# Zero vs 72Hour Fasting Timer

The clearest difference is price: Zero at Free against 72Hour Fasting Timer's $1.99. Zero also leads on rating (4.8 vs 4.3) and ratings volume (445K vs 3). 72Hour Fasting Timer's advantage is in-app purchases (none vs 10) and review sentiment (67% vs 32%). On ads, chart position and device support there is nothing between them.

Zero is free to download; 72Hour Fasting Timer costs $1.99 up front. Zero sells 8 in-app purchases, starting at $9.99 per month. 72Hour Fasting Timer asks for nothing beyond the download.

Zero holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Zero has 445K ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 32% of Zero's written reviews are positive against 67% of 72Hour Fasting Timer'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, 72Hour Fasting Timer every 4 days. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Zero | 72Hour Fasting Timer |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.8 (445K ratings)](https://appshunter.io/ios/app/zero-fasting-and-food-tracker/id1168348542/reviews)** | [4.3 (3 ratings)](https://appshunter.io/ios/app/72hour-fasting-timer/id6745131744/reviews) |
| Number of ratings | **445K** | 3 |
| Positive reviews | 32.0% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | **Freemium** | Paid |
| Best chart rank | **#109** | #193 |
| Size | 188 MB | 7 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Zero Longevity Science, Inc.](https://appshunter.io/developer/1397458636) | [POWER SATELLITE LLC](https://appshunter.io/developer/1809833198) |

## What reviewers say

### Zero

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

**Currently charting:** #109 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


### 72Hour Fasting Timer

[App page](https://appshunter.io/ios/app/72hour-fasting-timer/id6745131744)

**Currently charting:** #193 Top Paid · Health & Fitness (US App Store)

This app assists users in tracking extended fasting periods of 24, 48, or 72 hours. It provides progress zones, statistics, and reminders to help users stay focused and motivated during their fasting journey.

**Highlights:** Smart fasting timer, Progress zones (fat burning, autophagy), Statistics and history, HealthKit sync, Notifications and reminders, Minimalist design

**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 72Hour Fasting Timer free?

72Hour Fasting Timer costs $1.99, with no in-app purchases.

### Which has better reviews, Zero or 72Hour Fasting Timer?

Zero is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while 72Hour Fasting Timer averages 4.3 from 3 ratings.

### Do Zero or 72Hour Fasting Timer have ads?

Neither Zero nor 72Hour Fasting Timer shows ads.

### Which is updated more often, Zero or 72Hour Fasting Timer?

Zero ships an update every 2 weeks, and 72Hour Fasting Timer every 4 days. Most recently, Zero was updated on November 6, 2026 and 72Hour Fasting Timer on November 5, 2026.

### Which is more popular, Zero or 72Hour Fasting Timer?

Zero currently peaks at #109 in the App Store charts, and 72Hour Fasting Timer at #193. Chart position reflects recent download velocity rather than total install base.

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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.*