# CO2 sensor vs Phone Tracker

The clearest difference is in-app purchases: CO2 sensor at none against Phone Tracker's 6. CO2 sensor also leads on device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Phone Tracker sells 6 in-app purchases, starting at $7.99 per 7 days. CO2 sensor asks for nothing beyond the download.

## The numbers

| Metric | CO2 sensor | Phone Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (3 ratings)](https://appshunter.io/ios/app/co2-sensor/id1643286074/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | — |
| Monetization | Free | — |
| Size | 0 MB | 43 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [sighmon](https://appshunter.io/developer/377815161) | [Noir LLC](https://appshunter.io/developer/1798760868) |

## What reviewers say

### CO2 sensor

[App page](https://appshunter.io/ios/app/co2-sensor/id1643286074)

Monitor CO2, temperature, and humidity levels in real-time using a Bluetooth sensor. Save readings with location data and sync them across Apple devices via iCloud. View historical data on a map.

**Highlights:** Real-time CO2, temperature, and humidity readings, Bluetooth sensor integration, Save readings with location, iCloud sync across devices, Map view of saved readings, Open source code available

**In-app purchases:** none


### Phone Tracker

[App page](https://appshunter.io/ios/app/phone-tracker-find-device/id6749084712)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited weekly subscription | $7.99 | per 7 days |
| Unlimited weekly subscription | $9.99 | per 7 days |
| Unlimited monthly subscription | $16.99 | per month |
| Unlimited monthly subscription | $19.99 | per month |
| Unlimited yearly subscription | $79.99 | per year |
| Unlimited yearly subscription | $104.99 | per year |


## Frequently asked questions

### Is CO2 sensor free?

CO2 sensor is free to download, with no in-app purchases.

### Is Phone Tracker free?

Phone Tracker is free to download, with in-app purchases available.

### Do CO2 sensor or Phone Tracker have ads?

Neither CO2 sensor nor Phone Tracker 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.*