# FreshAir Sensor vs Backpack Checklist

The clearest difference is update cadence: FreshAir Sensor at every 2 months against Backpack Checklist's every 6 months. Backpack Checklist's advantage is iOS requirement (10.0 vs 15.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

FreshAir Sensor ships an update every 2 months, Backpack Checklist every 6 months. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | FreshAir Sensor | Backpack Checklist |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/freshair-sensor/id1282065363/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free | — |
| Size | 72 MB | 29 MB |
| Requires iOS | 15.2 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FreshAir Sensor](https://appshunter.io/developer/1282065362) | [WEN-PIN WANG](https://appshunter.io/developer/1515022932) |

## What reviewers say

### FreshAir Sensor

[App page](https://appshunter.io/ios/app/freshair-sensor/id1282065363)

This application allows you to set up and manage your FreshAir nicotine monitoring device. View real-time smoking alerts and monitor device status directly from your smartphone.

**Highlights:** Install FreshAir nicotine monitoring device, View FreshAir smoking alerts, Monitor device status, Receive real-time notifications

**Features:** macOS Compatibility

**In-app purchases:** none


### Backpack Checklist

[App page](https://appshunter.io/ios/app/backpack-checklist/id1515741984)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FreshAir Sensor free?

FreshAir Sensor is free to download, with no in-app purchases.

### Is Backpack Checklist free?

Backpack Checklist is free to download, with no in-app purchases.

### Do FreshAir Sensor or Backpack Checklist have ads?

Neither FreshAir Sensor nor Backpack Checklist shows ads.

### Which is updated more often, FreshAir Sensor or Backpack Checklist?

FreshAir Sensor ships an update every 2 months, and Backpack Checklist every 6 months. Most recently, FreshAir Sensor was updated on October 6, 2026 and Backpack Checklist on October 5, 2026.

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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.*