# Callibri BeFit vs Serene Form

The clearest difference is update cadence: Callibri BeFit at every 3 months against Serene Form's every 6 months. Serene Form's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

Callibri BeFit ships an update every 3 months, Serene Form every 6 months. The most recent releases landed on October 27, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Callibri BeFit | Serene Form |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Size | 247 MB | 119 MB |
| Requires iOS | 16.0 | **15** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [BRAINBIT INC.](https://appshunter.io/developer/1510548622) | [Advanced Yoga Therapy, Inc](https://appshunter.io/developer/1040239993) |

## What reviewers say

### Callibri BeFit

[App page](https://appshunter.io/ios/app/callibri-befit/id1537952245)

**Features:** Vision Pro support

**In-app purchases:** none


### Serene Form

[App page](https://appshunter.io/ios/app/serene-form/id6461772489)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Callibri BeFit free?

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

### Is Serene Form free?

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

### Do Callibri BeFit or Serene Form have ads?

Neither Callibri BeFit nor Serene Form shows ads.

### Which is updated more often, Callibri BeFit or Serene Form?

Callibri BeFit ships an update every 3 months, and Serene Form every 6 months. Most recently, Callibri BeFit was updated on October 27, 2026 and Serene Form on October 11, 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.*