# Kenbak vs DEC Opcodes

The clearest difference is in-app purchases: Kenbak at none against DEC Opcodes's 1. DEC 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. DEC Opcodes sells 1 one-off in-app purchase. Kenbak asks for nothing beyond the download.

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

## The numbers

| Metric | Kenbak | DEC Opcodes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/dec-opcodes/id6760246055/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | — | Free |
| Size | 26 MB | 42 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


### DEC Opcodes

[App page](https://appshunter.io/ios/app/dec-opcodes/id6760246055)

Explore the instruction sets of legendary DEC computers like the PDP and VAX. This app provides detailed information on each instruction, historical context, and interactive lessons. Discover the machines that shaped modern computing.

**Highlights:** Instruction set reference, Historical context and photos, System specifications, Interactive assembly lessons, Search and filtering, Customizable themes, Simple assembler

**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 DEC Opcodes free?

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

### Do Kenbak or DEC Opcodes have ads?

Neither Kenbak nor DEC Opcodes shows ads.

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

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