# Intermittent Fasting Clock vs FastZen

The clearest difference is rating: FastZen at 5.0 against Intermittent Fasting Clock's 4.3. FastZen also leads on ads (none vs shown) and update cadence (every 5 days vs monthly). Intermittent Fasting Clock's advantage is iOS requirement (16.1 vs 26.0). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. Intermittent Fasting Clock sells 3 in-app purchases, starting at $1.99 per 7 days and FastZen sells 5 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

FastZen holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 11 and 9 respectively.

Intermittent Fasting Clock ships an update monthly, FastZen every 5 days. The most recent releases landed on October 28, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Intermittent Fasting Clock | FastZen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (11 ratings)](https://appshunter.io/ios/app/intermittent-fasting-clock/id6743335485/reviews) | **[5.0 (9 ratings)](https://appshunter.io/ios/app/fastzen-intermittent-fasting/id6744087602/reviews)** |
| Number of ratings | **11** | 9 |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 43 MB | 27 MB |
| Requires iOS | **16.1** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ESPRESSO TECH (SMC-PRIVATE) LIMITED](https://appshunter.io/developer/1812366711) | [MefjuDev LLC](https://appshunter.io/developer/1777787735) |

## What reviewers say

### Intermittent Fasting Clock

[App page](https://appshunter.io/ios/app/intermittent-fasting-clock/id6743335485)

This app helps you adopt a healthy lifestyle through intermittent fasting. It offers personalized plans, tracks your progress, and provides guidance on nutrition and weight loss. Achieve your wellness goals with easy-to-use tools and insights.

**Highlights:** Personalized fasting plans, Weight loss tracking, Water intake tracker, Step counter, Fasting timer with notifications, Nutrition and health insights, Recipe suggestions

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $1.99 | per 7 days |
| Monthly Access | $3.99 | per month |
| Yearly Access | $19.99 | per year |


### FastZen

[App page](https://appshunter.io/ios/app/fastzen-intermittent-fasting/id6744087602)

This app helps you manage your intermittent fasting journey with custom schedules, progress tracking, and smart reminders. Achieve your weight loss and energy goals with a clean, intuitive interface and motivational features.

**Highlights:** Custom fasting schedules (16:8, 20:4, OMAD, up to 168 hours), Progress tracking with history, streaks, and insights, Smart reminders for fasting start and end times, Achievements and milestones for motivation, Calendar view of completed fasts, Light and dark mode, Widgets

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $2.99 | per month |
| 3 Months | $7.99 | per 3 months |
| Yearly | $19.99 | per year |
| Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Intermittent Fasting Clock free?

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

### Is FastZen free?

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

### Which has better reviews, Intermittent Fasting Clock or FastZen?

FastZen is rated higher. Intermittent Fasting Clock averages 4.3 out of 5 from 11 ratings, while FastZen averages 5.0 from 9 ratings.

### Do Intermittent Fasting Clock or FastZen have ads?

Intermittent Fasting Clock shows ads; FastZen does not.

### Which is updated more often, Intermittent Fasting Clock or FastZen?

Intermittent Fasting Clock ships an update monthly, and FastZen every 5 days. Most recently, Intermittent Fasting Clock was updated on October 28, 2026 and FastZen on October 9, 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.*