# Colab Space vs CastleBird

The clearest difference is iOS requirement: Colab Space at 12.0 against CastleBird's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Colab Space | CastleBird |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Size | 21 MB | 93 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Colab Space LLC](https://appshunter.io/developer/1532005677) | [CastleBird](https://appshunter.io/developer/1689612442) |

## What reviewers say

### Colab Space

[App page](https://appshunter.io/ios/app/colab-space/id1532005675)

**Features:** macOS Compatibility

**In-app purchases:** none


### CastleBird

[App page](https://appshunter.io/ios/app/castlebird/id6449547159)

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

**In-app purchases:** none


## Frequently asked questions

### Is Colab Space free?

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

### Is CastleBird free?

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

### Do Colab Space or CastleBird have ads?

Neither Colab Space nor CastleBird shows ads.

### Which is updated more often, Colab Space or CastleBird?

Colab Space ships an update every 3 months, and CastleBird every 3 months. Most recently, Colab Space was updated on October 7, 2026 and CastleBird 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.*