# ReadyVax vs Houston Pollen and Mold

The clearest difference is rating: Houston Pollen and Mold at 5.0 against ReadyVax's 4.4. Houston Pollen and Mold also leads on update cadence (every 11 days vs every 25 months) and review sentiment (100% vs 75%). ReadyVax's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Houston Pollen and Mold holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: ReadyVax has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of ReadyVax's written reviews are positive against 100% of Houston Pollen and Mold's.

ReadyVax ships an update every 25 months, Houston Pollen and Mold every 11 days. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ReadyVax | Houston Pollen and Mold |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (7 ratings)](https://appshunter.io/ios/app/readyvax/id957851259/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/houston-pollen-and-mold/id6778218321/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 25 months | **Every 11 days** |
| Monetization | **Free** | Ad-supported |
| Size | 19 MB | 31 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Emory University](https://appshunter.io/developer/387102326) | [Baby Dog Asset Management Incorporated](https://appshunter.io/developer/6772790294) |

## What reviewers say

### ReadyVax

[App page](https://appshunter.io/ios/app/readyvax/id957851259)

Provides up-to-date, evidence-based information on vaccines and vaccination schedules. Designed for both healthcare professionals and general users, it offers customizable data views and real-time alerts for important updates.

**Highlights:** Up-to-date vaccine recommendations, Vaccine safety profiles, Disease prevention information, Real-time alerts and updates, Customizable data presentation, Offline access to information

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Houston Pollen and Mold

[App page](https://appshunter.io/ios/app/houston-pollen-and-mold/id6778218321)

Track local allergen counts for trees, grass, weeds, and mold in Houston. See daily levels, species breakdowns, and historical trends. Receive alerts for high allergen counts and log your symptoms to identify triggers.

**Highlights:** Daily pollen and mold counts, Per-species allergen breakdown, 60-day and multi-year trend charts, Push alerts for high allergens, Symptom tracker, Offline functionality

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ReadyVax free?

ReadyVax is free to download, with no in-app purchases.

### Is Houston Pollen and Mold free?

Houston Pollen and Mold is free to download, with no in-app purchases.

### Which has better reviews, ReadyVax or Houston Pollen and Mold?

Houston Pollen and Mold is rated higher. ReadyVax averages 4.4 out of 5 from 7 ratings, while Houston Pollen and Mold averages 5.0 from 1 ratings.

### Do ReadyVax or Houston Pollen and Mold have ads?

Houston Pollen and Mold shows ads; ReadyVax does not.

### Which is updated more often, ReadyVax or Houston Pollen and Mold?

ReadyVax ships an update every 25 months, and Houston Pollen and Mold every 11 days. Most recently, ReadyVax was updated on November 1, 2026 and Houston Pollen and Mold on November 5, 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.*