# Quantum Cats Dance vs Opcodes

The clearest difference is in-app purchases: Quantum Cats Dance at none against Opcodes's 1. Quantum Cats Dance also leads on update cadence (daily vs every 8 days). 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. Quantum Cats Dance asks for nothing beyond the download.

Quantum Cats Dance ships an update daily, Opcodes every 8 days. The most recent releases landed on September 17, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Quantum Cats Dance | 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 | **Daily** | Every 8 days |
| Monetization | — | Free |
| Size | 4 MB | 58 MB |
| Requires iOS | 18.2 | **18.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Eiki Sato](https://appshunter.io/developer/1018719847) | [John Kennedy](https://appshunter.io/developer/284943103) |

## What reviewers say

### Quantum Cats Dance

[App page](https://appshunter.io/ios/app/quantum-cats-dance/id6757285319)

**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 Quantum Cats Dance free?

Quantum Cats Dance is free to download, with no in-app purchases.

### Is Opcodes free?

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

### Do Quantum Cats Dance or Opcodes have ads?

Neither Quantum Cats Dance nor Opcodes shows ads.

### Which is updated more often, Quantum Cats Dance or Opcodes?

Quantum Cats Dance ships an update daily, and Opcodes every 8 days. Most recently, Quantum Cats Dance was updated on September 17, 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.*