# Voltage Regulator vs Mountain Crane

The clearest difference is in-app purchases: Mountain Crane at none against Voltage Regulator's 1. Mountain Crane also leads on update cadence (every 3 weeks vs every 9 months) and rating (5.0 vs 4.8). Voltage Regulator's advantage is iOS requirement (12.0 vs 15.1). On price, review sentiment, ratings volume and ads there is nothing between them.

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

Mountain Crane holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 5 and 12 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Voltage Regulator ships an update every 9 months, Mountain Crane every 3 weeks. The most recent releases landed on October 21, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Voltage Regulator | Mountain Crane |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (5 ratings)](https://appshunter.io/ios/app/voltage-regulator/id1149145965/reviews) | **[5.0 (12 ratings)](https://appshunter.io/ios/app/mountain-crane/id6476885346/reviews)** |
| Number of ratings | 5 | **12** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | Freemium | **Free** |
| Size | 3 MB | 103 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) | [Mountain Crane](https://appshunter.io/developer/1728087685) |

## 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 |


### Mountain Crane

[App page](https://appshunter.io/ios/app/mountain-crane/id6476885346)

This app provides essential tools for mountain operations, including daily videos, incident reporting, and load charts. It also offers a message feature for reaching higher altitudes and access to certificates.

**Highlights:** Daily videos, Reach Higher Message, Incident Report Forms, Certificates, Load Charts

**Features:** macOS Compatibility, 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 Mountain Crane free?

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

### Which has better reviews, Voltage Regulator or Mountain Crane?

Mountain Crane is rated higher. Voltage Regulator averages 4.8 out of 5 from 5 ratings, while Mountain Crane averages 5.0 from 12 ratings.

### Do Voltage Regulator or Mountain Crane have ads?

Neither Voltage Regulator nor Mountain Crane shows ads.

### Which is updated more often, Voltage Regulator or Mountain Crane?

Voltage Regulator ships an update every 9 months, and Mountain Crane every 3 weeks. Most recently, Voltage Regulator was updated on October 21, 2026 and Mountain Crane on October 14, 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.*