Comparison

O2Quality vs 湿度計++

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Real-time AQI reporting
  • US and European AQI standards
  • Forecasts for 6 pollutants
  • 5-day pollutant forecasts
  • Color-coded risk levels
  • Pollutant concentration data
Features
Read 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。

About

湿度計++

Features
Read full description

【概要】 湿度計は、現在の湿度、屋外の温度、および不快指数を現在地に基づいて表示します。 表示データは近くの気象観測所から気象データを取得します。

Screenshots

O2Quality4 screens
湿度計++2 screens

Verdict

The call

The clearest difference is in-app purchases: O2Quality at none against 湿度計++'s 4. O2Quality also leads on ads (none vs shown). 湿度計++'s advantage is update cadence (monthly vs every 5 months) and iOS requirement (15.6 vs 27.0). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 湿度計++ sells 4 one-off in-app purchases. O2Quality asks for nothing beyond the download.

UpkeepUpdate frequency

O2Quality ships an update every 5 months, 湿度計++ monthly. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 4 level
O2Quality versus 湿度計++: the parameters behind the verdict, then further details
ParameterO2Quality湿度計++
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 5 monthsMonthly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS27.015.6 — better
Further details — not scored
Size11 MB62 MB
Age rating4+4+
DeveloperTomohiko Shimizuhidehiko aihara

In-app purchases

None

O2Quality

No in-app purchases

4 purchases

湿度計++

One-time4
  • Coffee (Regular)$0.49
  • アプリケーション開発者への応援募金$1.99
  • Coffee (Large)$1.99
Show 1 more
  • Cake Set$5.99

Questions

Is O2Quality free?
O2Quality is free to download, with no in-app purchases.
Is 湿度計++ free?
湿度計++ is free to download, with in-app purchases available.
Do O2Quality or 湿度計++ have ads?
湿度計++ shows ads; O2Quality does not.
Which is updated more often, O2Quality or 湿度計++?
O2Quality ships an update every 5 months, and 湿度計++ monthly. Most recently, O2Quality was updated on October 9, 2026 and 湿度計++ on October 14, 2026.

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