# HD Thermometer ⊎ vs AirQualityMeter

The clearest difference is in-app purchases: AirQualityMeter at none against HD Thermometer ⊎'s 5. AirQualityMeter also leads on review sentiment (50% vs 37%). HD Thermometer ⊎'s advantage is update cadence (fortnightly vs every 3 months) and chart position (#126 vs unranked). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. HD Thermometer ⊎ sells 5 in-app purchases, starting at $0.99 per month. AirQualityMeter asks for nothing beyond the download.

HD Thermometer ⊎ ships an update fortnightly, AirQualityMeter every 3 months. The most recent releases landed on September 26, 2026 and September 1, 2026 respectively.

## The numbers

| Metric | HD Thermometer ⊎ | AirQualityMeter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (13K ratings)](https://appshunter.io/ios/app/hd-thermometer/id595482076/reviews)** | — |
| Number of ratings | **13K** | — |
| Positive reviews | 36.6% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Best chart rank | **#126** | — |
| Size | 48 MB | 8 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Christophe Pereira](https://appshunter.io/developer/1686588142) | [Yuta Endo](https://appshunter.io/developer/1621719139) |

## What reviewers say

### HD Thermometer ⊎

[App page](https://appshunter.io/ios/app/hd-thermometer/id595482076)

**Currently charting:** #126 Top Free · Weather (US App Store)

Displays the current temperature for your location using a weather service. Offers a clean, rustic interface and allows saving multiple locations. Not a true thermometer, it relies on external data for accuracy.

**Highlights:** Current location temperature display, Rustic style interface, Save multiple locations, Clean and easy to use, Auto-save feature

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Version, Monthly | $0.99 | per month |
| Premium Version, Yearly | $2.99 | per year |
| Premium features without ads | $1.99 | one-time |
| Premium features without ads | $2.99 | one-time |
| Premium features without ads | $5.99 | one-time |

**What reviewers like**

- ✅ Accurate
- 🚀 Simple and reliable
- 💻 Convenient for checking temperatures
- 🌍 Provides temperatures for multiple locations

**What reviewers complain about**

- 🚫 Does not measure indoor/room temperature
- 🤔 Relies on weather data rather than direct measurement
- 💰 Paid version required to remove ads
- 📍 Inaccurate location detection

**Reported bugs**

- Temperatures do not update when moving to a cooler/warmer location
- Paid version still shows ads

**Requested features**

- Add option to manually set location
- Implement direct temperature measurement for indoor use
- Allow rotation to landscape mode on tablets


### AirQualityMeter

[App page](https://appshunter.io/ios/app/airqualitymeter/id1660451275)

This app provides real-time air quality measurements and forecasts up to 24 hours in advance. It helps users manage their physical condition and prepare for allergies by notifying them of pollutants like PM2.5 and PM10. Location services enable automatic weather data acquisition for your current area.

**Highlights:** Real-time air pollutant notifications (PM2.5, PM10), 24-hour air pollution level forecast, Global coverage, Automatic location-based weather data, Allergy countermeasure information

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

**In-app purchases:** none


## Frequently asked questions

### Is HD Thermometer ⊎ free?

HD Thermometer ⊎ is free to download, with in-app purchases available.

### Is AirQualityMeter free?

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

### Do HD Thermometer ⊎ or AirQualityMeter have ads?

Both HD Thermometer ⊎ and AirQualityMeter show ads.

### Which is updated more often, HD Thermometer ⊎ or AirQualityMeter?

HD Thermometer ⊎ ships an update fortnightly, and AirQualityMeter every 3 months. Most recently, HD Thermometer ⊎ was updated on September 26, 2026 and AirQualityMeter on September 1, 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.*