# Three Pigs Cantonese vs DEC Opcodes

The clearest difference is price: DEC Opcodes at Free against Three Pigs Cantonese's $0.99. DEC Opcodes also leads on update cadence (every 8 days vs every 3 months). Three Pigs Cantonese's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

DEC Opcodes is free to download; Three Pigs Cantonese costs $0.99 up front. DEC Opcodes sells 1 one-off in-app purchase. Three Pigs Cantonese asks for nothing beyond the download.

Three Pigs Cantonese ships an update every 3 months, DEC Opcodes every 8 days. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Three Pigs Cantonese | DEC Opcodes |
| --- | --- | --- |
| Price | $0.99 | **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 months | **Every 8 days** |
| Monetization | — | Free |
| Size | 1.2 GB | 42 MB |
| Requires iOS | 18.2 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jeffrey Dick](https://appshunter.io/developer/821338172) | [John Kennedy](https://appshunter.io/developer/284943103) |

## What reviewers say

### Three Pigs Cantonese

[App page](https://appshunter.io/ios/app/three-pigs-cantonese/id6738539133)

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

**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 Three Pigs Cantonese free?

Three Pigs Cantonese costs $0.99, with no in-app purchases.

### Is DEC Opcodes free?

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

### Do Three Pigs Cantonese or DEC Opcodes have ads?

Neither Three Pigs Cantonese nor DEC Opcodes shows ads.

### Which is updated more often, Three Pigs Cantonese or DEC Opcodes?

Three Pigs Cantonese ships an update every 3 months, and DEC Opcodes every 8 days. Most recently, Three Pigs Cantonese was updated on October 3, 2026 and DEC Opcodes on October 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.*