O2Quality vs Safe Breath
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
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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。
Safe Breath
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This is an app that allows you to understand the state of the atmosphere at a glance. You can check the presence of pollution substances, including PM2.5, in the air at any time. As it provides real-time information, it is convenient to use. You can also get the temperature and humidity of any place in the world you like. Key features of the 'Safe Breath' app! - Design that shows the current state of air pollution at a glance - Displays the current amount of air pollutants - Choose your region from anywhere in the world This app is recommended for those with allergies or asthma, as it allows for accurate understanding of the current air pollution conditions. It is also useful for runners, athletes, and anyone else who exercises outdoors to check their conditions. Pollutants supported: - CO (Carbon Monoxide) - NO (Nitric Oxide) - NO2 (Nitrogen Dioxide) - O3 (Ozone) - SO2 (Sulfur Dioxide) - PM2.5 (Particulate Matter) - PM10 (Coarse Particles) - NH3 (Ammonia)
Screenshots
Verdict
The clearest difference is ads: O2Quality at none against Safe Breath's shown. Safe Breath's advantage is iOS requirement (11.0 vs 27.0). On price, 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.
| Parameter | O2Quality | Safe Breath |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 5 months | — |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 27.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Tomohiko Shimizu | Vida Apps Incorporated |
In-app purchases
O2Quality
No in-app purchases
Safe Breath
No in-app purchases







