# Kenbak vs Opcodes

The clearest difference is in-app purchases: Kenbak at none against Opcodes's 1. Opcodes's advantage is update cadence (every 8 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Opcodes sells 1 one-off in-app purchase. Kenbak asks for nothing beyond the download.

Kenbak ships an update every 3 weeks, Opcodes every 8 days. The most recent releases landed on September 9, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Kenbak | Opcodes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (6 ratings)](https://appshunter.io/ios/app/opcodes-retro-cpu-reference/id6760205834/reviews)** |
| Number of ratings | — | **6** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | — | Free |
| Size | 26 MB | 58 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Takhir Zakirov](https://appshunter.io/developer/1717448184) | [John Kennedy](https://appshunter.io/developer/284943103) |

## What reviewers say

### Kenbak

[App page](https://appshunter.io/ios/app/kenbak-1/id6744865263)

**Features:** macOS Compatibility

**In-app purchases:** none


### Opcodes

[App page](https://appshunter.io/ios/app/opcodes-retro-cpu-reference/id6760205834)

This app provides a comprehensive reference for retro CPU opcodes, including detailed descriptions, assembly examples, and historical context. It covers eighteen iconic processors and offers features like search, sorting, and filtering for easy exploration of historical computing information.

**Highlights:** Opcode reference for 18 iconic processors, Detailed instruction descriptions, Hex, octal, decimal values, Flags affected, addressing modes, cycle counts, Assembly code examples, CPU history and pinout diagrams, Simple assembler/disassembler

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Me a Coffee | $0.99 | one-time |


## Frequently asked questions

### Is Kenbak free?

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

### Is Opcodes free?

Opcodes is free to download, with in-app purchases available.

### Do Kenbak or Opcodes have ads?

Neither Kenbak nor Opcodes shows ads.

### Which is updated more often, Kenbak or Opcodes?

Kenbak ships an update every 3 weeks, and Opcodes every 8 days. Most recently, Kenbak was updated on September 9, 2026 and Opcodes on September 20, 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.*