# PerfectFast vs Primal Fast

The clearest difference is in-app purchases: PerfectFast at none against Primal Fast's 2. Primal Fast's advantage is iOS requirement (15.1 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Primal Fast sells 2 in-app purchases, starting at $6.99 per month. PerfectFast asks for nothing beyond the download.

PerfectFast ships an update every 10 days, Primal Fast weekly. The most recent releases landed on October 3, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | PerfectFast | Primal Fast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/perfectfast/id6759067877/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | Free | — |
| Size | 27 MB | 43 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Idan Lupinsky](https://appshunter.io/developer/1876630037) | [SERGEI JELUASVILI](https://appshunter.io/developer/1896539644) |

## What reviewers say

### PerfectFast

[App page](https://appshunter.io/ios/app/perfectfast/id6759067877)

This app helps you track intermittent and extended fasting periods with a clean, focused interface. It supports various fasting schedules, custom durations, and provides detailed history and statistics to monitor your progress.

**Highlights:** Intermittent and extended fast tracking, Custom fasting schedules, Fasting history and statistics, Reminders and notifications, Apple Watch companion app, Live Activity support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Primal Fast

[App page](https://appshunter.io/ios/app/primal-fast-carnivore-timer/id6780590381)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Primal Fast Pro — Monthly | $6.99 | per month |
| Primal Fast Pro — Annual | $34.99 | per year |


## Frequently asked questions

### Is PerfectFast free?

PerfectFast is free to download, with no in-app purchases.

### Is Primal Fast free?

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

### Do PerfectFast or Primal Fast have ads?

Neither PerfectFast nor Primal Fast shows ads.

### Which is updated more often, PerfectFast or Primal Fast?

PerfectFast ships an update every 10 days, and Primal Fast weekly. Most recently, PerfectFast was updated on October 3, 2026 and Primal Fast on September 27, 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.*