Comparison

O2Quality vs The Pollen Forecast Checker

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

The Pollen Forecast Checker

This app provides a clear and simple forecast of airborne pollen types and their quantities. It helps users with allergies take proactive measures to manage symptoms by displaying current and future pollen levels.

Highlights
  • Current pollen information by location
  • Pollen types and quantities displayed
  • 5-day pollen forecast
  • Visual indicators for pollen levels
  • Simple and clutter-free UI
Features
Read full description

The Pollen Forecast Checker is a simple yet high-quality Japanese-made app designed for people with pollen allergies. It clearly displays which types of pollen—such as cedar, cypress, or grass—are currently in the air and in what quantities. By checking the pollen levels before going out, the app helps you take proactive steps to reduce allergy symptoms. Features - Clear display of today's pollen information for your current location or selected area - Check the pollen levels by type (cedar, cypress, grass, etc.) - 5-day pollen forecast, including today, to help you plan ahead - Visual indicators such as “Very High,” “Moderate,” and “Low” make it easy to understand at a glance - Simple UI that immediately shows the necessary information when the app is opened Recommended For - Those who suffer from hay fever every year - People who want to prepare masks or glasses before going out - Parents looking to protect their young children from pollen - Commuters and students who want quick access to pollen info on their phone - Anyone who finds other pollen apps too cluttered or complex Usage Scenarios - Check pollen levels quickly while getting ready in the morning - Refer to the forecast when planning weekend activities - Check pollen status at your destination and prepare masks or medicine - Convenient for those who want to use over-the-counter medication only on severe days The Pollen Forecast Checker is designed to help you manage pollen allergies naturally in your daily life. No unnecessary features—just the essential information delivered smartly. If you're looking for a simple and reliable pollen app, give this one a try. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

O2Quality4 screens
The Pollen Forecast Checker3 screens

Verdict

The call

The clearest difference is in-app purchases: O2Quality at none against The Pollen Forecast Checker's 2. O2Quality also leads on ads (none vs shown). The Pollen Forecast Checker's advantage is iOS requirement (15.6 vs 27.0). On price, review sentiment, update cadence 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. The Pollen Forecast Checker sells 2 in-app purchases, starting at $3.99 per month. O2Quality asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

Scorecard4 real differences · 6 level
O2Quality versus The Pollen Forecast Checker: the parameters behind the verdict, then further details
ParameterO2QualityThe Pollen Forecast Checker
PriceFreeFree
Rating—4.5 (4 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—4 — better
Update frequencyEvery 4 monthsEvery 4 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, MaciPhone, iPad, iPod, Apple Watch — better
Requires iOS27.015.6 — better
Further details — not scored
Size11 MB67 MB
Age rating4+4+
DeveloperTomohiko ShimizuVida Apps Incorporated

Customer experience

O2Quality

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

The Pollen Forecast Checker

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

O2Quality

No in-app purchases

2 purchases

The Pollen Forecast Checker

Subscriptions2
  • Premium Plan - 1 Month$3.991 Month
  • Premium Plan - 3 Month$9.993 Months

Questions

Is O2Quality free?
O2Quality is free to download, with no in-app purchases.
Is The Pollen Forecast Checker free?
The Pollen Forecast Checker is free to download, with in-app purchases available.
Do O2Quality or The Pollen Forecast Checker have ads?
The Pollen Forecast Checker shows ads; O2Quality does not.
Which is updated more often, O2Quality or The Pollen Forecast Checker?
O2Quality ships an update every 4 months, and The Pollen Forecast Checker every 4 months. Most recently, O2Quality was updated on November 3, 2026 and The Pollen Forecast Checker on November 8, 2026.

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