Comparison

Flow vs Allergy Plus by Pollen.com

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

Head to head
About

Flow

This app visualizes air quality data collected by a personal sensor. It helps users understand their exposure to pollutants like PM2.5, PM10, NO2, and VOCs, offering insights to find cleaner air routes and identify pollution hotspots.

Highlights
  • Real-time pollution tracking (PM2.5, PM10, NO2, VOCs)
  • Personal exposure reports
  • Air Quality Index (AQI) monitoring
  • Clean air route finding
  • Pollution hotspot identification
  • Daily and live data analysis
Features
Read full description

!! -- You must have Flow, the personal air pollution sensor from Plume Labs, to use this app. For more information, please visit flow.plumelabs.com. -- !! !! -- Looking for our free air quality forecasting app? Search for ‘Plume Air Report’ on the App Store or visit air.plumelabs.com. -- !! *Escape pollution and dodge the smog!* The Flow companion app from Plume Labs collects and analyses the data taken from your Flow’s PM2.5, PM10, NO2 and VOC sensors and gives you beautiful, easy-to-read reports, maps, and graphs. *Ever feel trapped by air pollution?* Air quality, AQI index, smog levels: with Flow, you can find the best clean air commute, hunt down fresh air playgrounds, eliminate chemical hotspots in your home, and that’s just the beginning. *Did you know?* Wind and weather, humidity and heat, atmospheric pressure, and many other factors create clean air pockets in urban environments. In fact, air pollution levels change up to 8X from street to street in the city, and even more from room to room indoors! Flow gives you the information you need to stay healthy at home or on the go. *Stop guessing and start sensing!* A new study from top researchers at King’s College in London shows that, with good data, you can reduce your exposure to air pollution by as much as 50% by making small changes to your routine. ***Key Features*** Track your personal pollution exposure with live data and daily reports: Flow measures real-time concentrations of PM2.5, PM10, NO2 and VOCs, as well as the AQI air quality level to give you everything you need to understand your exposure and build healthy routines. Avoid the most polluted places: Flow tracks air pollution variations around you in real time, so you can find clean air. Flow fits seamlessly into your daily life: Whether you're cycling, running, out in the park with the kids, or relaxing at home. ***Flow in the press*** “I hope many people living in polluted cities will end up using Flow.” —Techcrunch

About

Allergy Plus by Pollen.com

This app provides location-specific, real-time allergy information, including forecasts for pollen, air quality, and weather. Users can receive notifications for allergy level changes and view 5-day forecasts. It offers in-depth details on local allergens and syncs with a leading allergy forecasting website.

Highlights
  • Location-specific allergy forecasts
  • Real-time air quality and weather
  • Allergy level change notifications
  • 5-day forecast comparison
  • In-depth allergen information
  • Syncs with Pollen.com
Features
Read full description

Allergy Plus is designed to improve how you understand and manage your allergies. Based on Pollen.com, an industry leading allergy forecasting website for the last 20 years, Allergy Plus provides location-specific, real time allergy information at your fingertips. · Get the latest allergy, air quality and weather forecasts across multiple locations · Receive notifications on forecasted allergy level changes in as many locations as you need · See a 5-day allergy and weather forecast side by side · Share forecasts easily to your friends and family · Review in-depth information on impactful allergens in your area · Completely synced with Pollen.com for the most accurate and up-to-date allergy information available Allergy Plus is a free app intended for your benefit. Currently for use in the continental US only. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Flow4 screens
Allergy Plus by Pollen.com4 screens

Verdict

The call

The clearest difference is rating: Allergy Plus by Pollen.com at 4.8 against Flow's 2.5. Allergy Plus by Pollen.com also leads on review sentiment (47% vs 19%) and ratings volume (23K vs 27). Flow's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, update cadence, device support and iOS requirement 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. Allergy Plus by Pollen.com sells 3 in-app purchases, starting at $2.49 per month. Flow asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Allergy Plus by Pollen.com holds the better App Store score, 4.8 against 2.5. That said, the two scores are not equally well evidenced: Allergy Plus by Pollen.com has 23K ratings behind it against 27, so its average is the more settled of the two. Written reviews point the same way: 19% of Flow's written reviews are positive against 47% of Allergy Plus by Pollen.com's.

UpkeepUpdate frequency

Flow ships an update monthly, Allergy Plus by Pollen.com every 3 weeks. The most recent releases landed on October 15, 2026 and October 20, 2026 respectively.

Scorecard6 real differences · 4 level
Flow versus Allergy Plus by Pollen.com: the parameters behind the verdict, then further details
ParameterFlowAllergy Plus by Pollen.com
PriceFreeFree
Rating2.5 (27 ratings)4.8 (23K ratings) — better
Positive reviews19.0% of reviews47.1% of reviews — better
Number of ratings2723K — better
Update frequencyMonthlyEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPod, Apple Watch — better
Requires iOS15.615.0 — better
Further details — not scored
Size69 MB65 MB
Age rating4+4+
DeveloperPlume LabsIQVIA Inc.

Customer experience

Flow

All ratings27 ratings
Positive33.3%
Neutral3.7%
Negative63.0%
Written reviews63 reviews
Positive19.0%
Neutral19.0%
Negative61.9%

Allergy Plus by Pollen.com

All ratings22,771 ratings
Positive95.4%
Neutral2.2%
Negative2.4%
Written reviews289 reviews
Positive47.1%
Neutral8.7%
Negative44.3%

Bugs and requests

Flow

Not enough reviews yet to summarise bugs or requests.

Allergy Plus by Pollen.com

Reported bugs

3 issues
  • Watch app not working for some users
  • Pollen data not updating correctly
  • Allergy diary feature not functioning properly

Requested features

4 requests
  • Add mold and dust allergy tracking
  • Improve Apple Watch app functionality
  • Provide more detailed allergy history tracking
  • Allow users to log their symptoms and triggers

In-app purchases

None

Flow

No in-app purchases

3 purchases

Allergy Plus by Pollen.com

Subscriptions3
  • Monthly Subscription$2.491 Month
  • Seasonal Subscription$6.993 Months
  • Annual Subscription$24.991 Year

Questions

Is Flow free?
Flow is free to download, with no in-app purchases.
Is Allergy Plus by Pollen.com free?
Allergy Plus by Pollen.com is free to download, with in-app purchases available.
Which has better reviews, Flow or Allergy Plus by Pollen.com?
Allergy Plus by Pollen.com is rated higher. Flow averages 2.5 out of 5 from 27 ratings, while Allergy Plus by Pollen.com averages 4.8 from 23K ratings.
Do Flow or Allergy Plus by Pollen.com have ads?
Allergy Plus by Pollen.com shows ads; Flow does not.
Which is updated more often, Flow or Allergy Plus by Pollen.com?
Flow ships an update monthly, and Allergy Plus by Pollen.com every 3 weeks. Most recently, Flow was updated on October 15, 2026 and Allergy Plus by Pollen.com on October 20, 2026.

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