Type
PWA · SaaS
PWASaaSFitnesses · en · frOwn product
Gym Routine — train without friction, from any device.
Progressive web app to create and manage gym routines with progress tracking, statistics, recurring calendar and personal-trainer mode. Three languages (es, en, fr). Designed, built and deployed end to end.
Stack
Next.js · MongoDB · PayPal
My role
Design + fullstack development + deploy
Context
Own product
Routines & calendar
Statistics & progress
Exercises
Plans & pricing
Context
Existing gym apps are either too complex or too simple.
Gym Routine was born from the frustration of not finding a tool that works for both casual users and professional coaches. One app, four access profiles (free, premium, trainer/studio, admin), no friction. The challenge: clean multi-role architecture, offline-first experience with sync on reconnect, and routine creation that is as fast as it is intuitive.
Before
Paid apps with unnecessary features, no real offline support, no trainer mode, or simple apps without stats or progression.
After
An installable PWA, offline-first (train and log without signal; sync when back online), with body measurements and progress photos, recurring calendar and a trainer panel that pays for itself with one client.
What makes this project special
Multi-role architecture from day one — the same codebase serves free, premium, trainer/studio and admin users with granular access logic. IndexedDB + Service Worker: offline-first for routines, workouts and cached exercises; the queue syncs when back online. Real-time stats (volume, streak, muscle distribution, records). PayPal subscriptions, es/en/fr i18n, B2B landing for coaches and legal pages in production.
Multi-roleOffline-firstes · en · frRecurring calendarPDF / CSV exportPayPal
Core features
Routines
Drag & drop creation, automatic time estimates and a filterable exercise library.
Calendar
Planning with daily/weekly/monthly recurrence, .ics export and edit by day or future series.
Progress
Body measurements, progress photos and stats: volume, streak, muscle distribution and records.
Trainer panel
Up to 10 or 30 clients (Trainer/Studio), templates, alerts, PDF export per client and email invitations.
4
access profiles (free, premium, trainer/studio, admin)
3
languages (es, en, fr) with i18n across the app
0
native app dependencies — installable PWA on any device
Technical stack
Frontend
Next.jsReactTypeScriptTailwind CSSi18nRecharts
Backend
Next.js API RoutesMongoDBJWT + CSRFZodPayPalResend
PWA / Offline
Dexie (IndexedDB)Service WorkerWeb Push APICloudinary
Deployment
VercelMongoDB Atlas
— LET'S WORK TOGETHER _
You have an idea. I build it.
Figma mockup, spec document or just an idea — I handle full-stack development end to end.