# Zero vs Fast

Zero and Fast both sit at 4.8 stars, but that hides the real split: 75% of Fast's written reviews are positive against 32% of Zero's. Zero's advantage is ratings volume (445K vs 3.3K) and update cadence (every 2 weeks vs every 2 months). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Zero sells 10 in-app purchases, starting at $9.99 per month and Fast sells 8 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

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 3.3K, so its average is the more settled of the two. Written reviews complicate that: 32% of Zero's written reviews are positive against 75% of Fast'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, Fast every 2 months. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Zero | Fast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (445K ratings)](https://appshunter.io/ios/app/zero-fasting-and-food-tracker/id1168348542/reviews)** | [4.7 (3.3K ratings)](https://appshunter.io/ios/app/fast-fasting-tracker-and-timer/id1545737691/reviews) |
| Number of ratings | **445K** | 3.3K |
| Positive reviews | 32.2% of reviews | **74.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | **#88** | — |
| Size | 195 MB | 116 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 17+ | 12+ |
| Developer | [Zero Longevity Science, Inc.](https://appshunter.io/developer/1397458636) | [Maxima Apps](https://appshunter.io/developer/1153277200) |

## What reviewers say

### Zero

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

**Currently charting:** #88 Top Grossing · Health & Fitness (US App Store)

This app tracks intermittent fasting and nutrition to help users achieve real 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, Smart meal logging with photo recognition, Personalized daily protein target tracking, Integrated fasting and protein tracking, Water and habit tracking, Science-based insights on fasting and nutrition

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zero Plus Subscription | $9.99 | per month |
| Zero Plus Subscription | $9.99 | per month |
| Zero Plus Subscription | $39.99 | per year |
| Zero Plus Subscription | $49.99 | 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 | $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


### Fast

[App page](https://appshunter.io/ios/app/fast-fasting-tracker-and-timer/id1545737691)

This app helps you track intermittent fasting routines, monitor progress, and analyze health data. It offers educational content, motivational challenges, and a journal to record your feelings. Connect with friends for support and motivation on your wellness journey.

**Highlights:** Fasting timer and tracker, Progress analytics and history, Educational 'Know It' section, Motivational challenges and trophies, Mood tracker and journal, Health app integration (steps), Fasting buddy feature

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fast Premium Monthly | $4.99 | per month |
| Fasting Monthly | $14.99 | per month |
| Fasting Annually | $19.99 | per year |
| Fasting Premium | $27.99 | per 3 months |
| Fast Premium Yearly | $29.99 | per year |
| Fasting Premium Yearly | $39.99 | per year |
| Fasting One Time Special Offer | $19.99 | one-time |
| Fasting Pro | $49.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 👍 Helpful for weight loss
- 👍 Motivating with trophies
- 👍 Customizable fasting plans
- 👍 Integrates with health apps

**What reviewers complain about**

- 🐛 Timer issues/inaccuracies
- 🐛 Inability to edit fasting times
- 🐛 Syncing/data saving problems
- 🐛 Crashes and glitches
- 🔍 Lacking advanced features

**Reported bugs**

- Timer not accurately recording fasting times
- Inability to update weight in app
- Crashing when trying to view friend's status

**Requested features**

- Option to edit fasting start/end times
- More detailed analytics and progress tracking
- Improved syncing and data saving reliability
- Expanded customization options


## Frequently asked questions

### Is Zero free?

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

### Is Fast free?

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

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

Zero is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while Fast averages 4.7 from 3.3K ratings.

### Do Zero or Fast have ads?

Neither Zero nor Fast shows ads.

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

Zero ships an update every 2 weeks, and Fast every 2 months. Most recently, Zero was updated on October 28, 2026 and Fast on October 25, 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.*