Comparison

MRU4u vs OELCHECK 4.0

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

MRU4u

Control MRU Fluegas Monitoring Units remotely via Bluetooth. Transfer and store measured data on your smartphone or tablet, with options to export as CSV or email screenshots. View live data as text or charts, with customizable value displays.

Highlights
  • Bluetooth remote control
  • Live data display (text/chart)
  • Customizable data views
  • Data storage on device
  • CSV data export
  • Email data screenshots
Features
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Remote control of MRU Fluegas Monitoring Units via Bluetooth. Transfer to and storage of measured data on Smartphone and Tablet. Data export as CSV file or screenshot as an email attachment. Control the most important functions of your MRU unit with your iPhone or iPad. Measured data are shown live on the screen, either as text or as curve chart. Measured values to be indicated may be individually chosen by the user. Stored measuring data always comprise all possible values of the measuring unit. Measurements may be stored on the controlling unit, assigned to a heating facility and sent by mail.

About

OELCHECK 4.0

Features
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The OELCHECK App 4.0 is the tool for our customers that enables them to quickly and easily enter sample data, view laboratory reports and manage machine data - at any time, even offline! You can find more information here: https://en.oelcheck.com/app With OELCHECK 4.0, you can enter your lubricant and operating fluid sample data in four simple steps: 1. Scan your machine's QR code or select machine/component. 2. Scan the barcode (laboratory number) from your printed Sample Information Form. 3. Add information about the sample 4. Confirm with β€˜Send’. There is no need to fill in the Sample Information Form by hand. Simply tick the box β€˜Sample information provided online’ on the printed Sample Information Form and enclose it with your lubricant or operating fluid sample. Your advantages at a glance - Easier: The machine is recognized automatically. - Faster: You only need to add a few details. - More modern: The data is entered via smartphone without pen and paper. - More efficient: You optimize your use of the all-inclusive analysis sets. Features in the login area - Sample entry: Simply scan the machine QR code or use the machine search function - Offline mode: Enter the data offline and transfer it as soon as you are online again. - Sample status check: Call up the status of your samples. - Sample photo: You can add up to five photos to a sample. - Lab report: View your last lab report for a sample entered with the app. Don't have a QR code sticker for your machine yet? You can create and print machine QR codes yourself in your user account under LAB.REPORT. On request, we can also send you your QR codes as practical, oil- and weather-resistant QR code stickers. Simply give us a call on +49(0)8034-9047-250 or send us an e-mail to: sales@oelcheck.de. Attach the QR code sticker to your machine directly near the sampling point. To use the app you need: - All-inclusive analysis kit from OELCHECK (available at https://en.oelcheck.com/shop) - A free user account with LAB.REPORT - Supported languages: German, English Not yet an OELCHECK customer? Visit our website https://en.oelcheck.com to find out more about our test methods and our comprehensive range of all-inclusive analysis kits for the professional testing and evaluation of lubricants and operating fluids from a wide variety of applications.

Screenshots

MRU4u4 screens
OELCHECK 4.04 screens

Verdict

The call

The clearest difference is update cadence: MRU4u at every 5 weeks against OELCHECK 4.0's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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

UpkeepUpdate frequency

MRU4u ships an update every 5 weeks, OELCHECK 4.0 every 3 months. The most recent releases landed on June 9, 2026 and September 8, 2026 respectively.

Scorecard1 real difference Β· 7 level
MRU4u versus OELCHECK 4.0: the parameters behind the verdict, then further details
ParameterMRU4uOELCHECK 4.0
PriceFreeFree
Positive reviews16.7% of reviewsβ€”
Update frequencyEvery 5 weeks β€” betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeβ€”
DevicesiPhone, iPad, iPod β€” betteriPhone, iPod
Requires iOS15.015.0
Further details β€” not scored
Size136 MB24 MB
Age rating4+4+
DeveloperMRU MessgerΓ€te fΓΌr Rauchgase und Umweltschutz GmbHOELCHECK GmbH

In-app purchases

None

MRU4u

No in-app purchases

None

OELCHECK 4.0

No in-app purchases

Questions

Is MRU4u free?
MRU4u is free to download, with no in-app purchases.
Is OELCHECK 4.0 free?
OELCHECK 4.0 is free to download, with no in-app purchases.
Do MRU4u or OELCHECK 4.0 have ads?
Neither MRU4u nor OELCHECK 4.0 shows ads.
Which is updated more often, MRU4u or OELCHECK 4.0?
MRU4u ships an update every 5 weeks, and OELCHECK 4.0 every 3 months. Most recently, MRU4u was updated on June 9, 2026 and OELCHECK 4.0 on September 8, 2026.

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