# Opamp tools vs Digital Electronics Guide

The clearest difference is in-app purchases: Digital Electronics Guide at none against Opamp tools's 1. Digital Electronics Guide also leads on update cadence (every 5 weeks vs every 12 months). Opamp tools's advantage is ads (none vs shown) and iOS requirement (12.0 vs 16.0). On price and device support there is nothing between them.

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

Opamp tools ships an update every 12 months, Digital Electronics Guide every 5 weeks. The most recent releases landed on September 26, 2026 and August 27, 2026 respectively.

## The numbers

| Metric | Opamp tools | Digital Electronics Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/digital-electronics-guide/id6478166232/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 5 weeks** |
| Monetization | — | Ad-supported |
| Size | 4 MB | 24 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Opamp tools

[App page](https://appshunter.io/ios/app/opamp-tools/id1616271826)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock pro feature | $1.99 | one-time |


### 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


## Frequently asked questions

### Is Opamp tools free?

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

### Is Digital Electronics Guide free?

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

### Do Opamp tools or Digital Electronics Guide have ads?

Digital Electronics Guide shows ads; Opamp tools does not.

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

Opamp tools ships an update every 12 months, and Digital Electronics Guide every 5 weeks. Most recently, Opamp tools was updated on September 26, 2026 and Digital Electronics Guide on August 27, 2026.

---

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