# Digital Electronics Guide vs Opcodes

The clearest difference is in-app purchases: Digital Electronics Guide at none against Opcodes's 1. Digital Electronics Guide also leads on iOS requirement (16.0 vs 18.0). Opcodes's advantage is ads (none vs shown) and update cadence (every 8 days vs every 5 weeks). On price, rating and device support there is nothing between them.

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

Digital Electronics Guide holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 2 and 6 respectively.

Digital Electronics Guide ships an update every 5 weeks, Opcodes every 8 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | Digital Electronics Guide | Opcodes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/digital-electronics-guide/id6478166232/reviews)** | [4.8 (6 ratings)](https://appshunter.io/ios/app/opcodes-retro-cpu-reference/id6760205834/reviews) |
| Number of ratings | 2 | **6** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 8 days** |
| Monetization | Ad-supported | **Free** |
| Size | 24 MB | 58 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [John Kennedy](https://appshunter.io/developer/284943103) |

## What reviewers say

### Digital Electronics Guide

[App page](https://appshunter.io/ios/app/digital-electronics-guide/id6478166232)

This app serves as a comprehensive reference for digital electronics, covering essential theory and practical guides. It's designed for students, engineers, and hobbyists to learn and prototype digital circuits with ease. Features include detailed information on logic gates, IC families, and various digital components.

**Highlights:** Logic gate tutorials, IC reference data (TTL 7400, CMOS 4000), Digital circuit design and prototyping, Covers counters, flip-flops, and more, Available in 14 languages, Detailed tutorials and references

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

**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 Digital Electronics Guide free?

Digital Electronics Guide is free to download, with no in-app purchases.

### Is Opcodes free?

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

### Which has better reviews, Digital Electronics Guide or Opcodes?

Digital Electronics Guide is rated higher. Digital Electronics Guide averages 5.0 out of 5 from 2 ratings, while Opcodes averages 4.8 from 6 ratings.

### Do Digital Electronics Guide or Opcodes have ads?

Digital Electronics Guide shows ads; Opcodes does not.

### Which is updated more often, Digital Electronics Guide or Opcodes?

Digital Electronics Guide ships an update every 5 weeks, and Opcodes every 8 days. Most recently, Digital Electronics Guide was updated on November 5, 2026 and Opcodes on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*