ReadyVax vs Houston Pollen and Mold
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ReadyVax
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.
- Up-to-date vaccine recommendations
- Vaccine safety profiles
- Disease prevention information
- Real-time alerts and updates
- Customizable data presentation
- Offline access to information
Read full descriptionHide full description
There is a lot of information available about vaccines and vaccination, and there are many mobile apps related to vaccines. However, there are few apps designed by trusted academic experts that can be rapidly updated for both routine use and emergency situations, such as outbreaks. ReadyVax is a new app that contains up-to-date information about vaccines and vaccination. With regularly updated data on vaccine recommendations and vaccine safety, and the ability to notify users in real-time of important vaccine information, ReadyVax is your trusted source for evidence-based information about vaccines. We have designed ReadyVax to be used by both health care providers and health care users, and users can customize the presentation of data, with a single click, to suit their information needs. Every time you start the app, the latest information is downloaded into your copy. This information will be accessible even if you lose network connectivity. The ReadyVax team constantly monitors vaccine recommendations to make sure the most up-to-date information is there for you. Key features of ReadyVax: -For every vaccine, we have documented who should get the vaccine, the recommended schedule and the safety profile. -Descriptions of the diseases prevented by these vaccines. -Answers to frequently asked questions about vaccines and vaccine safety. -Real-time breaking news alerts and updates about vaccines and vaccine-preventable diseases. -Links to resources about vaccines, vaccine safety, and vaccine recommendations from trusted sources. -One-click customization of information for health care users or health care providers.
Houston Pollen and Mold
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.
- 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
Read full descriptionHide full description
Houston Pollen and Mold is the local allergen tracker built just for Houston. Get today's tree, grass, weed, and mold counts straight from the City of Houston Health Department's pollen station — in a clean, fast app. See today's levels at a glance, then dig into the exact species driving them — oak, ragweed, cedar, mold, and more. Compare this season to previous years with clear 60-day and multi-year trend charts. WHAT YOU GET • Today's levels for Trees, Grass, Weeds, and Mold • Per-species breakdown — know which allergen is actually spiking • 60-day and multi-year trends (this year vs. the typical range) • Push alerts when your chosen allergens hit Heavy or higher • Symptom tracker — mark the days you feel congested or sneezy, and the app surfaces which allergens ran highest on your bad days (kept on your device) • Works offline — your latest reading is saved locally Pollen and mold data is sourced from the City of Houston Health Department and typically updates on weekday mornings. Informational use only — not medical advice. For diagnosis or treatment, see an allergist.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | ReadyVax | Houston Pollen and Mold |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 75.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 — better | 1 |
| Update frequency | Every 25 months | Every 11 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 19 MB | 31 MB |
| Age rating | 17+ | 4+ |
| Developer | Emory University | Baby Dog Asset Management Incorporated |
Customer experience
ReadyVax
Houston Pollen and Mold
In-app purchases
ReadyVax
No in-app purchases
Houston Pollen and Mold
No in-app purchases








