# Voltage Regulator vs Matrix

The clearest difference is in-app purchases: Matrix at none against Voltage Regulator's 1. Matrix also leads on update cadence (every 5 weeks vs every 9 months). Voltage Regulator's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15.1). On price and device support there is nothing between them.

Both are free to download. Voltage Regulator sells 1 one-off in-app purchase. Matrix asks for nothing beyond the download.

Voltage Regulator ships an update every 9 months, Matrix every 5 weeks. The most recent releases landed on September 16, 2026 and December 3, 2025 respectively.

## The numbers

| Metric | Voltage Regulator | Matrix |
| --- | --- | --- |
| 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 | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Monetization | Freemium | — |
| Size | 3 MB | 32 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## 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 |


### Matrix

[App page](https://appshunter.io/ios/app/matrix/id1619005601)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Voltage Regulator free?

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

### Is Matrix free?

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

### Do Voltage Regulator or Matrix have ads?

Matrix shows ads; Voltage Regulator does not.

### Which is updated more often, Voltage Regulator or Matrix?

Voltage Regulator ships an update every 9 months, and Matrix every 5 weeks. Most recently, Voltage Regulator was updated on September 16, 2026 and Matrix on December 3, 2025.

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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.*