# Electronics Reference Toolkit vs OhmsLab

The clearest difference is in-app purchases: Electronics Reference Toolkit at none against OhmsLab's 1. Electronics Reference Toolkit also leads on iOS requirement (16.6 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. OhmsLab sells 1 one-off in-app purchase. Electronics Reference Toolkit asks for nothing beyond the download.

Electronics Reference Toolkit ships an update fortnightly, OhmsLab every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Electronics Reference Toolkit | OhmsLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (12 ratings)](https://appshunter.io/ios/app/electronics-reference-toolkit/id6757098692/reviews)** | — |
| Number of ratings | **12** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free | — |
| Size | 7 MB | 3 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ha Do Thi Thu](https://appshunter.io/developer/1707030622) | [InnovaLabWorks](https://appshunter.io/developer/1888514726) |

## What reviewers say

### Electronics Reference Toolkit

[App page](https://appshunter.io/ios/app/electronics-reference-toolkit/id6757098692)

This app provides a comprehensive suite of tools for electronics calculations and reference. It includes calculators for resistors, LEDs, capacitors, and voltage dividers, along with a unit converter and transistor database. Designed for speed and offline use, it's ideal for students, hobbyists, and engineers.

**Highlights:** Resistor Calculator (4/5 band), Ohm's Law Calculator, LED Resistor Calculator, Capacitor Decoder, Voltage Divider Calculator, Unit Converter, Transistor Reference

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

**In-app purchases:** none


### OhmsLab

[App page](https://appshunter.io/ios/app/ohmslab-ohms-law-and-codes/id6790220501)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OhmsLab Lifetime | $4.99 | one-time |


## Frequently asked questions

### Is Electronics Reference Toolkit free?

Electronics Reference Toolkit is free to download, with no in-app purchases.

### Is OhmsLab free?

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

### Do Electronics Reference Toolkit or OhmsLab have ads?

Neither Electronics Reference Toolkit nor OhmsLab shows ads.

### Which is updated more often, Electronics Reference Toolkit or OhmsLab?

Electronics Reference Toolkit ships an update fortnightly, and OhmsLab every 3 weeks. Most recently, Electronics Reference Toolkit was updated on October 24, 2026 and OhmsLab on October 25, 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.*