# Blumoto vs DEC Opcodes

The clearest difference is in-app purchases: Blumoto at none against DEC Opcodes's 1. Blumoto also leads on iOS requirement (15.0 vs 18.0). DEC Opcodes's advantage is update cadence (every 8 days vs every 20 months). On price, ads and device support there is nothing between them.

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

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

## The numbers

| Metric | Blumoto | 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 20 months | **Every 8 days** |
| Monetization | — | Free |
| Size | 65 MB | 42 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Martin Gernss](https://appshunter.io/developer/1576583320) | [John Kennedy](https://appshunter.io/developer/284943103) |

## What reviewers say

### Blumoto

[App page](https://appshunter.io/ios/app/blumoto/id6498719071)

**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 Blumoto free?

Blumoto 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 Blumoto or DEC Opcodes have ads?

Neither Blumoto nor DEC Opcodes shows ads.

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

Blumoto ships an update every 20 months, and DEC Opcodes every 8 days. Most recently, Blumoto 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.*