# Electronics Tools & Calculator vs Opamp tools

The clearest difference is in-app purchases: Electronics Tools & Calculator at none against Opamp tools's 1. Electronics Tools & Calculator also leads on update cadence (every 6 weeks vs every 12 months). Opamp tools's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15.0). On price and device support there is nothing between them.

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

Electronics Tools & Calculator ships an update every 6 weeks, Opamp tools every 12 months. The most recent releases landed on September 27, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Electronics Tools & Calculator | Opamp tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (16 ratings)](https://appshunter.io/ios/app/electronics-tools-and-calculator/id1581885136/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 12 months |
| Monetization | Free | — |
| Size | 63 MB | 4 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anas Abubakar](https://appshunter.io/developer/1581534101) | [Siu Yuen Ho](https://appshunter.io/developer/814088527) |

## What reviewers say

### Electronics Tools & Calculator

[App page](https://appshunter.io/ios/app/electronics-tools-and-calculator/id1581885136)

This app serves as a pocket-sized electronics lab, offering a comprehensive reference for components and circuits. It simplifies complex calculations for filters, inductors, and various circuit configurations, aiding both engineers and hobbyists in their design processes.

**Highlights:** Electronic component reference, Electronic circuit reference, Filter design calculators, Inductor winding calculators, Transformer winding calculators, Resistor and capacitor calculations, Ohm's law and power calculations

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Electronics Tools & Calculator free?

Electronics Tools & Calculator is free to download, with no in-app purchases.

### Is Opamp tools free?

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

### Do Electronics Tools & Calculator or Opamp tools have ads?

Electronics Tools & Calculator shows ads; Opamp tools does not.

### Which is updated more often, Electronics Tools & Calculator or Opamp tools?

Electronics Tools & Calculator ships an update every 6 weeks, and Opamp tools every 12 months. Most recently, Electronics Tools & Calculator was updated on September 27, 2026 and Opamp tools on September 26, 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.*