O2Quality vs AirQualityMeter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O2Quality
Provides real-time air quality information based on US and European Air Quality Index (AQI) standards. It forecasts pollutant levels for up to five days, including carbon monoxide, ozone, nitrogen dioxide, sulfur dioxide, PM2.5, and PM10.
- Real-time AQI reporting
- US and European AQI standards
- Forecasts for 6 pollutants
- 5-day pollutant forecasts
- Color-coded risk levels
- Pollutant concentration data
Read full descriptionHide full description
O2Qualityは、いまいる場所の大気汚染の状況を、いまいる場所の大気汚染の状況を、米国大気質指数と欧州大気質指数が定める空気質指数(AQI)と、お近くにある観測地点の一酸化炭素など6種類の予報をお伝えするアプリです。 ※ O2QualityはWeather data by Open-Meteo.comのデータを利用しています。All data is provided as is without any warranty. ※ 日本国内では、いまいる場所の最寄りに大気汚染を測定する装置が必要十分な数だけ設置されていないエリアがあると考えられます。 [ 空気質指数(AQI)を分かりやすくにお伝えします ] 米国大気質指数と欧州大気質指数が定める10段階の空気質指数(AQI)を、危険度の段階を表す数字と概要、そして危険度を表す色でお伝えします。 [ 6種類の汚染物質の指数をお伝えします ] 一酸化炭素(Carbon Monoxide)、オゾン(Ozone)、二酸化窒素(Nitrogen dioxide)、二酸化硫黄(Sulphur dioxide)、PM2.5、PM10といった汚染物質を対象に、およそ5日間の予報値をお伝えします。 [ 6種類の汚染物質の濃度をお伝えします ] 一酸化炭素(Carbon Monoxide)、オゾン(Ozone)、二酸化窒素(Nitrogen dioxide)、二酸化硫黄(Sulphur dioxide)、PM2.5、PM10といった汚染物質を対象に、およそ5日間の予報値をお伝えします。
AirQualityMeter
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.
- Real-time air pollutant notifications (PM2.5, PM10)
- 24-hour air pollution level forecast
- Global coverage
- Automatic location-based weather data
- Allergy countermeasure information
Read full descriptionHide full description
We will inform you of the measurement of the air environment (air pollution) and the forecast up to 24 hours ahead. Please use it for daily physical condition management and allergy countermeasures. (If you enable location information, the weather information for your current location will be obtained automatically.) -Notify air pollutants such as PM2.5 and PM10 in real time! -You can check the air pollution level forecast up to 24 days later. -Can be used all over the world! You can use it in the same way outside your country of residence -Acquire real-time weather data from OpenWeatherMap
Screenshots
Verdict
The clearest difference is review sentiment: O2Quality at 100% against AirQualityMeter's 50%. O2Quality also leads on ads (none vs shown) and monetization model (free vs ad-supported). AirQualityMeter's advantage is iOS requirement (16.6 vs 27.0). On price, update cadence, in-app purchases and device support 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.
O2Quality ships an update every 5 months, AirQualityMeter every 3 months. The most recent releases landed on September 22, 2026 and September 1, 2026 respectively.
| Parameter | O2Quality | AirQualityMeter |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Update frequency | Every 5 months | Every 3 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 27.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 11 MB | 8 MB |
| Age rating | 4+ | 12+ |
| Developer | Tomohiko Shimizu | Yuta Endo |
Customer experience
O2Quality
AirQualityMeter
In-app purchases
O2Quality
No in-app purchases
AirQualityMeter
No in-app purchases
Questions
Is O2Quality free?
Is AirQualityMeter free?
Do O2Quality or AirQualityMeter have ads?
Which is updated more often, O2Quality or AirQualityMeter?
Other comparisons















