Comparison

CDC vs ReadyVax

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

Head to head
About

CDC

Access the latest health information and news directly from the official source. Organize your home screen to prioritize what matters most and receive real-time updates. Explore a variety of content including disease data, videos, podcasts, and journal articles.

Highlights
  • Up-to-date health information
  • Customizable home screen
  • Disease case counts
  • Videos and podcasts
  • Journal articles
  • Searchable web content
Features
Read full description

Get the official CDC Mobile application to access the most up to date health information. FILTERING OPTIONS Organize your home screen so that the information that’s most important to you appears first! Turn off the content you don’t want with just a flip of a switch and reset it all with the tap of a button. CONTENT The app ensures that you’re getting the most up to date health information. The home screen lets you see all your information in one place and updates whenever your device is connected to WI-FI. Enjoy a greater variety of content such as Image of the Week, disease case counts, videos, and podcasts to give you the most current health information from CDC. Browse the latest articles, stay on top of health news in the Newsroom section, and view CDC Images of the Week. If you’re a journal reader, view the latest Morbidity & Mortality Weekly Report, Emerging and Infectious Disease journal, or the latest on Preventing Chronic Diseases. You can even search CDC’s web content from the app. We'd love to hear your thoughts about the app! Rate the CDC Mobile App in the App Store or leave a comment to let us know how we're doing. You can even send us an email through the app if you have suggestions for improvements! DISCLAIMER THE MATERIALS EMBODIED IN THIS SOFTWARE ARE PROVIDED TO YOU "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESSED, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE CENTERS FOR DISEASE CONTROL AND PREVENTION (CDC) OR THE UNITED STATES (U.S.) GOVERNMENT BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR NOT CDC OR THE U.S. GOVERNMENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.

About

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.

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
Read 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.

Screenshots

CDC4 screens
ReadyVax4 screens

Verdict

The call

The clearest difference is review sentiment: ReadyVax at 75% against CDC's 22%. ReadyVax also leads on rating (4.4 vs 2.9). CDC's advantage is update cadence (monthly vs every 25 months) and ratings volume (413 vs 7). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ReadyVax holds the better App Store score, 4.4 against 2.9. That said, the two scores are not equally well evidenced: CDC has 413 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 22% of CDC's written reviews are positive against 75% of ReadyVax's.

UpkeepUpdate frequency

CDC ships an update monthly, ReadyVax every 25 months. The most recent releases landed on September 15, 2026 and September 14, 2026 respectively.

Scorecard4 real differences · 6 level
CDC versus ReadyVax: the parameters behind the verdict, then further details
ParameterCDCReadyVax
PriceFreeFree
Rating2.9 (413 ratings)4.4 (7 ratings) — better
Positive reviews22.5% of reviews75.0% of reviews — better
Number of ratings413 — better7
Update frequencyMonthly — betterEvery 25 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.614.0 — better
Further details — not scored
Size38 MB19 MB
Age rating12+17+
DeveloperCenters For Disease Control and PreventionEmory University

Customer experience

CDC

All ratings413 ratings
Positive45.0%
Neutral5.6%
Negative49.4%
Written reviews89 reviews
Positive22.5%
Neutral10.1%
Negative67.4%

ReadyVax

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

Bugs and requests

CDC

Reported bugs

3 issues
  • Links within articles not working
  • App freezing or not loading past the splash screen
  • Symptom checker and other features not functioning properly

Requested features

4 requests
  • Improved contact tracing tools
  • More up-to-date and comprehensive disease data
  • Better integration with other health apps and platforms
  • Landscape mode support for tablets

ReadyVax

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

CDC

No in-app purchases

None

ReadyVax

No in-app purchases

Questions

Is CDC free?
CDC is free to download, with no in-app purchases.
Is ReadyVax free?
ReadyVax is free to download, with no in-app purchases.
Which has better reviews, CDC or ReadyVax?
ReadyVax is rated higher. CDC averages 2.9 out of 5 from 413 ratings, while ReadyVax averages 4.4 from 7 ratings.
Do CDC or ReadyVax have ads?
Neither CDC nor ReadyVax shows ads.
Which is updated more often, CDC or ReadyVax?
CDC ships an update monthly, and ReadyVax every 25 months. Most recently, CDC was updated on September 15, 2026 and ReadyVax on September 14, 2026.

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