# VisualDx vs CDC Vaccine Schedules

The clearest difference is rating: VisualDx at 4.4 against CDC Vaccine Schedules's 3.5. VisualDx also leads on review sentiment (84% vs 45%) and update cadence (fortnightly vs every 3 months). CDC Vaccine Schedules's advantage is in-app purchases (none vs 10). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. VisualDx sells 10 in-app purchases, starting at $39.99 per month. CDC Vaccine Schedules asks for nothing beyond the download.

VisualDx holds the better App Store score, 4.4 against 3.5. Both are backed by a comparable volume of ratings — 186 and 93 respectively. Written reviews point the same way: 84% of VisualDx's written reviews are positive against 45% of CDC Vaccine Schedules's.

VisualDx ships an update fortnightly, CDC Vaccine Schedules every 3 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | VisualDx | CDC Vaccine Schedules |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (186 ratings)](https://appshunter.io/ios/app/visualdx/id348177521/reviews)** | [3.5 (93 ratings)](https://appshunter.io/ios/app/cdc-vaccine-schedules/id875273858/reviews) |
| Number of ratings | **186** | 93 |
| Positive reviews | **84.3% of reviews** | 45.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Subscription | **Free** |
| Best chart rank | **#10** | — |
| Size | 220 MB | 8 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Logical Images](https://appshunter.io/developer/348177524) | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) |

## What reviewers say

### VisualDx

[App page](https://appshunter.io/ios/app/visualdx/id348177521)

**Currently charting:** #10 Top Grossing · Medical (US App Store)

This visual reference tool aids medical professionals in improving patient engagement and diagnostic accuracy. It utilizes AI and a vast image atlas to help build custom differentials, share patient-specific images, and access comprehensive diagnostic information. Earn continuing education credits while making better medical decisions.

**Highlights:** Build custom differentials, Engage patients with visual aids, Improve diagnostic accuracy, Access therapy and test options, Recognize infectious diseases, Earn CME credits

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Complete (1 Month) | $39.99 | per month |
| VisualDx Core Monthly | $39.99 | per month |
| Complete+DermExpert (1 Month) | $49.99 | per month |
| VisualDx Elite Monthly | $49.99 | per month |
| Add DermExpert (1 Year) | $99.99 | per year |
| Complete (1 Year) | $149.99 | per year |
| VisualDx Core Annual | $249.99 | per year |
| VisualDx Elite Annual | $299.99 | per year |
| Complete+DermExpert (1 Year) | $499.99 | per year |
| Complete (1 yr) | $399.99 | one-time |

**What reviewers like**

- 📸 Excellent clinical images and kodachromes
- 👍 User-friendly interface and easy navigation
- 🎓 Comprehensive differential diagnosis tool
- 📚 Detailed disease summaries and treatment information
- 🌍 Inclusive representation of skin of color

**What reviewers complain about**

- 💰 Expensive subscription cost
- ❌ Difficult subscription cancellation process
- 🐛 App crashes and performance issues
- 📱 Quiz feature laggy and unreliable
- 😤 Poor customer service responsiveness

**Reported bugs**

- App crashes when using quiz feature
- CME credit claiming functionality fails
- Subscription cancellation not processed
- Renewal charges despite cancellation requests
- Quiz unable to load properly

**Requested features**

- Make app free again (previously free)
- Simplify subscription cancellation in-app
- Improve quiz functionality for mobile
- Add quiz feature to desktop version
- Expand patient information handouts


### CDC Vaccine Schedules

[App page](https://appshunter.io/ios/app/cdc-vaccine-schedules/id875273858)

Provides healthcare professionals with quick access to CDC-recommended immunization schedules for all ages. Features include color-coded schedules, hyperlinked vaccine details, and catch-up schedules. Content is automatically updated when connected to ensure the latest information.

**Highlights:** Infant, child, and adolescent schedules, Adult immunization recommendations, Contraindications and precautions table, Color-coded schedule coordination, Hyperlinked dose specifics, Catch-up schedule guidance, Automatic content updates

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

**In-app purchases:** none

**What reviewers like**

- 👍 Handy reference for vaccine schedules
- 👍 Good for pharmacists
- 👍 Useful for NPs
- 👍 Informative for parents
- 👍 Quick and easy navigation

**What reviewers complain about**

- 🐛 Not updating to current recommendations
- 🐛 No longer valuable for vaccines
- 🐛 Dangerous and useless ordeal
- 🐛 Not user friendly
- 🐛 Poor app design

**Reported bugs**

- App not updating to current recommendations
- App stopped working
- App no longer loads
- App keeps crashing
- App freezes and cannot press home button

**Requested features**

- Update to current recommendations
- Include COVID and travel vaccines
- Separate guide for 65+
- Include adverse effects and package inserts
- Allow continuous symptom monitoring and reporting


## Frequently asked questions

### Is VisualDx free?

VisualDx is free to download, with in-app purchases available.

### Is CDC Vaccine Schedules free?

CDC Vaccine Schedules is free to download, with no in-app purchases.

### Which has better reviews, VisualDx or CDC Vaccine Schedules?

VisualDx is rated higher. VisualDx averages 4.4 out of 5 from 186 ratings, while CDC Vaccine Schedules averages 3.5 from 93 ratings.

### Do VisualDx or CDC Vaccine Schedules have ads?

Neither VisualDx nor CDC Vaccine Schedules shows ads.

### Which is updated more often, VisualDx or CDC Vaccine Schedules?

VisualDx ships an update fortnightly, and CDC Vaccine Schedules every 3 months. Most recently, VisualDx was updated on November 1, 2026 and CDC Vaccine Schedules on November 3, 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.*