# A4Calc vs Kukai

The clearest difference is price: Kukai at Free against A4Calc's $4.99. Kukai also leads on update cadence (every 3 weeks vs every 8 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Kukai is free to download; A4Calc costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

A4Calc ships an update every 8 months, Kukai every 3 weeks. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | A4Calc | Kukai |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/kukai/id1563851375/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 2 MB | 360 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Farren Domenici](https://appshunter.io/developer/583666476) | [军 杨](https://appshunter.io/developer/1489139639) |

## What reviewers say

### A4Calc

[App page](https://appshunter.io/ios/app/a4calc/id734140182)

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

**In-app purchases:** none


### Kukai

[App page](https://appshunter.io/ios/app/kukai/id1563851375)

This application connects to automatic key cutting machines via Bluetooth. It allows users to decode, cut, duplicate keys, and create key profiles, aiming to improve efficiency for locksmiths globally.

**Highlights:** Bluetooth connectivity to machines, Key decoding, Key cutting, Key duplication, Key profile creation, Intelligent updates

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is A4Calc free?

A4Calc costs $4.99, with no in-app purchases.

### Is Kukai free?

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

### Do A4Calc or Kukai have ads?

Neither A4Calc nor Kukai shows ads.

### Which is updated more often, A4Calc or Kukai?

A4Calc ships an update every 8 months, and Kukai every 3 weeks. Most recently, A4Calc was updated on October 16, 2026 and Kukai on October 12, 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.*