# Промышленная безопасность Б2.1 vs PreventAge

The clearest difference is price: PreventAge at Free against Промышленная безопасность Б2.1's $1.99. PreventAge also leads on update cadence (every 9 days vs every 6 months). Промышленная безопасность Б2.1's advantage is iOS requirement (12.0 vs 15.1). On ads, in-app purchases and device support there is nothing between them.

PreventAge is free to download; Промышленная безопасность Б2.1 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Промышленная безопасность Б2.1 ships an update every 6 months, PreventAge every 9 days. The most recent releases landed on September 8, 2026 and June 26, 2026 respectively.

## The numbers

| Metric | Промышленная безопасность Б2.1 | PreventAge |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 9 days** |
| Monetization | Paid | — |
| Size | 14 MB | 36 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Andrey Andreyev](https://appshunter.io/developer/1418253369) | [MIIPAM, OOO](https://appshunter.io/developer/1895339968) |

## What reviewers say

### Промышленная безопасность Б2.1

[App page](https://appshunter.io/ios/app/21/id1528305009)

Prepare for certification exams in oil and gas industry operations with this comprehensive test simulator. It offers various training modes, including practice tests and an exam simulation, all offline.

**Highlights:** Test simulator for oil and gas operations, Offline access, Multiple training modes, Exam simulation, Error correction feature, Official test questions

**Features:** macOS Compatibility

**In-app purchases:** none


### PreventAge

[App page](https://appshunter.io/ios/app/preventage/id6763492388)

**In-app purchases:** none


## Frequently asked questions

### Is Промышленная безопасность Б2.1 free?

Промышленная безопасность Б2.1 costs $1.99, with no in-app purchases.

### Is PreventAge free?

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

### Do Промышленная безопасность Б2.1 or PreventAge have ads?

Neither Промышленная безопасность Б2.1 nor PreventAge shows ads.

### Which is updated more often, Промышленная безопасность Б2.1 or PreventAge?

Промышленная безопасность Б2.1 ships an update every 6 months, and PreventAge every 9 days. Most recently, Промышленная безопасность Б2.1 was updated on September 8, 2026 and PreventAge on June 26, 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.*