ISD Link vs Aqi Qube
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ISD Link
This app allows interaction with various smart devices. It prioritizes user privacy by saving all data locally and not collecting personal information. Bluetooth is required for device scanning and connection.
- Smart device interaction
- Local data saving
- No account registration
- Bluetooth connectivity
- Supports numerous device models
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ISD Link is an APP specially designed for smart device interaction. 1. ISD Link does not have an account registration function, and all data on the device is saved locally and will not be uploaded to remote servers. It promises not to collect user information. 2. During use of ISD Link, Bluetooth needs to be turned on for device scanning and connection. 3.ISD Link supports the following devices: TESTV co-branded model PB25DW, TESTV co-branded model PB40, MAG20, PB70W, PB40, PB50DW, PB10DW, PB25DW, ZIP, Power200 series, EDGE, NP2GO, 608PD, A8Air, A4Air, Air8, C4Air, B80 /B60, K4, X16, K2Air, NP2Air, LP2Air.
Aqi Qube
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Aqi Qube is a comprehensive application designed to empower users with detailed insights into their immediate environment's air quality and atmospheric conditions using our IOT Device (Air Qube) The app presents a user-friendly interface displaying critical metrics such as PM1.0, PM2.5, PM4.0, and PM10, which represent different sizes of airborne particulate matter, measured in micrograms per cubic meter (μg/m 3 ). It also tracks relative humidity (RH%) and temperature ( ∘ F). Beyond physical parameters, Aqi Qube monitors key gaseous pollutants like Volatile Organic Compounds (VOC), Nitrogen Dioxides (NOX - in ppb), Carbon Dioxides (CO2 - in ppm), and Carbon Monoxide (CO - in ppm). The app clearly indicates the status ("DEVICE ONLINE") and the last update time, ensuring users have access to current data. Visual indicators, such as icons next to each parameter, provide quick assessments of the readings (e.g., green for good, orange/red for elevated levels). This app, "A Product of EIRX System, LLC USA," serves as an essential tool for individuals concerned about their indoor or outdoor air quality.
Screenshots
Verdict
The clearest difference is iOS requirement: Aqi Qube at 12.0 against ISD Link's 16.6. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ISD Link ships an update fortnightly, Aqi Qube every 9 days. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.
| Parameter | ISD Link | Aqi Qube |
|---|---|---|
| Price | Free | Free |
| Rating | 2.1 (26 ratings) — better | — |
| Positive reviews | 20.7% of reviews | — |
| Number of ratings | 26 — better | — |
| Update frequency | Fortnightly | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | 深圳艾斯特创新科技有限公司 | EIRX, LLC |
In-app purchases
ISD Link
No in-app purchases
Aqi Qube
No in-app purchases









