# Flow vs Allergy Plus by Pollen.com

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.

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.

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.

Flow ships an update monthly, Allergy Plus by Pollen.com every 3 weeks. The most recent releases landed on October 15, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Flow | Allergy Plus by Pollen.com |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (27 ratings)](https://appshunter.io/ios/app/flow-air-pollution-sensor/id1332618814/reviews) | **[4.8 (23K ratings)](https://appshunter.io/ios/app/allergy-plus-by-pollencom/id1556701665/reviews)** |
| Number of ratings | 27 | **23K** |
| Positive reviews | 19.0% of reviews | **47.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 69 MB | 65 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Plume Labs](https://appshunter.io/developer/950289242) | [IQVIA Inc.](https://appshunter.io/developer/376388241) |

## What reviewers say

### Flow

[App page](https://appshunter.io/ios/app/flow-air-pollution-sensor/id1332618814)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Allergy Plus by Pollen.com

[App page](https://appshunter.io/ios/app/allergy-plus-by-pollencom/id1556701665)

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:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $2.49 | per month |
| Seasonal Subscription | $6.99 | per 3 months |
| Annual Subscription | $24.99 | per year |

**What reviewers like**

- 🚀 Helpful for planning outdoor activities
- 👍 Accurate pollen forecasts
- 🗓️ Useful for tracking allergy symptoms
- 💡 Provides detailed allergy information
- 🗺️ Includes air quality data

**What reviewers complain about**

- 🐛 Inaccurate pollen data for some locations
- 🔍 Lacks customization options for specific allergies
- 💰 Expensive subscription model
- 📢 Intrusive ads in free version
- 🕰️ Slow performance on some devices

**Reported bugs**

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

**Requested features**

- 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


## Frequently asked 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 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*