# Voltage Regulator vs iRobbie

The clearest difference is review sentiment: Voltage Regulator at 100% against iRobbie's 0%. Voltage Regulator also leads on price (Free vs $5.99) and rating (4.8 vs 3.0). iRobbie's advantage is in-app purchases (none vs 1) and update cadence (every 6 weeks vs every 9 months). On ads, device support and iOS requirement there is nothing between them.

Voltage Regulator is free to download; iRobbie costs $5.99 up front. Voltage Regulator sells 1 one-off in-app purchase. iRobbie asks for nothing beyond the download.

Voltage Regulator holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Voltage Regulator has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Voltage Regulator's written reviews are positive against 0% of iRobbie's.

Voltage Regulator ships an update every 9 months, iRobbie every 6 weeks. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Voltage Regulator | iRobbie |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/voltage-regulator/id1149145965/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/irobbie-a/id1478706096/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 weeks** |
| Monetization | **Freemium** | Paid |
| Size | 3 MB | 395 MB |
| Requires iOS | **12.0** | 12.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [MCV Palo Alto LLC](https://appshunter.io/developer/1453946438) |

## 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 |


### iRobbie

[App page](https://appshunter.io/ios/app/irobbie-a/id1478706096)

Enhance robotic projects with smartphone capabilities. Connect to Arduino, ESP32-CAM, or ESP8266 boards via Bluetooth or WiFi. Utilize object recognition, tracking, and voice control for interactive robot experiences.

**Highlights:** Object recognition and tracking, ESP32-CAM video surveillance, Voice and remote control, Touch screen joystick, Music playback (Xylophone)

**In-app purchases:** none


## Frequently asked questions

### Is Voltage Regulator free?

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

### Is iRobbie free?

iRobbie costs $5.99, with no in-app purchases.

### Which has better reviews, Voltage Regulator or iRobbie?

Voltage Regulator is rated higher. Voltage Regulator averages 4.8 out of 5 from 5 ratings, while iRobbie averages 3.0 from 1 ratings.

### Do Voltage Regulator or iRobbie have ads?

Neither Voltage Regulator nor iRobbie shows ads.

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

Voltage Regulator ships an update every 9 months, and iRobbie every 6 weeks. Most recently, Voltage Regulator was updated on October 24, 2026 and iRobbie on October 6, 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.*