PAIesque

A transparent, device-agnostic cardiovascular fitness and RHR tracker.

New in version 36

DEINSTALL existing version prior 35 before using this version!

What's New
- Bring back dialog to set measuring times to calculate RHR from.
- Changed scaling factor of TRIMP calculation (iTRIMP) to better match PAI values of commercial products.

PAIesque helps you to track and improve your cardiovascular health using your heart rate data. It calculates a personalized activity score and monitors your Resting Heart Rate, giving you clear, actionable insights into your fitness progress—all on your device, with no subscriptions or data sharing.Prerequisite To get started, you must first install and configure Gadgetbridge to collect heart rate data from your compatible fitness tracker or smartwatch.How It Works: PAIesque is inspired by public research from the NTNU Cardiac Exercise Research Group (CERG). Their foundational studies on the PAI (Personal Activity Intelligence) metric demonstrates a powerful finding: "Our research shows that those who achieve 100 PAI or more every week over time live on average eight years longer than others." While PAIesque does NOT use the official PAI® algorithm (that is not known anyway), it applies this same, powerful principle: Your score rises faster when your heart works harder - so long both brisk walks and vigorous workouts move you toward your goal.Key Differentiators:

Open & Transparent: Unlike “black box” scores, every calculation is based on the disclosed Karvonen Heart Rate Reserve (HRR) method in combination with a simplified Training Impulse Calculation (TRIMP). You always know how your score is determined.
Universal & Consistent: Use it with almost any fitness tracker supported by Gadgetbridge (Amazfit, Garmin, Xiaomi, Fitbit, 100+ devices). Your scoring method stays the same even if you change devices.
Privacy-First & Local: Everything is processed on your phone. Your heart rate data never leaves your device, and no internet connection or account is required.

Note: This is an independent, community-developed application. It is based on public scientific principles and foundational exercise physiology methods but is not affiliated with or endorsed by NTNU CERG, and its score is distinct from the proprietary Personal Activity Intelligence (PAI®) metric.

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid

Version 36 (36) suggested Added on Feb 16, 2026

This version requires Android 14 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- android.permission.health.READ_HEART_RATE
- android.permission.health.READ_HEART_RATE_VARIABILITY
- org.ojrandom.paiesque.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 3.8 MiB PGP Signature | Build Log

New in version 35

DEINSTALL existing version before using this version!

What's New
- BREAKING existing app versions: data is now read from Health Connect instead of Gadgetbridge.db
- This version is work in progress. Still much to do:
* Add more TRIMP calculations along with PAI-like
* Help and documentation

Version 35 (35) - Added on Feb 15, 2026

This version requires Android 14 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- android.permission.health.READ_HEART_RATE
- android.permission.health.READ_HEART_RATE_VARIABILITY
- org.ojrandom.paiesque.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 3.7 MiB PGP Signature | Build Log

New in version 34

What's New
- Expanded device compatibility: Added support for generic/unrecognized fitness devices
- Heart rate data from more wearables can now be synchronized (until they get official support by Gadgetbridge)

Version 34 (34) - Added on Dec 24, 2025

This version requires Android 8.0 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- org.ojrandom.paiesque.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 2.0 MiB PGP Signature | Build Log

Versions

Find Apps