# O2Care vs Petrocon Engineers

The clearest difference is update cadence: O2Care at weekly against Petrocon Engineers's every 3 weeks. O2Care also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

O2Care ships an update weekly, Petrocon Engineers every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | O2Care | Petrocon Engineers |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Size | 43 MB | 40 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Greymore Tech](https://appshunter.io/developer/1547388766) | [Petrocon Engineers and Consultants](https://appshunter.io/developer/1838276287) |

## What reviewers say

### O2Care

[App page](https://appshunter.io/ios/app/o2care/id1597697368)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Petrocon Engineers

[App page](https://appshunter.io/ios/app/petrocon-engineers/id6756651042)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is O2Care free?

O2Care is free to download, with no in-app purchases.

### Is Petrocon Engineers free?

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

### Do O2Care or Petrocon Engineers have ads?

Neither O2Care nor Petrocon Engineers shows ads.

### Which is updated more often, O2Care or Petrocon Engineers?

O2Care ships an update weekly, and Petrocon Engineers every 3 weeks. Most recently, O2Care was updated on October 25, 2026 and Petrocon Engineers on October 24, 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.*