I/O Fit
Workout & nutrition tracker

Train smarter.
Track everything.

I/O Fit plans your training, logs every set with smart progression and shows how your body responds, all in one clean app.

Coming soon on the App Store See features

Free to use. Pro unlocks food tracking and deeper insights.

Everything you need to train

No clutter, no ads. The core of I/O Fit is free and works offline, with or without an account.

Workout logging

Log sets in seconds with last time's numbers beside every set, a rest timer and automatic personal records.

Smart progression

I/O Fit suggests when to add reps or weight, based on what you actually lifted last time.

Programs & templates

Follow a starter program or build your own weekly split. Home tells you what to train today.

Gym tools

Plate calculator, one-rep-max estimates and warm-up sets that fit your working weight.

Streaks & achievements

Weekly goals, a training calendar and badges that reward showing up.

Sync & sharing

Start as a guest, sign in whenever you like, and share exercises, templates and programs with a link.

Built for the gym floor

Big targets, dark mode and one-handed logging, so the app stays out of your way between sets.

Home screen with this week's progress
Your week at a glance
Logging sets during a workout
Fast set logging
Muscle recovery map
Recovery map
Food diary with calories and macros
Food tracking
PRO

Go further with I/O Fit Pro

Track what you eat and get deeper insights into your training. Choose monthly, yearly or a one-time lifetime unlock, and manage it anytime from your App Store or Google Play account.

Workout logging, programs, tools and sync stay free.
  • Food trackingSearch foods or scan barcodes, with calories, macros and water.
  • Progress reportsWeekly and monthly recaps of training, nutrition and weight.
  • Recovery mapSee which muscles are fresh and which still need rest.
  • Body measurementsTrack waist, chest, arms, body fat and more over time.

Questions

Is I/O Fit free?

Yes. Workout logging, programs, templates, exercise history, tools, achievements and cloud sync are free. I/O Fit Pro is an optional upgrade that adds food tracking, progress reports, the recovery map and body measurements.

Do I need an account?

No. You can use I/O Fit as a guest and your data stays on your phone. Create an account whenever you want a backup or to use I/O Fit on another device; your guest data comes with you.

How do I cancel Pro?

Subscriptions are managed by Apple or Google. On iPhone, open Settings → your name → Subscriptions. On Android, open Google Play → Profile → Payments & subscriptions. More help

What happens to my data?

Your training data is yours. It's never sold and there are no ads. Read the privacy policy for the details.