# Qnotes3 vs Airsensortool

The clearest difference is iOS requirement: Airsensortool at 13.0 against Qnotes3's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Qnotes3 ships an update every 3 months, Airsensortool every 2 months. The most recent releases landed on October 17, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Qnotes3 | Airsensortool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.7 (15 ratings)](https://appshunter.io/ios/app/qnotes3/id1167374652/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 9.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 79 MB | 25 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [QNAP Systems, Inc.](https://appshunter.io/developer/355826923) | [Shenzhen Hanwei IoT Co., Ltd.](https://appshunter.io/developer/1744478550) |

## What reviewers say

### Qnotes3

[App page](https://appshunter.io/ios/app/qnotes3/id1167374652)

Capture ideas on your iOS device with this note-taking tool. Organize notes into notebooks, sections, and individual notes. Share and collaborate on your notes with others, syncing seamlessly with your QNAP NAS.

**Highlights:** Note-taking on iOS devices, Sync with QNAP NAS, 3-tier note structure, Share notes, Collaborative work

**In-app purchases:** none


### Airsensortool

[App page](https://appshunter.io/ios/app/airsensortool/id6502637498)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Qnotes3 free?

Qnotes3 is free to download, with no in-app purchases.

### Is Airsensortool free?

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

### Do Qnotes3 or Airsensortool have ads?

Neither Qnotes3 nor Airsensortool shows ads.

### Which is updated more often, Qnotes3 or Airsensortool?

Qnotes3 ships an update every 3 months, and Airsensortool every 2 months. Most recently, Qnotes3 was updated on October 17, 2026 and Airsensortool on October 13, 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.*