# Fit In Progress vs Circa

The clearest difference is update cadence: Fit In Progress at monthly against Circa's every 3 months. Fit In Progress also leads on iOS requirement (15.6 vs 17.6). 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.

Fit In Progress ships an update monthly, Circa every 3 months. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Fit In Progress | Circa |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Size | 189 MB | 55 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [FIT IN PROGRESS](https://appshunter.io/developer/1720412190) | [JULIEN DLUBALA](https://appshunter.io/developer/1868793414) |

## What reviewers say

### Fit In Progress

[App page](https://appshunter.io/ios/app/fit-in-progress/id6474037372)

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

**In-app purchases:** none


### Circa

[App page](https://appshunter.io/ios/app/circa-natural-rhythm/id6758007213)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fit In Progress free?

Fit In Progress is free to download, with no in-app purchases.

### Is Circa free?

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

### Do Fit In Progress or Circa have ads?

Neither Fit In Progress nor Circa shows ads.

### Which is updated more often, Fit In Progress or Circa?

Fit In Progress ships an update monthly, and Circa every 3 months. Most recently, Fit In Progress was updated on October 7, 2026 and Circa on October 5, 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.*