Privacy-friendly circuit training exercises are the focus of the GitHub project PFCTE.

github.com/SecUSo/privacy-friendly-circuit-tra…
PFCTE homepage screenshot

About PFCTE

PFCTE is an open source Android app for timing interval-based training sessions, such as circuit training. It provides configurable timers for exercise and rest phases. Users can create their own exercises, combine them into exercise sets, and set reminders for planned sessions. The app also shows statistics such as time spent training and calories burned.

The project's stated aim is to support training sessions without advertising or unnecessary permissions. Calorie figures are calculated with the Metabolic Equivalent of Task (MET) formula. Backup and restore use the separate Privacy Friendly Backup app, which the source says can also be used to move data to a new phone. The source does not describe what data, if any, leaves the device.

Key features

  • Configurable timers for exercise and rest phases
  • User-created exercises that can be combined into reusable exercise sets
  • Reminders for planned training sessions
  • Statistics including time spent training and calories burned
  • Calorie calculation based on the MET formula
  • Data backup and restore through the separate Privacy Friendly Backup app
Best for: Android users who want a timer for circuit or interval training without advertising.
Good for
  • The project states that it has no advertising and does not request unnecessary permissions.
  • The source code is published under the GPLv3 license.
  • Users can build their own exercises and exercise sets.
Watch out for
  • The listed platform is Android only.
  • Calorie figures come from the MET formula, so they are estimates rather than measured values.

PFCTE at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Platforms
Android
Open source
Yes · Source code
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026

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PFCTE FAQ

How does the app calculate calories?
The calorie calculation is based on the Metabolic Equivalent of Task (MET) formula. The project cites a specific MET value source in its documentation.
Can I back up my training data?
The project says you can back up and restore the app's data with the Privacy Friendly Backup app. That app can also be used to migrate data to a new phone.
What license does the project use?
Privacy Friendly Circuit Trainer is licensed under the GNU General Public License version 3 (GPLv3).
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