# OELCHECK 4.0 vs Esders Connect

The clearest difference is review sentiment: OELCHECK 4.0 at 33% against Esders Connect's 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.

OELCHECK 4.0 ships an update every 3 months, Esders Connect every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | OELCHECK 4.0 | Esders Connect |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **33.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 8 MB | 91 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [OELCHECK GmbH](https://appshunter.io/developer/1210793145) | [Esders GmbH](https://appshunter.io/developer/1569801608) |

## 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


### Esders Connect

[App page](https://appshunter.io/ios/app/esders-connect/id1569801606)

This app facilitates the management of measurement data from compatible devices. It allows users to wirelessly transfer readings via Bluetooth and mobile networks, generating PDF reports for easy documentation and access from any location.

**Highlights:** Bluetooth data transfer, Mobile network data transmission, PDF report generation, Paperless documentation, Secure data encryption, DSGVO compliant

**Features:** macOS Compatibility

**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 Esders Connect free?

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

### Do OELCHECK 4.0 or Esders Connect have ads?

Neither OELCHECK 4.0 nor Esders Connect shows ads.

### Which is updated more often, OELCHECK 4.0 or Esders Connect?

OELCHECK 4.0 ships an update every 3 months, and Esders Connect every 2 months. Most recently, OELCHECK 4.0 was updated on November 3, 2026 and Esders Connect on November 3, 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.*