# Electronics Kit vs Operational Amplifiers Guide

The clearest difference is in-app purchases: Operational Amplifiers Guide at none against Electronics Kit's 5. Electronics Kit's advantage is ads (none vs shown) and iOS requirement (9.0 vs 16.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Electronics Kit sells 5 one-off in-app purchases. Operational Amplifiers Guide asks for nothing beyond the download.

Electronics Kit ships an update every 6 weeks, Operational Amplifiers Guide every 2 months. The most recent releases landed on September 24, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Electronics Kit | Operational Amplifiers Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (65 ratings)](https://appshunter.io/ios/app/electronics-kit/id1190014476/reviews)** | — |
| Number of ratings | **65** | — |
| Positive reviews | 91.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 53 MB | 17 MB |
| Requires iOS | **9.0** | 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

### Electronics Kit

[App page](https://appshunter.io/ios/app/electronics-kit/id1190014476)

This app offers a comprehensive suite of electronics tools and calculators for hobbyists and professionals. It includes features for component value calculation, pinout diagrams, and various electronic resources. Users can access a free version with ads or a PRO version for enhanced functionality and an ad-free experience.

**Highlights:** Component value calculators, Extensive pinout diagrams, Electronic resource library, SMD resistor code lookup, Ohm's law calculator, RC charging/discharging calculator, Frequency converter

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock no. of components limit | $0.99 | one-time |
| Unlock Pro feature | $1.99 | one-time |
| 'Show steps' in nodal analysis | $2.99 | one-time |
| Unlock controlled sources | $2.99 | one-time |
| 'Show steps' in equivalent cir | $3.99 | one-time |


### Operational Amplifiers Guide

[App page](https://appshunter.io/ios/app/operational-amplifiers-guide/id6467499897)

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

**In-app purchases:** none


## Frequently asked questions

### Is Electronics Kit free?

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

### Is Operational Amplifiers Guide free?

Operational Amplifiers Guide is free to download, with no in-app purchases.

### Do Electronics Kit or Operational Amplifiers Guide have ads?

Operational Amplifiers Guide shows ads; Electronics Kit does not.

### Which is updated more often, Electronics Kit or Operational Amplifiers Guide?

Electronics Kit ships an update every 6 weeks, and Operational Amplifiers Guide every 2 months. Most recently, Electronics Kit was updated on September 24, 2026 and Operational Amplifiers Guide on September 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.*