# Zero vs Fasting Diary

The clearest difference is chart position: Zero at #101 against Fasting Diary's unranked. Fasting Diary's advantage is review sentiment (43% vs 32%) and iOS requirement (13.0 vs 17.0). On price, update cadence, 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 Fasting Diary sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Zero ships an update every 2 weeks, Fasting Diary fortnightly. The most recent releases landed on October 29, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Zero | Fasting Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (445K ratings)](https://appshunter.io/ios/app/zero-fasting-and-food-tracker/id1168348542/reviews)** | — |
| Number of ratings | **445K** | — |
| Positive reviews | 32.2% of reviews | **42.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | **#101** | — |
| Size | 195 MB | 63 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Zero Longevity Science, Inc.](https://appshunter.io/developer/1397458636) | [Dimo Co.,Ltd.](https://appshunter.io/developer/495557603) |

## What reviewers say

### Zero

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

**Currently charting:** #101 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


### Fasting Diary

[App page](https://appshunter.io/ios/app/fasting-diary-if-tracker/id6483368664)

This app helps users achieve their weight loss and health goals through intermittent fasting. It provides guidance, motivation, and customizable fasting schedules to support users in burning fat, boosting energy, and improving metabolic health.

**Highlights:** Customizable fasting schedules, Plans for beginners and experts, One-tap start/stop for fasting, Adjustable eating and fasting times, Fasting alerts and reminders

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro monthly | $0.99 | per month |
| Pro 3 months | $1.99 | per 3 months |
| Pro yearly | $2.99 | per year |
| Pro | $2.99 | one-time |


## Frequently asked questions

### Is Zero free?

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

### Is Fasting Diary free?

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

### Do Zero or Fasting Diary have ads?

Neither Zero nor Fasting Diary shows ads.

### Which is updated more often, Zero or Fasting Diary?

Zero ships an update every 2 weeks, and Fasting Diary fortnightly. Most recently, Zero was updated on October 29, 2026 and Fasting Diary on October 15, 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.*