Photo to calories
Snap your plate or describe it in plain words. StayFit estimates the calories and macros, and you set the portion afterwards so they scale with it.
Calorie deficit, made obvious
Your whole day in one honest number
StayFit works like a bank account for calories. Your metabolism is the budget, meals are the spending, and steps and workouts earn it back.
Free to use. No ads. Try Premium free for 7 days.
Everything in one app
Food, training and progress in the same place, because they are the same problem.
An AI Coach that knows your day
Ask about your plan, your meals or your training, right from Home. The coach only reads your data after you agree on a consent screen, and every plan includes AI credits each month.
Guided workouts
Form animations for every movement, a rest timer, and a live session that logs each set as you go.
Progress you can see
Your weight trend, your target date and your daily deficit in one place, so you know the plan is working.
How it works
- 1
Tell it about you
Your height, weight, age and sex, your activity level and your goal: lose fat, maintain or gain muscle.
- 2
Get your daily budget
StayFit calculates your metabolism with the Mifflin-St Jeor formula, scales it to your activity and adjusts it for your goal.
- 3
Log and watch the balance
Food spends the budget. Steps and workouts earn part of it back. What is left is your deficit or your surplus.
Pricing
The whole calorie balance is free. Paid plans add the AI and the deeper analysis. Both paid plans start with a 7-day free trial.
Free
$0
No time limit
- The whole calorie balance
- Barcode scanner and food search
- 1 programme
- 10 AI credits a month
FOOD AI
$4.99/month
or $49.90/year (save 16%)
- Everything in Free
- AI food logging: photo or words
- 100 AI credits a month
Premium
$9.99/month
or $83.99/year (about $7.00 a month, save 29%)
- Everything in FOOD AI
- Unlimited programmes and the program library
- Strength insights, CSV export, evolution video
| Feature | Free | FOOD AI | Premium |
|---|---|---|---|
| The calorie balance | ✓ | ✓ | ✓ |
| Food search and barcode scanner | ✓ | ✓ | ✓ |
| Manual calorie entry and macros | ✓ | ✓ | ✓ |
| Live gym session log | ✓ | ✓ | ✓ |
| Weight trend and history | ✓ | ✓ | ✓ |
| AI credits each month | 10 | 100 | 100 |
| AI Coach (spends credits) | ✓ | ✓ | ✓ |
| AI food logging (photo or words) | ✕ | ✓ | ✓ |
| Programmes | 1 | 1 | Unlimited |
| Program library | ✕ | ✕ | ✓ |
| Strength and tonnage insights | ✕ | ✕ | ✓ |
| CSV export | ✕ | ✕ | ✓ |
| Evolution video from your photos | ✕ | ✕ | ✓ |
| Full-screen reminders | ✕ | ✕ | ✓ |
Prices are shown in US dollars; the store shows your local price before you buy. Subscriptions are billed by Apple or Google, and you can cancel any time in your Apple Account or in Google Play.
Your data, in plain words
- An account is required
- Progress photos stay on your device
- There are no ads, no advertising identifier, and no tracking across other apps or websites.
- When you use AI meal logging, the photo or the words you give it are sent to Google’s Gemini API to estimate the food, and only then.
- You can delete your account and everything in it from inside the App.
Questions
Do I need an account?
Yes. At the end of setup you sign in with Apple or Google. The account keeps your plan and history in sync across devices and carries your subscription, friends and the leaderboard.
How is my daily calorie budget calculated?
From the Mifflin-St Jeor formula using your height, weight, age and sex, multiplied by your activity level, then adjusted for your goal (lose fat, maintain, gain muscle). Food spends the budget; steps and workouts earn part of it back.
Why does a day I did not log show no bar?
By design. A day where you logged nothing is not a zero-calorie day, so it is left out of the charts and the averages instead of dragging them down.
How do I log food fastest?
Tap Add food, pick the meal, then choose Photo, Scan (barcode), Describe (type it in plain words) or a manual calorie entry. Quick adds log a preset food in one tap. Set the portion afterwards and the calories and macros scale automatically.
Where do my progress photos go?
Nowhere. They stay in the App’s private storage on your phone, are never uploaded, and are deleted when you delete the App.
Does StayFit read Apple Health / Health Connect?
Only if you allow it, and only to read steps, active energy and workouts so your burn is credited. StayFit never writes to Health, and you can revoke the permission in your system settings.
How do I cancel Premium?
Subscriptions are billed by Apple or Google, so cancel in your Apple Account → Subscriptions, or in Google Play → Payments & subscriptions. Cancelling before the trial ends costs nothing.
How do I delete my account and data?
Profile → Settings → Delete account. It erases your account and its data from our database. Or email us and we will do it for you.
More help on the support page.
Start today
Free on iPhone and Android, with no ads. Try Premium free for 7 days.