Iron Log is a local-first Android app that runs one job well: it enforces PG-ART, a fully algorithmic strength progression. You log the reps you actually hit; the app applies the gate and hands you your next target. There is no RPE slider to guess at and no spreadsheet to maintain. Log a set, and it sets your next number.

Everything stays on the phone. No account, no sign-up, no cloud sync; your training history lives in local storage on the device and nowhere else, so the app works offline and keeps working whether or not any server is around. It's an open source workout tracker for Android with no subscription and no telemetry.

It's built for focused sessions: four sets per exercise, about 90 seconds of rest, and a four-exercise session that runs roughly 45 minutes by design. The full rules (the 3-of-4 success gate, the single-rep step, and the weight reset) are written up on the PG-ART methodology page.

How progression works

Reps climb inside a fixed 6-10 range. Clear the gate at 10 and the weight steps up about 5-10% while the target drops back to 6, a built-in functional deload the method calls the Volume Sawtooth. Each cycle sits on a heavier baseline than the last:

The y-axis is training volume (weight × reps). At a fixed weight the volume climbs as the rep target steps 6 → 7 → 8 → 9 → 10; hit 10 and the weight goes up while reps reset to 6, so volume dips, then each new cycle climbs from a higher baseline. Iron Log applies this automatically from the reps you log.

BASKORP.APPS.IRONLOG.INSTALL v1.4.0+

Signed releases, built in CI. Each version is a signed release build produced by the project's continuous-integration pipeline, distributed as an APK through GitHub Releases.

Download APK Source

Sideload note: Iron Log isn't on the Play Store. Download the APK from the release page, then on your phone allow installs from your browser or files app under Settings → Apps → Install unknown apps, and open the file to install. Updates work the same way: grab the newer APK when a release ships.

Want the reasoning before the download? The PG-ART methodology page lays out every rule the app follows, plus ten months of the creator's own logged training data.