# PerfectFast vs Calivra

The clearest difference is update cadence: PerfectFast at every 10 days against Calivra's every 3 weeks. PerfectFast also leads on iOS requirement (17.6 vs 26.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PerfectFast ships an update every 10 days, Calivra every 3 weeks. The most recent releases landed on October 19, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | PerfectFast | Calivra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/perfectfast-fasting-tracker/id6759067877/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Free | — |
| Size | 31 MB | 9 MB |
| Requires iOS | **17.6** | 26.4 |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Idan Lupinsky](https://appshunter.io/developer/1876630037) | [slehyder martinez](https://appshunter.io/developer/6786435660) |

## What reviewers say

### PerfectFast

[App page](https://appshunter.io/ios/app/perfectfast-fasting-tracker/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


### Calivra

[App page](https://appshunter.io/ios/app/calivra/id6796107656)

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

**In-app purchases:** none


## Frequently asked questions

### Is PerfectFast free?

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

### Is Calivra free?

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

### Do PerfectFast or Calivra have ads?

Neither PerfectFast nor Calivra shows ads.

### Which is updated more often, PerfectFast or Calivra?

PerfectFast ships an update every 10 days, and Calivra every 3 weeks. Most recently, PerfectFast was updated on October 19, 2026 and Calivra on October 1, 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.*