Comparison

CDC Yellow Book vs Travax

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

Head to head
About

CDC Yellow Book

Access the U.S. government's most current travel health guidelines, including vaccine recommendations and destination-specific advice. This app offers comprehensive information for staying healthy abroad, with features like search, notes, and favorites.

Highlights
  • Pre-travel vaccinations and preventative care
  • Destination-specific guidelines
  • Advice for travelers with specific health needs
  • Full text search
  • Custom notes and highlights
  • Reference maps, tables, and charts
Features
Read full description

**U.S. Government’s Most Current and Trusted Travel Health Guidelines** Preview, Buy, or Sign In using this app. FREE PREVIEW – Experience the Yellow Book to see the value of having trusted travel information when and where it's needed. ABOUT YELLOW BOOK The fully revised and updated 2020 CDC Yellow Book app delivers the U.S. government’s most current travel health guidelines, including pre-travel vaccine recommendations, destination-specific health advice, and easy-to-reference maps, tables, and charts. Authored by a team of the world’s most esteemed travel medicine experts, this app best codifies the U.S. Government’s latest travel guidelines to staying healthy anywhere in the world. Review dedicated topics on emerging infectious disease threats such as Zika, Ebola, and MERS, new cholera vaccine recommendations, updated guidance on the use of antibiotics to treat traveler’s diarrhea, special considerations for unique types of travel (i.e. wilderness expeditions, work-related travel, and studying abroad), and fully revised advice for specific destinations in international travel. FEATURES • Pre-travel vaccinations and preventative care • Destination specific guidelines with sections on Cuba and Burma • Advice for travelers with specific health needs (pregnant women, travelers with chronic illness, etc.) • Practical tips for last minute or resource limited travelers • Recommendations for air crews, humanitarian workers, missionaries, and others who provide care and support overseas • Easy to use reference maps, tables, and charts • Notes for making custom notes and highlights within entries • Full Text Search to find specific topics quickly • "Favorites" for bookmarking important topics EDITOR-IN-CHIEF: Gary W. Brunette Publisher: Oxford University Press Powered by: Unbound Medicine Unbound Privacy Policy: www.unboundmedicine.com/privacy Unbound Terms of Use: https://www.unboundmedicine.com/end_user_license_agreement

About

Travax

This app provides comprehensive travel medicine information, including destination-specific health risks, vaccine recommendations, and malaria prevention. It offers detailed country maps, cultural considerations, safety advice, and a library of over 100 travel health topics for research.

Highlights
  • Destination-specific medical summaries
  • Vaccine and malaria prevention recommendations
  • Traveler's diarrhea risk assessment
  • Searchable country maps
  • Cross-cultural and safety considerations
  • Extensive travel health library
  • Latest travel health bulletins
Features
Read full description

Travax puts the world of travel medicine at your fingertips in 3 sections: Destinations, Library, and What's New. Destinations provides an in-depth Medical Summary with carefully nuanced vaccine recommendations, detailed independently researched malaria prevention measures, assessment of travelers' diarrhea risk and effective medications, other important health risks, and medical care infrastructure assessment and access information. Detailed searchable country maps for malaria and yellow fever show where specific preventive measures are recommended, and elevation maps are included for countries with territory above 2,800 meters (9,200 feet). Additional country-specific documents include Cross-Cultural Considerations, an analysis of cultural conventions intended to help travelers avoid missteps and misunderstandings; Safety and Security, with important crime and safety information; a recap of Basic Protective Measures travelers should take; Hospitals, listing the locations and capabilities of medical facilities in key locations throughout the country. Library makes more than 100 travel health topics available for research with multiple document types available for many, including academic-quality provider summaries, traveler teaching sheets, and Travax Literature Watch Reviews (abstract, commentary, and conclusion for published articles selected for their impact on the practice of travel medicine or addition to the knowledge base). What's New shows current bulletins and provides a searchable 2-year history of updates to Travax information. Typical items include disease outbreak information (usually reported as Current Health Bulletins in the country Medical Summary), Current Safety Bulletins from the country Safety and Security page, updates to significant changes to destination-specific medical recommendations, and updates to Library articles and the addition of Literature Watch Reviews. Available for current subscribers of Travax.

Screenshots

CDC Yellow Book4 screens
Travax4 screens

Verdict

The call

The clearest difference is rating: Travax at 5.0 against CDC Yellow Book's 4.2. Travax also leads on in-app purchases (none vs 2) and update cadence (every 3 weeks vs every 17 months). CDC Yellow Book's advantage is ratings volume (69 vs 5). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CDC Yellow Book sells 1 one-off in-app purchase. Travax asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Travax holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: CDC Yellow Book has 69 ratings behind it against 5, so its average is the more settled of the two.

UpkeepUpdate frequency

CDC Yellow Book ships an update every 17 months, Travax every 3 weeks. The most recent releases landed on October 29, 2026 and October 7, 2026 respectively.

Scorecard5 real differences · 5 level
CDC Yellow Book versus Travax: the parameters behind the verdict, then further details
ParameterCDC Yellow BookTravax
PriceFreeFree
Rating4.2 (69 ratings)5.0 (5 ratings) — better
Positive reviews20.0% of reviews—
Number of ratings69 — better5
Update frequencyEvery 17 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size10 MB50 MB
Age rating17+17+
DeveloperUnbound Medicine, Inc.Shoreland, Inc.

Customer experience

CDC Yellow Book

All ratings69 ratings
Positive81.2%
Neutral1.4%
Negative17.4%
Written reviews10 reviews
Positive20.0%
Neutral0.0%
Negative80.0%

Travax

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

CDC Yellow Book

One-time1
  • CDC Yellow Book2 variants$29.99
None

Travax

No in-app purchases

Questions

Is CDC Yellow Book free?
CDC Yellow Book is free to download, with in-app purchases available.
Is Travax free?
Travax is free to download, with no in-app purchases.
Which has better reviews, CDC Yellow Book or Travax?
Travax is rated higher. CDC Yellow Book averages 4.2 out of 5 from 69 ratings, while Travax averages 5.0 from 5 ratings.
Do CDC Yellow Book or Travax have ads?
Neither CDC Yellow Book nor Travax shows ads.
Which is updated more often, CDC Yellow Book or Travax?
CDC Yellow Book ships an update every 17 months, and Travax every 3 weeks. Most recently, CDC Yellow Book was updated on October 29, 2026 and Travax on October 7, 2026.

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