# OAService vs Oil Sample Analysis

The clearest difference is iOS requirement: OAService at 11.0 against Oil Sample Analysis's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

OAService ships an update every 3 months, Oil Sample Analysis every 2 months. The most recent releases landed on October 19, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | OAService | Oil Sample Analysis |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 36 MB | 41 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [©2021 Al Mulla Motors. All Rights Reserved.](https://appshunter.io/developer/1597690229) | [Shell Information Technology International B.V.](https://appshunter.io/developer/410842826) |

## What reviewers say

### OAService

[App page](https://appshunter.io/ios/app/oaservice/id1459846611)

**Features:** macOS Compatibility

**In-app purchases:** none


### Oil Sample Analysis

[App page](https://appshunter.io/ios/app/oil-sample-analysis/id1575505655)

**In-app purchases:** none


## Frequently asked questions

### Is OAService free?

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

### Is Oil Sample Analysis free?

Oil Sample Analysis is free to download, with no in-app purchases.

### Do OAService or Oil Sample Analysis have ads?

Neither OAService nor Oil Sample Analysis shows ads.

### Which is updated more often, OAService or Oil Sample Analysis?

OAService ships an update every 3 months, and Oil Sample Analysis every 2 months. Most recently, OAService was updated on October 19, 2026 and Oil Sample Analysis on October 30, 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.*