# Voltage Regulator vs Resistors Parallel

The clearest difference is price: Voltage Regulator at Free against Resistors Parallel's $1.99. Voltage Regulator also leads on update cadence (every 9 months vs every 59 months). Resistors Parallel's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Voltage Regulator is free to download; Resistors Parallel costs $1.99 up front. Voltage Regulator sells 1 one-off in-app purchase. Resistors Parallel asks for nothing beyond the download.

Voltage Regulator ships an update every 9 months, Resistors Parallel every 59 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Voltage Regulator | Resistors Parallel |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| 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 59 months |
| Monetization | Freemium | — |
| Size | 3 MB | 259 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) |

## 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 |


### Resistors Parallel

[App page](https://appshunter.io/ios/app/resistors-parallel-edutech-era/id1552663387)

**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 Resistors Parallel free?

Resistors Parallel costs $1.99, with no in-app purchases.

### Do Voltage Regulator or Resistors Parallel have ads?

Neither Voltage Regulator nor Resistors Parallel shows ads.

### Which is updated more often, Voltage Regulator or Resistors Parallel?

Voltage Regulator ships an update every 9 months, and Resistors Parallel every 59 months. Most recently, Voltage Regulator was updated on November 4, 2026 and Resistors Parallel on November 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.*