# VN Air vs TestSheetReader

The clearest difference is iOS requirement: TestSheetReader at 12.0 against VN Air's 15.1. 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.

VN Air ships an update weekly, TestSheetReader every 6 days. The most recent releases landed on November 3, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | VN Air | TestSheetReader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vn-air/id1470224949/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 6 days** |
| Monetization | Free | — |
| Size | 14 MB | 40 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [NORTHEN CENTRE FOR ENVIRONMENTAL MONITORING -VIETNAM ENVIRONMENT ADMINISTRATION](https://appshunter.io/developer/1441284326) | [VU BONG](https://appshunter.io/developer/899026397) |

## What reviewers say

### VN Air

[App page](https://appshunter.io/ios/app/vn-air/id1470224949)

This app provides real-time air quality index (AQI) information from monitoring stations nationwide. It displays hourly and daily AQI, historical trends, and health recommendations based on air quality levels. Users can also select favorite monitoring stations and view air quality rankings.

**Highlights:** Real-time AQI data, Hourly and daily AQI display, Historical AQI charts, Health recommendations, Favorite station selection, Air quality rankings

**In-app purchases:** none


### TestSheetReader

[App page](https://appshunter.io/ios/app/testsheetreader/id6503208567)

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

**In-app purchases:** none


## Frequently asked questions

### Is VN Air free?

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

### Is TestSheetReader free?

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

### Do VN Air or TestSheetReader have ads?

Neither VN Air nor TestSheetReader shows ads.

### Which is updated more often, VN Air or TestSheetReader?

VN Air ships an update weekly, and TestSheetReader every 6 days. Most recently, VN Air was updated on November 3, 2026 and TestSheetReader on November 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*