Comparison

MT Refinish vs CO2 on Watch & Lockscreen

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

Head to head
About

MT Refinish

Features
Read full description

Is it possible to manage your refinish jobs/formulas through the mobile APP? Of course you can! "MT Refinish" IOS APP is intended to demostrate the Job/formula management capabilities of the RPA series refinish scale from METTLER TOLEDO, you can easily push formulas from a mobile phone directly to the scale via Bluetooth or Wi-fi, delivering step-by-step guidance to ensure easy and error-free paint mixing.

About

CO2 on Watch & Lockscreen

Monitor CO2 levels from compatible devices directly on your Apple Watch and iPhone Lock Screen. Receive smart alerts and view real-time air quality data with color-coded visuals for quick understanding.

Highlights
  • Apple Watch complications with history graph
  • iPhone Lock Screen widgets
  • Customizable CO2 threshold alerts
  • Background monitoring
  • Live Activity for real-time data
  • Color-coded air quality visuals
Features
Read full description

Enhance your Aranet4, Airvalent or Inkbird IAM-T1 monitoring experience with an app focused on Apple Watch integration and Lock Screen widgets. (this is a companion app focusing on Apple Watch integration and Lock Screen visibility; for the original features, please use the official apps). KEY FEATURES: - Apple Watch Integration: Monitor CO₂ levels directly from your wrist with multiple complication styles (including a 3hr history graph) - Lock Screen Widgets: Keep CO₂ readings visible at all times on your iPhone - Smart Alerts: Customizable CO₂ threshold notifications - Background Monitoring: Continuous tracking even when the app isn't active - Live activity: for real-time monitoring - Color-coded Visuals: Quick understanding of air quality status DEVICE COMPATIBILITY: - Works with Aranet4, Airvalent and Inkbird IAM-T1 devices. The app is free to test and connect to your device, with in-app purchases available for premium features. This app is licensed under the standard Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

MT Refinish4 screens
CO2 on Watch & Lockscreen4 screens

Verdict

The call

The clearest difference is in-app purchases: MT Refinish at none against CO2 on Watch & Lockscreen's 8. MT Refinish also leads on iOS requirement (11.0 vs 17.6). CO2 on Watch & Lockscreen's advantage is update cadence (weekly vs every 4 months). On price, ads 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. CO2 on Watch & Lockscreen sells 8 in-app purchases, starting at $3.99 per month. MT Refinish asks for nothing beyond the download.

UpkeepUpdate frequency

MT Refinish ships an update every 4 months, CO2 on Watch & Lockscreen weekly. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 7 level
MT Refinish versus CO2 on Watch & Lockscreen: the parameters behind the verdict, then further details
ParameterMT RefinishCO2 on Watch & Lockscreen
PriceFreeFree
Rating—1.0 (2 ratings) — better
Positive reviews—50.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 4 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS11.0 — better17.6
Further details — not scored
Size16 MB28 MB
Age rating4+4+
DeveloperMETTLER-TOLEDO TECHNOLOGIES CHINA CO., LTD.Kevin Floch

In-app purchases

None

MT Refinish

No in-app purchases

8 purchases

CO2 on Watch & Lockscreen

Subscriptions2
  • CO2_Monthly7 Days trial$3.991 Month
  • CO2_Annually7 Days trial$29.991 Year
One-time6
  • Small tip$4.99
  • Medium tip$9.99
  • Large tip$19.99
Show 3 more
  • CO2_Lifetime_Upgrade2$24.99
  • CO2_Lifetime$49.99
  • Extra large tip$49.99

Questions

Is MT Refinish free?
MT Refinish is free to download, with no in-app purchases.
Is CO2 on Watch & Lockscreen free?
CO2 on Watch & Lockscreen is free to download, with in-app purchases available.
Do MT Refinish or CO2 on Watch & Lockscreen have ads?
Neither MT Refinish nor CO2 on Watch & Lockscreen shows ads.
Which is updated more often, MT Refinish or CO2 on Watch & Lockscreen?
MT Refinish ships an update every 4 months, and CO2 on Watch & Lockscreen weekly. Most recently, MT Refinish was updated on November 7, 2026 and CO2 on Watch & Lockscreen on November 4, 2026.

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