# Voltage Regulator vs Electronic Devices Quiz

The clearest difference is ads: Voltage Regulator at none against Electronic Devices Quiz's shown. Electronic Devices Quiz's advantage is update cadence (every 3 weeks vs every 9 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Voltage Regulator sells 1 one-off in-app purchase and Electronic Devices Quiz sells 7 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Voltage Regulator ships an update every 9 months, Electronic Devices Quiz every 3 weeks. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Voltage Regulator | Electronic Devices Quiz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/voltage-regulator/id1149145965/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | Freemium | — |
| Size | 3 MB | 68 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Arshad Iqbal](https://appshunter.io/developer/1547001151) |

## What reviewers say

### Voltage Regulator

[App page](https://appshunter.io/ios/app/voltage-regulator/id1149145965)

Calculate resistor combinations for adjustable voltage regulators. This tool helps electronics hobbyists and professionals determine desired output voltages and resistor values. Results can be exported and shared easily.

**Highlights:** Adjustable voltage regulator support, Calculate resistor combinations, Determine resistor values, Export results to CSV, Share CSV via iCloud/AirDrop

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro features | $1.99 | one-time |


### Electronic Devices Quiz

[App page](https://appshunter.io/ios/app/electronic-devices-quiz/id1584633982)

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Package | $4.99 | per month |
| 3 Months Package | $9.99 | per 3 months |
| 6 Months Package | $14.99 | per 6 months |
| 1 Year Package | $19.99 | per year |
| 1500 Coins | $0.99 | one-time |
| 3500 Coins | $1.99 | one-time |
| 6000 Coins | $2.99 | one-time |


## Frequently asked questions

### Is Voltage Regulator free?

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

### Is Electronic Devices Quiz free?

Electronic Devices Quiz is free to download, with in-app purchases available.

### Do Voltage Regulator or Electronic Devices Quiz have ads?

Electronic Devices Quiz shows ads; Voltage Regulator does not.

### Which is updated more often, Voltage Regulator or Electronic Devices Quiz?

Voltage Regulator ships an update every 9 months, and Electronic Devices Quiz every 3 weeks. Most recently, Voltage Regulator was updated on October 24, 2026 and Electronic Devices Quiz on October 20, 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.*