Comparison

Oil4Green vs QR

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

Head to head
About

Oil4Green

Features
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Oil4Green es un sistema de monitorización en tiempo real, conectado al Internet de las cosas (IoT) que permite monitorizar en todo momento información ambiental como, temperaturas, humedad o dioxido de carbono, presentes en el ambiente.

About

QR

Features
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QR Scanner is a fast, reliable, and easy-to-use app for scanning and generating QR codes and barcodes. Scan all types of QR codes and barcodes in one step — simply open the app and point your camera at the code. If a QR code contains a URL, you can open it instantly in your browser. If the code contains text, the content is displayed right away. QR Scanner is more than just a scanner. It includes useful features such as scan history, allowing you to access your previous scans anytime. The app supports multiple code formats and lets you share scan results with a single tap. Key Features • Fast and accurate scanning of all QR codes and barcodes • Batch scanning — scan multiple codes continuously without interruption • Product information after barcode scan, when available • Scan QR codes and barcodes from images in your photo library • Built-in flashlight support for scanning in low-light conditions • Automatic saving of scan history • Supports all common QR code types: text, contact, email, product, SMS, URL, Wi-Fi, and more • Easily share scan results via social networks or other apps Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Oil4Green3 screens
QR4 screens

Verdict

The call

The clearest difference is in-app purchases: Oil4Green at none against QR's 2. Oil4Green also leads on ads (none vs shown) and iOS requirement (11.0 vs 18.6). QR's advantage is update cadence (daily vs every 17 months). On price and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. QR sells 2 in-app purchases, starting at $0.99 per month. Oil4Green asks for nothing beyond the download.

UpkeepUpdate frequency

Oil4Green ships an update every 17 months, QR daily. The most recent releases landed on September 16, 2026 and August 29, 2026 respectively.

Scorecard4 real differences · 2 level
Oil4Green versus QR: the parameters behind the verdict, then further details
ParameterOil4GreenQR
PriceFreeFree
Update frequencyEvery 17 monthsDaily — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better18.6
Further details — not scored
Size18 MB51 MB
Age rating4+4+
DeveloperDATA MONITORING S.L.Entertainment Apps MCHJ

In-app purchases

None

Oil4Green

No in-app purchases

2 purchases

QR

Subscriptions2
  • QR Scanner Premium Monthly$0.991 Month
  • QR Scanner Premium - Yearly$9.991 Year

Questions

Is Oil4Green free?
Oil4Green is free to download, with no in-app purchases.
Is QR free?
QR is free to download, with in-app purchases available.
Do Oil4Green or QR have ads?
QR shows ads; Oil4Green does not.
Which is updated more often, Oil4Green or QR?
Oil4Green ships an update every 17 months, and QR daily. Most recently, Oil4Green was updated on September 16, 2026 and QR on August 29, 2026.

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