# OELCHECK 4.0 vs SGS Sample Tracking

OELCHECK 4.0 and SGS Sample Tracking are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 9, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | OELCHECK 4.0 | SGS Sample Tracking |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | — |
| Size | 24 MB | 55 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [OELCHECK GmbH](https://appshunter.io/developer/1210793145) | [SGS Group Management SA](https://appshunter.io/developer/644270853) |

## What reviewers say

### OELCHECK 4.0

[App page](https://appshunter.io/ios/app/oelcheck-40/id1474067028)

Streamline lubricant and operating fluid sample management. Easily enter data, view lab reports, and manage machine information anytime, even offline. Optimize your analysis kits with this efficient digital tool.

**Highlights:** Sample data entry via QR code or machine search, Offline data entry and online synchronization, View sample status and lab reports, Attach up to five photos per sample, Manage machine data, Optimized analysis kit usage

**Features:** macOS Compatibility

**In-app purchases:** none


### SGS Sample Tracking

[App page](https://appshunter.io/ios/app/sgs-sample-tracking/id6443736239)

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

**In-app purchases:** none


## Frequently asked questions

### Is OELCHECK 4.0 free?

OELCHECK 4.0 is free to download, with no in-app purchases.

### Is SGS Sample Tracking free?

SGS Sample Tracking is free to download, with no in-app purchases.

### Do OELCHECK 4.0 or SGS Sample Tracking have ads?

Neither OELCHECK 4.0 nor SGS Sample Tracking shows ads.

### Which is updated more often, OELCHECK 4.0 or SGS Sample Tracking?

OELCHECK 4.0 ships an update every 3 months, and SGS Sample Tracking every 3 months. Most recently, OELCHECK 4.0 was updated on October 9, 2026 and SGS Sample Tracking on October 21, 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.*