# Voltage Regulator vs Digital Electronics Pro

The clearest difference is price: Voltage Regulator at Free against Digital Electronics Pro's $4.99. Voltage Regulator also leads on iOS requirement (12.0 vs 16.0). Digital Electronics Pro's advantage is in-app purchases (none vs 1) and update cadence (every 2 months vs every 9 months). On ads and device support there is nothing between them.

Voltage Regulator is free to download; Digital Electronics Pro costs $4.99 up front. Voltage Regulator sells 1 one-off in-app purchase. Digital Electronics Pro asks for nothing beyond the download.

Voltage Regulator ships an update every 9 months, Digital Electronics Pro every 2 months. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Voltage Regulator | Digital Electronics Pro |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| 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 | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Freemium | — |
| Size | 3 MB | 21 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [ALG Software Lab SIA](https://appshunter.io/developer/1650561236) |

## 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 |


### Digital Electronics Pro

[App page](https://appshunter.io/ios/app/digital-electronics-pro/id6478407802)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Voltage Regulator free?

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

### Is Digital Electronics Pro free?

Digital Electronics Pro costs $4.99, with no in-app purchases.

### Do Voltage Regulator or Digital Electronics Pro have ads?

Neither Voltage Regulator nor Digital Electronics Pro shows ads.

### Which is updated more often, Voltage Regulator or Digital Electronics Pro?

Voltage Regulator ships an update every 9 months, and Digital Electronics Pro every 2 months. Most recently, Voltage Regulator was updated on October 5, 2026 and Digital Electronics Pro on October 12, 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.*