# Electronics Reference Toolkit vs Voltage Calculator

The clearest difference is device support: Voltage Calculator at 3 against Electronics Reference Toolkit's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Electronics Reference Toolkit ships an update fortnightly, Voltage Calculator every 2 weeks. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Electronics Reference Toolkit | Voltage Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/electronics-reference-toolkit/id6757098692/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 weeks |
| Monetization | Free | — |
| Size | 7 MB | 72 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ha Do Thi Thu](https://appshunter.io/developer/1707030622) | [ESDEV Teknoloji](https://appshunter.io/developer/1693053468) |

## 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

**In-app purchases:** none


### Voltage Calculator

[App page](https://appshunter.io/ios/app/voltage-calculator/id6790529321)

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

**In-app purchases:** none


## Frequently asked questions

### Is Electronics Reference Toolkit free?

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

### Is Voltage Calculator free?

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

### Do Electronics Reference Toolkit or Voltage Calculator have ads?

Neither Electronics Reference Toolkit nor Voltage Calculator shows ads.

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

Electronics Reference Toolkit ships an update fortnightly, and Voltage Calculator every 2 weeks. Most recently, Electronics Reference Toolkit was updated on October 6, 2026 and Voltage Calculator on October 3, 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.*