# Zero vs LadyFast

The clearest difference is rating: Zero at 4.8 against LadyFast's 1.0. Zero also leads on monetization model (freemium vs subscription) and ratings volume (445K vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Zero sells 8 in-app purchases, starting at $9.99 per month and LadyFast sells 2 in-app purchases, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.

Zero holds the better App Store score, 4.8 against 1.0. 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.

Zero ships an update every 2 weeks, LadyFast every 3 weeks. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Zero | LadyFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (445K ratings)](https://appshunter.io/ios/app/zero-fasting-and-food-tracker/id1168348542/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/ladyfast/id6747602155/reviews) |
| Number of ratings | **445K** | 1 |
| Positive reviews | 32.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | **Freemium** | Subscription |
| Best chart rank | **#112** | — |
| Size | 188 MB | 7 MB |
| Requires iOS | **17.0** | 17.4 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Zero Longevity Science, Inc.](https://appshunter.io/developer/1397458636) | [9 TO 3 LAB PTY LTD](https://appshunter.io/developer/1745764648) |

## What reviewers say

### Zero

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

**Currently charting:** #112 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 (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


### LadyFast

[App page](https://appshunter.io/ios/app/ladyfast/id6747602155)

This wellness app helps women plan and track fasting, weight, and wellbeing in sync with their hormonal cycles. It offers customizable plans, progress tracking, and wellbeing logs, adapting to each phase of the menstrual cycle for a supportive and personal approach to health.

**Highlights:** Cycle-aligned fasting plans, Weight progress tracking, Wellbeing and mood logs, Customizable fasting schedules, Visual progress summaries, Menstrual cycle integration

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Metabolic Reset - Monthly | $0.49 | per month |
| Metabolic Mastery - Yearly | $2.99 | per year |


## Frequently asked questions

### Is Zero free?

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

### Is LadyFast free?

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

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

Zero is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while LadyFast averages 1.0 from 1 ratings.

### Do Zero or LadyFast have ads?

Neither Zero nor LadyFast shows ads.

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

Zero ships an update every 2 weeks, and LadyFast every 3 weeks. Most recently, Zero was updated on November 5, 2026 and LadyFast 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.*