Best intermittent fasting apps for iPhone (2026)
What are the best intermittent fasting apps for iPhone in 2026?
For a popular, free fasting timer, Zero is the usual starting point, though protein, water and custom fasts sit behind its paid Plus tier. Fasting Week suits people whose eating window changes through the week: you set each day's window and planned meal times, save a seven-day plan, log when you actually ate, and start a separate fasting timer yourself; it also logs protein, water and weight, needs no account and keeps records on your device. MyFast also offers a weekly schedule with CSV export and one-time unlocks. Yazio fits people who want calorie and macro counting alongside fasting. Simple is a guided option with insights and reminders, but it has no direct food logging. These are tracking tools, not medical advice; talk to a doctor before fasting with a health condition.
Disclosure: ODEL makes Fasting Week. We list other apps on their merits, say where they are the better choice, and link our sources. Store ratings and prices are from the public App Store listing on the date shown.
Quick comparison
| App | Best for | Platforms | Price | Store rating |
|---|---|---|---|---|
| Zero: Fasting & Food Tracker | A popular free fasting timer | iOS, Android, watchOS | Free to download | 4.8 (445,319 ratings, 2026-11-02) |
| Fasting Week (ours) | Weekly eating-window planning with a meal journal | iOS | Free to download | — |
| MyFast: Fasting Timer App | Weekly fasting schedules with data export | iOS, Android | Free to download | 4.7 (3,179 ratings, 2026-11-02) |
| YAZIO | Fasting combined with calorie and macro counting | iOS, Android | Free to download | 4.7 (51,584 ratings, 2026-11-02) |
| Simple | Guided fasting with insights and reminders | iOS, Android | Free to download | 4.7 (410,824 ratings, 2026-11-02) |
1. Zero: Fasting & Food Tracker: best for A popular free fasting timer
Zero: Fasting & Food Tracker (by Zero Longevity Science, Inc.) is best for A popular free fasting timer. Fasting timers, streaks and trends. Articles and learning content. Available on iPhone, Android and Apple Watch. The main limitations: Protein score, water tracking and custom fasts need Zero Plus; Free users get three meal logs; A reviewer says basic timer use required payment after a subscription lapsed.
Why we picked it
- Fasting timers, streaks and trends
- Articles and learning content
- Available on iPhone, Android and Apple Watch
Limitations
- Protein score, water tracking and custom fasts need Zero Plus
- Free users get three meal logs
- A reviewer says basic timer use required payment after a subscription lapsed
Sources: apps.apple.com, fortune.com
2. Fasting Week: best for weekly eating-window planning with a meal journal
Fasting Week (by ODEL) is best for weekly eating-window planning with a meal journal. Set each day's eating window and planned meal times; save seven days. Log actual meal times and notes; start the fasting timer yourself. Protein, water and weight logging, widgets and Live Activities. No account and no ads; records stay on your device. The main limitations: No Apple Health sync in the current version; iPhone only; new app with few ratings; Premium is an optional subscription.
Why we picked it
- Set each day's eating window and planned meal times; save seven days
- Log actual meal times and notes; start the fasting timer yourself
- Protein, water and weight logging, widgets and Live Activities
- No account and no ads; records stay on your device
Limitations
- No Apple Health sync in the current version
- iPhone only; new app with few ratings
- Premium is an optional subscription
Sources: apps.apple.com
3. MyFast: Fasting Timer App: best for weekly fasting schedules with data export
MyFast: Fasting Timer App (by Intermittent Fasting Inc.) is best for weekly fasting schedules with data export. Weekly schedule of fasting and eating windows. Widget, weight charts and CSV export. One-time unlocks rather than a subscription. The main limitations: A reviewer says schedule mode runs like a clock rather than when you actually start; The same review says manual mode keeps no history.
Why we picked it
- Weekly schedule of fasting and eating windows
- Widget, weight charts and CSV export
- One-time unlocks rather than a subscription
Limitations
- A reviewer says schedule mode runs like a clock rather than when you actually start
- The same review says manual mode keeps no history
Sources: apps.apple.com
4. YAZIO: best for fasting combined with calorie and macro counting
YAZIO (by YAZIO GmbH) is best for fasting combined with calorie and macro counting. Fasting plus calorie and macro tracking. Recipes. The main limitations: Free version is limited; Fasting and calorie logs overlap and need manual input.
Why we picked it
- Fasting plus calorie and macro tracking
- Recipes
Limitations
- Free version is limited
- Fasting and calorie logs overlap and need manual input
Sources: fortune.com
5. Simple: best for guided fasting with insights and reminders
Simple (by AM APPS LTD) is best for guided fasting with insights and reminders. Fortune's overall pick. Fasting and hydration tracking, insights and reminders. The main limitations: Premium is a monthly subscription with no free trial; No direct food logging or recipe database.
Why we picked it
- Fortune's overall pick
- Fasting and hydration tracking, insights and reminders
Limitations
- Premium is a monthly subscription with no free trial
- No direct food logging or recipe database
Sources: fortune.com
How we chose
- Handles a schedule that changes from day to day
- Separates the plan from what actually happened (manual timer, real meal times)
- Meal, protein, water and weight logging without switching apps
- What the free tier includes and how paid tiers are billed
- Privacy: account requirements and where records are stored
Questions
Which fasting app lets me set a different eating window each day?
Fasting Week and MyFast both plan by the week. Fasting Week lets you set each day's eating window and planned meal times, then log actual meals; MyFast runs a weekly schedule of fasting and eating windows.
What's a free alternative to Zero for meal logging?
Zero's free tier allows three meal logs. Fasting Week includes a meal journal with actual meal times and notes, and Yazio adds calorie counting; both have paid tiers, so check what each free version includes.
Which intermittent fasting app works without an account?
Fasting Week needs no account and stores meals, windows, fasts and logs on the device. Check the listings for Zero, MyFast, Yazio and Simple for their account and sync requirements.
Is a fasting app medical advice?
No. Zero, Fasting Week, MyFast, Yazio and Simple are tracking tools. Ask a doctor before fasting if you have a medical condition, are pregnant or take medication.