# Zero vs Zero Fast

Zero and Zero Fast both sit at 4.8 stars, but that hides the real split: 100% of Zero Fast's written reviews are positive against 32% of Zero's. Zero's advantage is ratings volume (445K vs 1) and chart position (#119 vs unranked). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Zero sells 10 in-app purchases, starting at $9.99 per month and Zero Fast sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Zero Fast holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Zero has 445K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 32% of Zero's written reviews are positive against 100% of Zero Fast's.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 31, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Zero | Zero Fast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (445K ratings)](https://appshunter.io/ios/app/zero-fasting-and-food-tracker/id1168348542/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zero-fast-fasting-tracker/id6748047745/reviews)** |
| Number of ratings | **445K** | 1 |
| Positive reviews | 32.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | **#119** | — |
| Size | 195 MB | 41 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [Zero Longevity Science, Inc.](https://appshunter.io/developer/1397458636) | [APPE LATTE LIMITED](https://appshunter.io/developer/1480686912) |

## What reviewers say

### Zero

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

**Currently charting:** #119 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


### Zero Fast

[App page](https://appshunter.io/ios/app/zero-fast-fasting-tracker/id6748047745)

This app guides you through intermittent fasting, indicating when your body enters fat-burning and ketosis. It offers group challenges for motivation without requiring calorie counting or strict diets.

**Highlights:** Intermittent fasting timer, Fat-burning and ketosis indicators, Group fasting challenges, No calorie counting, Meal planner integration

**Features:** iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zero Fast Monthly | $3.99 | per month |
| Zero Fast Annually | $29.99 | per year |


## Frequently asked questions

### Is Zero free?

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

### Is Zero Fast free?

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

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

Zero Fast is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while Zero Fast averages 5.0 from 1 ratings.

### Do Zero or Zero Fast have ads?

Neither Zero nor Zero Fast shows ads.

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

Zero ships an update every 2 weeks, and Zero Fast every 2 weeks. Most recently, Zero was updated on October 31, 2026 and Zero Fast on October 30, 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.*