Workout tracking, charts and offline sync, in one Expo project.
4.796 reviews
620 licences sold
React Native
TypeScript
Expo
Figma
What it is
A complete fitness app: session tracking, a chart layer that survives a thousand entries, HealthKit and Google Fit adapters, and sync that behaves when the gym has no signal.
Fitness apps live in basements with no reception, which is why the interesting engineering is all in the sync layer rather than the charts.
Pulse queues every write locally and reconciles when the connection comes back, with conflict rules you can actually read. The charts are drawn on a canvas rather than in SVG, so a year of daily sessions scrolls without dropping frames on mid-range hardware.
It is an Expo project, so you can run it on a device in about four minutes from unzipping.
What makes it worth the money
Charts that scaleCanvas-drawn, so a year of sessions still scrolls at 60fps.
Works with no signalEvery write queues locally and reconciles on reconnect.
Four minutes to a deviceExpo project — unzip, install, scan the QR code.
A look inside
Session tracking, mid-workout, with the rest timer running.The chart layer at a year of daily entries.The sync queue, shown to the user rather than hidden from them.
In the download
Expo project with EAS build profiles
Offline-first sync queue with conflict rules
Canvas chart layer — 12 chart types
HealthKit and Google Fit adapters
Figma source for all 26 screens
Specification
Screens
26
Charts
12 types, canvas-rendered
Storage
SQLite via Drizzle
Health data
HealthKit + Google Fit adapters
Works with
Expo SDK 51+
React Native 0.74+
iOS 15+
Android 9+
Release history
v2.1.4
Expo SDK 51, plus a fix for duplicate sessions after a long offline stretch.
v2.0.0
Rewrote the chart layer on canvas. Roughly 4× faster on mid-range Android.
Who looks after it
Actively maintained · last release 2 May 2026 · 2 releases logged
MB
Marco BianchiMobile Engineer
The sync queue, the Expo upgrades and the canvas chart layer — it has been his since the first commit.