📲
Installable PWA
Add to home screen on iOS and Android — full-screen, splash screen, offline.
Mobile Web App
Fitness Tracker App
A coach in your pocket, no install required.
Overview
An independent coach was juggling spreadsheets, a Notion database and a chat app to follow forty clients. We replaced all of it with a single, installable PWA that works offline at the gym and syncs the moment the connection is back.
Animations are intentionally calm — the app is used between sets, not to entertain.
Challenges
- 1
Make logging a set faster than typing it into Notes.
- 2
Keep the UI usable with sweaty fingers on a 5-inch screen.
- 3
Sync data reliably from the gym's basement Wi-Fi.
What was built
⏱️
One-tap set logging
Big targets, haptic feedback, automatic rest timer between sets.
📈
Progress charts
Volume, 1RM and streaks plotted from your own history — no comparisons to strangers.
🔌
Offline first
Workouts queue locally and sync the moment the device is online again.
Tech stack
Next.js 16Service WorkersIndexedDBSupabaseChart.jsTailwind CSS v4
Results
120K+
Workouts logged
73%
7-day retention
42 min
Avg. session length
Gallery
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