# Linkding Web Extension vs CO2 on Watch & Lockscreen

The clearest difference is price: CO2 on Watch & Lockscreen at Free against Linkding Web Extension's $0.99. Linkding Web Extension's advantage is rating (5.0 vs 1.0) and in-app purchases (none vs 8). On ratings volume, ads and device support there is nothing between them.

CO2 on Watch & Lockscreen is free to download; Linkding Web Extension costs $0.99 up front. CO2 on Watch & Lockscreen sells 8 in-app purchases, starting at $1.99 per month. Linkding Web Extension asks for nothing beyond the download.

Linkding Web Extension holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

## The numbers

| Metric | Linkding Web Extension | CO2 on Watch & Lockscreen |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/linkding-web-extension/id6473717543/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/co2-on-watch-and-lockscreen/id6738605498/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 28 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Tuan Nguyen](https://appshunter.io/developer/1718974993) | [Kevin Floch](https://appshunter.io/developer/1772752224) |

## What reviewers say

### Linkding Web Extension

[App page](https://appshunter.io/ios/app/linkding-web-extension/id6473717543)

This Safari extension simplifies bookmarking by pre-populating your self-hosted Linkding service with the current URL. It offers an options page for server address customization and is easily enabled through iOS Settings.

**Highlights:** Pre-populates Linkding with current URL, Customizable server address, Easy enabling via iOS Settings, Opens Linkding page directly

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none


### CO2 on Watch & Lockscreen

[App page](https://appshunter.io/ios/app/co2-on-watch-and-lockscreen/id6738605498)

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:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CO2_Monthly | $1.99 | per month |
| CO2_Annually | $9.99 | per year |
| Small tip | $4.99 | one-time |
| Medium tip | $9.99 | one-time |
| CO2_Lifetime_Upgrade2 | $14.99 | one-time |
| Large tip | $19.99 | one-time |
| CO2_Lifetime | $24.99 | one-time |
| Extra large tip | $49.99 | one-time |


## Frequently asked questions

### Is Linkding Web Extension free?

Linkding Web Extension costs $0.99, with no in-app purchases.

### Is CO2 on Watch & Lockscreen free?

CO2 on Watch & Lockscreen is free to download, with in-app purchases available.

### Which has better reviews, Linkding Web Extension or CO2 on Watch & Lockscreen?

Linkding Web Extension is rated higher. Linkding Web Extension averages 5.0 out of 5 from 1 ratings, while CO2 on Watch & Lockscreen averages 1.0 from 2 ratings.

### Do Linkding Web Extension or CO2 on Watch & Lockscreen have ads?

Neither Linkding Web Extension nor CO2 on Watch & Lockscreen shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*