# Zero vs iFast

Zero and iFast both sit at 4.8 stars, but that hides the real split: 86% of iFast's written reviews are positive against 32% of Zero's. iFast also leads on in-app purchases (none vs 10) and update cadence (every 3 days vs every 2 weeks). Zero's advantage is ads (none vs shown) and ratings volume (445K vs 23). On price, rating and device support there is nothing between them.

Both are free to download. Zero sells 8 in-app purchases, starting at $9.99 per month. iFast asks for nothing beyond the download.

Zero holds the better App Store score, 4.8 against 4.7. That said, the two scores are not equally well evidenced: Zero has 445K ratings behind it against 23, so its average is the more settled of the two. Written reviews complicate that: 32% of Zero's written reviews are positive against 86% of iFast's, so the app with the better star average is not the one people write more warmly about.

Zero ships an update every 2 weeks, iFast every 3 days. The most recent releases landed on November 10, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Zero | iFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (445K ratings)](https://appshunter.io/ios/app/zero-fasting-and-food-tracker/id1168348542/reviews)** | [4.7 (23 ratings)](https://appshunter.io/ios/app/ifast-simple-fast-tracker/id1670053693/reviews) |
| Number of ratings | **445K** | 23 |
| Positive reviews | 32.0% of reviews | **85.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Freemium | **Ad-supported** |
| Best chart rank | **#113** | — |
| Size | 188 MB | 62 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Zero Longevity Science, Inc.](https://appshunter.io/developer/1397458636) | [Manu Mehrotra](https://appshunter.io/developer/1607252474) |

## What reviewers say

### Zero

[App page](https://appshunter.io/ios/app/zero-fasting-and-food-tracker/id1168348542)

**Currently charting:** #113 Top Grossing · Health & Fitness (US App Store)

This app helps you track intermittent fasting and nutrition to achieve body composition changes. It integrates fasting, protein intake, meals, hydration, and habits for a holistic approach to weight loss and metabolic health.

**Highlights:** Intermittent fasting timers and streaks, Photo-based meal logging with macro analysis, Personalized daily protein targets, Water intake tracking, Habit tracking (movement, sleep, mood), Progress visualization and trend analysis, Expert insights on fasting and nutrition

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zero Plus Subscription | $9.99 | per month |
| Zero Plus Subscription | $9.99 | per month |
| Zero Plus Subscription | $69.99 | per year |
| Zero Plus Subscription | $69.99 | per year |
| Zero Plus Subscription | $69.99 | per year |
| Zero Plus Subscription | $69.99 | per year |
| Zero Plus Subscription | $89.99 | per year |
| Zero Plus Subscription | $89.99 | per year |

**What reviewers like**

- 🚀 Easy to use
- 📊 Helpful tracking and data
- 💡 Informative learning resources
- 🔍 Detailed fasting information
- 🤝 Sense of community

**What reviewers complain about**

- 💰 Expensive premium subscription
- 🔒 Forced account creation
- 🙄 Intrusive ads and upsells
- 🤔 Inconsistent or confusing UI changes
- 🐛 Syncing and login issues

**Reported bugs**

- Password reset problems
- Inaccurate fasting time tracking
- Inability to exit trial without subscribing

**Requested features**

- Custom fasting periods longer than 24 hours
- Ability to edit fasting type and duration
- Integration with more health/fitness apps
- Water intake tracking
- Personalized fasting recommendations


### iFast

[App page](https://appshunter.io/ios/app/ifast-simple-fast-tracker/id1670053693)

This app helps you track your fasting periods and monitor your progress towards your health goals. It supports various popular fasting methods, including circadian rhythm fasting and intermittent fasting schedules.

**Highlights:** Track fasting periods, Monitor progress, Support for popular fasting types, Circadian rhythm fasting, Intermittent fasting schedules, Custom prolonged fasts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Zero free?

Zero is free to download, with in-app purchases available.

### Is iFast free?

iFast is free to download, with no in-app purchases.

### Which has better reviews, Zero or iFast?

Zero is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while iFast averages 4.7 from 23 ratings.

### Do Zero or iFast have ads?

iFast shows ads; Zero does not.

### Which is updated more often, Zero or iFast?

Zero ships an update every 2 weeks, and iFast every 3 days. Most recently, Zero was updated on November 10, 2026 and iFast on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*