Just Fasting vs Fasting Center
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Just Fasting
This app helps you track your fasting periods with a simple, uncluttered interface. Easily start custom fasts of varying lengths and monitor your progress with detailed statistics. It's designed to be unobtrusive and straightforward for your intermittent fasting journey.
- Customizable fast durations (hours and days)
- One-tap start for common fasts
- Visual countdown and progress arc
- Detailed fasting statistics
- Streak tracking
- Remember last fast length
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ust Fasting is built to stay out of your way. Open the app and start fasting—no clutter, no noise. Start fasts your way • 16-hour fast — one tap, last meal is now (adjust if you need to). • Custom fast — pick hours (1–72) or longer fasts in days (4+), with no upper limit on days in the picker. • Last meal time defaults to now but you can change it if you finished eating earlier. Stay oriented A large countdown and an arc show how far you’ve come through your fast. When you hit your goal, wrap up with a tap. See your progress Statistics include total fasts, total time fasted, average length, longest fast, current streak, and best streak. The app remembers your last fast length so starting the same routine again is quick.
Fasting Center
Track intermittent and extended fasting with a visual timer and detailed stage insights. Log key health metrics, analyze patterns, and utilize helpful calculators. Integrates with Apple Health and offers extensive customization.
- Customizable fasting plans
- Visual progress ring
- 17 fasting stages with explanations
- Health metric logging (weight, ketones, etc.)
- Pattern analysis and charts
- Extended and intermittent fasting calculators
- Apple Health integration
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Fasting Center is a fasting timer and tracker for intermittent and extended fasting. Start a fast, watch the ring fill, see which stage your body is in, and keep your numbers in one place. Fast your way - Plans from 12:12 to 23:1 (OMAD), extended fasts of 24, 36, 48 and 72 hours, an open fast with no end, or a specific end time - A live ring that shows time elapsed, time left or percent. Tap the ring to switch - Change the start or end time whenever you need to - Milestone notifications and a reminder before your fast ends - A celebration when you finish, with your mood, a note and a picture of your fast to share Know what is happening - 17 fasting stages, from digestion to refeeding, and what each one means - Tips that make fasting easier - The scientific sources behind the stages and the calculators Log what matters - Weight, body fat, waist, ketones, blood glucose and blood pressure - Energy, hunger, motivation and anxiety on a scale of 1 to 10 - Calories, water, sodium, potassium and magnesium - Daily notes, and past fasts you add by hand - Apple Health - read weight, body fat, steps, heart rate and glucose, and write weight and body fat back See your patterns - A fasting calendar, charts of your fasting hours, recent fasts and streaks - Trends for your measurements and how you feel, and your BMI - Patterns found in your own data, such as when you feel hungriest Calculators - Extended fasting - estimate the weight you lose in a fast of 1 to 40 days, split into fat, protein, water and gut contents, with a refeeding guide - Intermittent fasting and calorie deficit - set a goal weight or daily calories and see a day-by-day projection Everywhere you look - Home screen widgets, a Live Activity on the Lock Screen and in the Dynamic Island, and an Apple Watch app with complications - Dark mode, accent colors, and pounds, kilograms or stones - Sixteen languages: English, Spanish, German, French, Portuguese, Italian, Polish, Turkish, Ukrainian, Russian, Japanese, Korean, Arabic, Indonesian, Urdu and Bengali - Import fasts from Easy Fast or Zero, and export your data to Excel - Use it without an account, or sign in with email, Google or Apple to sync between your devices Important Fasting Center is for general wellness and education. It is not medical advice. Extended fasting is not right for everyone, especially if you are pregnant, breastfeeding, under 18, underweight, or have a medical condition such as diabetes or a history of eating disorders. Talk to your doctor before you start. Weight and body composition projections are estimates, not predictions.
Screenshots
Verdict
The clearest difference is rating: Fasting Center at 4.8 against Just Fasting's 4.0. Fasting Center also leads on ratings volume (27 vs 1) and device support (4 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Fasting Center holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Fasting Center has 27 ratings behind it against 1, so its average is the more settled of the two.
Just Fasting ships an update every 2 days, Fasting Center every 3 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | Just Fasting | Fasting Center |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 4.8 (27 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 27 — better |
| Update frequency | Every 2 days — better | Every 3 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 26.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 51 MB |
| Age rating | 4+ | 12+ |
| Developer | Matthew Clark | Andrey Titov |
In-app purchases
Just Fasting
No in-app purchases
Fasting Center
No in-app purchases









