# Opamp tools vs Electronic Circuits Calculator

The clearest difference is in-app purchases: Electronic Circuits Calculator at none against Opamp tools's 1. Electronic Circuits Calculator also leads on update cadence (every 2 months 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. Electronic Circuits Calculator asks for nothing beyond the download.

Opamp tools ships an update every 12 months, Electronic Circuits Calculator every 2 months. The most recent releases landed on October 10, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Opamp tools | Electronic Circuits Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 2 months** |
| Monetization | — | Ad-supported |
| Size | 4 MB | 21 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 |


### Electronic Circuits Calculator

[App page](https://appshunter.io/ios/app/electronic-circuits-calculator/id6444422711)

This comprehensive electronics toolkit offers over 130 interactive calculators, circuit tools, and guides. It's designed for users of all levels, from beginners to professionals, to assist with learning, prototyping, and quick calculations in electronics engineering.

**Highlights:** Over 130 interactive calculators, Circuit tools and guides, Step-by-step explanations and formulas, Ideal for learning and prototyping, Light and dark mode support, Available in 14 languages

**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 Electronic Circuits Calculator free?

Electronic Circuits Calculator is free to download, with no in-app purchases.

### Do Opamp tools or Electronic Circuits Calculator have ads?

Electronic Circuits Calculator shows ads; Opamp tools does not.

### Which is updated more often, Opamp tools or Electronic Circuits Calculator?

Opamp tools ships an update every 12 months, and Electronic Circuits Calculator every 2 months. Most recently, Opamp tools was updated on October 10, 2026 and Electronic Circuits Calculator on October 19, 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.*