB09/07/2021 - 21:05


  - Cover: show temperature if charging
  - Cover: corrected some minor misalignments
  - Cover: added a background image
  - Readings: ensure instantaneous time left always shows positive value
  - Readings: do not show instantaneous time left if this cannot be calculated (eg. Jolla C)



Initial version