Stats and trends
Keep progress visible
Muscle group distribution, continuity heatmaps, and volume summaries that actually change how you plan the week.
GymNotebook
Everything you need and nothing you don't.
GymNotebook is a focused workout tracker for iPhone and Android, built for fast logging, clean templates, and real trends. Your data stays on device, with optional platform integrations when you enable them. Dark neon UI. Apple Watch control when you want it on the wrist.
iPhone and Android
Local-first storage
Dark neon UI
Screens
Three core screens, built for flow.
Stats, Templates, and Workout Flow keep training clear and fast without extra noise.
Templates
One tap to start
Saved routines, quick workout launch, and flexible exercise swaps when the machines are taken.
Workout flow
Stay in the zone
Set, rep, and weight tracking, rest timers and alerts, plus helpful platform notifications and Live Activities.
Features
Built from the app itself.
Every section here maps to real screens and workflows inside GymNotebook.
Tracking
Workout logging with rest timers
Log sets, reps, and weight fast while rest timers keep the session moving.
Templates
Save routines and start in seconds
Create templates once, then launch workouts directly from Home.
Stats
Trends that guide your week
Muscle group distribution, continuity heatmaps, and volume snapshots.
Library
Exercise catalog with filters
Filter by muscle group and equipment, search quickly, and add custom moves when the catalogue does not fit.
AI planner
Generate a session from a prompt
Describe a goal, get a suggested workout, and store it as a template. Optional — the notebook still works fully offline without it.
Watch
Control from your wrist
Track and control the session from Apple Watch. Live Activities keep the current set visible on the Lock Screen.
Health
Optional Apple Health
Sync workouts and profile data with HealthKit when you enable it. You can always opt out in Settings.
Body view
See what you trained
Muscle highlights so volume is not just a number — you see which regions you actually worked.
Platforms
iPhone and Android
The same focused tracker on both phones. Free with limited features, or unlock with monthly, yearly, or lifetime purchase after a trial.
Contact
Talk workouts, features, or collabs.
GymNotebook is built independently at Trinio.
hello@trinioapps.onlineStores
Available now
App Store and Google Play. Use it free with limited functionality, or choose a subscription or lifetime unlock.