Comparison

CO2 on Watch & Lockscreen vs Sam

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

Head to head
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/

About

Sam

Features
Read full description

Control your TV with ease. This app will turn your iPhone into a TV remote! Easily connect once and the app will remember your TV. Features: - Intuitive remote control. - Auto-detect your TV's on the same wifi network. - Auto-connect to your TV. - Launch and control your favorite apps. - Easy navigation through touchpad. - Smooth cursorpad and air mouse. - Type and Search through keyboard. How to Use: - Step 1: Ensure your phone and TV connect to the same Wi-Fi. Click Connect icon on the top right - Step 2: Choose and Connect to your TV on the phone screen - Step 3: You are ready to use. Try out every feature of our app!! Upgrade to Premium to remove ads and unlock all features: - You can choose a yearly subscription (with 3-day free trial) or a monthly subscription. – Payment will be charged to iTunes Account at confirmation of purchase (After free trial period if offered). – Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. – Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. – Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase. – Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Samsung Compatibility: Supports 2016+ models. Disclaimer: This application is NOT an official Samsung product and it is NOT associated with, endorsed by, or affiliated with Samsung Electronics in any way. It is a third-party tool crafted to offer users a convenient way to control their compatible devices. Terms of Use: https://sites.google.com/view/foragongroup-tvremote/terms-of-use Privacy Policy: https://sites.google.com/view/foragongroup-tvremote/privacy-policy

Screenshots

CO2 on Watch & Lockscreen4 screens
Sam4 screens

Verdict

The call

The clearest difference is iOS requirement: Sam at 13.0 against CO2 on Watch & Lockscreen's 17.6. On price, update cadence, ads and in-app purchases 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 and Sam sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

CO2 on Watch & Lockscreen ships an update weekly, Sam fortnightly. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

Scorecard1 real difference · 9 level
CO2 on Watch & Lockscreen versus Sam: the parameters behind the verdict, then further details
ParameterCO2 on Watch & LockscreenSam
PriceFreeFree
Rating1.0 (2 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings2 — better—
Update frequencyWeekly — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS17.613.0 — better
Further details — not scored
Size28 MB26 MB
Age rating4+4+
DeveloperKevin FlochHoa Truong

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
2 purchases

Sam

Subscriptions2
  • Monthly Premium$3.991 Month
  • Yearly Premium3 Days trial$6.991 Year

Questions

Is CO2 on Watch & Lockscreen free?
CO2 on Watch & Lockscreen is free to download, with in-app purchases available.
Is Sam free?
Sam is free to download, with in-app purchases available.
Do CO2 on Watch & Lockscreen or Sam have ads?
Neither CO2 on Watch & Lockscreen nor Sam shows ads.
Which is updated more often, CO2 on Watch & Lockscreen or Sam?
CO2 on Watch & Lockscreen ships an update weekly, and Sam fortnightly. Most recently, CO2 on Watch & Lockscreen was updated on October 30, 2026 and Sam on November 4, 2026.

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