Comparison

Qnotes3 vs Airsensortool

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Qnotes3

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
Read full description

Qnotes 3 is designed to work with Notes Station 3 in a QNAP NAS with QTS 4.3 and above. It is a convenient note-taking tool for collecting ideas on your iOS device. Add a note by writing, recording audio, taking photos, and attaching files. Key features: - Take notes and sync with your QNAP NAS. - 3 tier structure: Notebook, Section, and notes. - Share with your notes. - Collaborative work with your friends

About

Airsensortool

Features
Read full description

App Description Overview: Our app wirelessly connects to the advanced smart sensor, allowing you to monitor environmental gas levels in real time. With precise measurements of CO, CO2, HCHO, and alcohol levels, you can stay informed about the air quality around you. Key Features: Real-Time Monitoring: Get instant readings of CO, CO2, HCHO, and alcohol concentration directly on your smartphone. Easy Connectivity: Simple connection to the smart sensor for hassle-free setup. User-Friendly Interface: Intuitive design with clear and concise data display for easy understanding. Portable and Versatile: Ideal for use in various settings. Note: The detection results from this product are for personal reference only. Always ensure proper ventilation and take necessary precautions when gas levels are high. Disclaimer: This device is not a medical instrument. The detection results cannot be used as a basis for disease diagnosis. If you experience any discomfort, please seek help from a doctor. App Store 产品描述: 智能传感器应用描述 概述:我们的应用与先进的智能传感器无线连接,让您可以随时了解周围的空气质量。 主要功能: 实时监测:在智能手机上直接获取CO、CO2、HCHO和酒精(气体)浓度的即时读数。界面友好:直观设计,清晰简洁。使用便携:适合在各种场所使用。 免责声明:此设备不是医疗器械。检测结果不能作为疾病诊断依据。如有身体任何不适,请寻求医生的帮助。

Screenshots

Qnotes34 screens
Airsensortool4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level
Qnotes3 versus Airsensortool: the parameters behind the verdict, then further details
ParameterQnotes3Airsensortool
PriceFreeFree
Rating1.7 (15 ratings) — better—
Positive reviews9.5% of reviews—
Number of ratings15 — better—
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size79 MB25 MB
Age rating4+4+
DeveloperQNAP Systems, Inc.Shenzhen Hanwei IoT Co., Ltd.

In-app purchases

None

Qnotes3

No in-app purchases

None

Airsensortool

No in-app purchases

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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