# Opcodes vs MicroController Learning Lab

The clearest difference is price: Opcodes at Free against MicroController Learning Lab's $2.99. MicroController Learning Lab's advantage is in-app purchases (none vs 1) and iOS requirement (16.0 vs 18.0). On ads and device support there is nothing between them.

Opcodes is free to download; MicroController Learning Lab costs $2.99 up front. Opcodes sells 1 one-off in-app purchase. MicroController Learning Lab asks for nothing beyond the download.

## The numbers

| Metric | Opcodes | MicroController Learning Lab |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.8 (6 ratings)](https://appshunter.io/ios/app/opcodes-retro-cpu-reference/id6760205834/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 days | — |
| Monetization | Free | — |
| Size | 58 MB | 5 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [John Kennedy](https://appshunter.io/developer/284943103) | [Yuhsiu Lai](https://appshunter.io/developer/433114647) |

## What reviewers say

### 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 |


### MicroController Learning Lab

[App page](https://appshunter.io/ios/app/microcontroller-learning-lab/id6772872299)

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

**In-app purchases:** none


## Frequently asked questions

### Is Opcodes free?

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

### Is MicroController Learning Lab free?

MicroController Learning Lab costs $2.99, with no in-app purchases.

### Do Opcodes or MicroController Learning Lab have ads?

Neither Opcodes nor MicroController Learning Lab shows ads.

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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.*