CO2 on Watch & Lockscreen vs Sam
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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/
Sam
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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
Verdict
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
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.
CO2 on Watch & Lockscreen ships an update weekly, Sam fortnightly. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.
| Parameter | CO2 on Watch & Lockscreen | Sam |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (2 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Weekly — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 28 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Kevin Floch | Hoa Truong |
In-app purchases
CO2 on Watch & Lockscreen
- CO2_Monthly7 Days trial$3.991 Month
- CO2_Annually7 Days trial$29.991 Year
- Small tip$4.99
- Medium tip$9.99
- Large tip$19.99
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- CO2_Lifetime_Upgrade2$24.99
- CO2_Lifetime$49.99
- Extra large tip$49.99
Sam
- Monthly Premium$3.991 Month
- Yearly Premium3 Days trial$6.991 Year
Questions
Is CO2 on Watch & Lockscreen free?
Is Sam free?
Do CO2 on Watch & Lockscreen or Sam have ads?
Which is updated more often, CO2 on Watch & Lockscreen or Sam?
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