# Kali Small Business Software vs CastleBird

The clearest difference is iOS requirement: Kali Small Business Software 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.

Kali Small Business Software ships an update every 2 months, CastleBird every 3 months. Both last shipped on November 7, 2026.

## The numbers

| Metric | Kali Small Business Software | CastleBird |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 62 MB | 93 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Chase Ernst](https://appshunter.io/developer/1516390199) | [CastleBird](https://appshunter.io/developer/1689612442) |

## What reviewers say

### Kali Small Business Software

[App page](https://appshunter.io/ios/app/kali-small-business-software/id1540460435)

**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 Kali Small Business Software free?

Kali Small Business Software is free to download, with no in-app purchases.

### Is CastleBird free?

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

### Do Kali Small Business Software or CastleBird have ads?

Neither Kali Small Business Software nor CastleBird shows ads.

### Which is updated more often, Kali Small Business Software or CastleBird?

Kali Small Business Software ships an update every 2 months, and CastleBird every 3 months. Most recently, Kali Small Business Software was updated on November 7, 2026 and CastleBird on November 7, 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.*