# OELCHECK 4.0 vs MaintMaster CMMS

The clearest difference is update cadence: OELCHECK 4.0 at every 3 months against MaintMaster CMMS's every 13 months. MaintMaster CMMS's advantage is iOS requirement (12.4 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.

OELCHECK 4.0 ships an update every 3 months, MaintMaster CMMS every 13 months. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | OELCHECK 4.0 | MaintMaster CMMS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 13 months |
| Monetization | Free | — |
| Size | 24 MB | 0 MB |
| Requires iOS | 15.0 | **12.4** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [OELCHECK GmbH](https://appshunter.io/developer/1210793145) | [MaintMaster Systems AB](https://appshunter.io/developer/1121513318) |

## 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


### MaintMaster CMMS

[App page](https://appshunter.io/ios/app/maintmaster-cmms/id1496735177)

**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 MaintMaster CMMS free?

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

### Do OELCHECK 4.0 or MaintMaster CMMS have ads?

Neither OELCHECK 4.0 nor MaintMaster CMMS shows ads.

### Which is updated more often, OELCHECK 4.0 or MaintMaster CMMS?

OELCHECK 4.0 ships an update every 3 months, and MaintMaster CMMS every 13 months. Most recently, OELCHECK 4.0 was updated on October 9, 2026 and MaintMaster CMMS on October 2, 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.*