# Электробезопасность тесты 4 г vs Ottor Mastar

The clearest difference is price: Ottor Mastar at Free against Электробезопасность тесты 4 г's $1.99. Электробезопасность тесты 4 г's advantage is iOS requirement (12.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Ottor Mastar is free to download; Электробезопасность тесты 4 г costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Электробезопасность тесты 4 г ships an update every 3 months, Ottor Mastar every 2 months. The most recent releases landed on October 14, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Электробезопасность тесты 4 г | Ottor Mastar |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 14 MB | 29 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 12+ |
| Developer | [Andrey Andreyev](https://appshunter.io/developer/1418253369) | [Albert Nikanorov](https://appshunter.io/developer/1870625344) |

## What reviewers say

### Электробезопасность тесты 4 г

[App page](https://appshunter.io/ios/app/4/id1523877055)

Prepare for your electrical safety exam with this comprehensive test simulator. It offers various modes to study questions, practice without limits, and simulate the real exam. Offline access ensures you can study anytime, anywhere.

**Highlights:** Study questions with correct answers, Unlimited practice mode, Simulated exam mode, Error correction feature, Offline access

**Features:** macOS Compatibility

**In-app purchases:** none


### Ottor Mastar

[App page](https://appshunter.io/ios/app/ottor-mastar/id6789648576)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Электробезопасность тесты 4 г free?

Электробезопасность тесты 4 г costs $1.99, with no in-app purchases.

### Is Ottor Mastar free?

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

### Do Электробезопасность тесты 4 г or Ottor Mastar have ads?

Neither Электробезопасность тесты 4 г nor Ottor Mastar shows ads.

### Which is updated more often, Электробезопасность тесты 4 г or Ottor Mastar?

Электробезопасность тесты 4 г ships an update every 3 months, and Ottor Mastar every 2 months. Most recently, Электробезопасность тесты 4 г was updated on October 14, 2026 and Ottor Mastar on October 31, 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.*