Comparison

NIH BMI Calculator vs CDC

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

Head to head
About

NIH BMI Calculator

This tool helps screen for weight categories that may indicate potential health problems. It provides a fully functioning Body Mass Index calculator directly on your phone, along with access to valuable health resources.

Highlights
  • Body Mass Index calculation
  • Weight category screening
  • Access to NHLBI health resources
  • Downloadable phone application
Features
Read full description

The National Heart, Lung, and Blood Institute’s BMI (Body Mass Index) calculator is a useful tool to screen for weight categories that may lead to health problems. The downloadable phone application puts the fully functioning calculator right on your phone, along with links to resources on the NHLBI site.

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.

Screenshots

NIH BMI Calculator2 screens
CDC4 screens

Verdict

The call

The clearest difference is update cadence: CDC at monthly against NIH BMI Calculator's every 30 months. CDC also leads on ratings volume (413 vs 51). NIH BMI Calculator's advantage is review sentiment (31% vs 22%) and iOS requirement (7.0 vs 15.6). On price, rating, ads and in-app purchases 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

On the App Store both sit at effectively the same score — 2.9 for NIH BMI Calculator against 2.9 for CDC. That said, the two scores are not equally well evidenced: CDC has 413 ratings behind it against 51, so its average is the more settled of the two. Written reviews are what separate them: 31% of NIH BMI Calculator's written reviews are positive against 22% of CDC's.

UpkeepUpdate frequency

NIH BMI Calculator ships an update every 30 months, CDC monthly. The most recent releases landed on October 8, 2026 and October 13, 2026 respectively.

Scorecard4 real differences · 6 level
NIH BMI Calculator versus CDC: the parameters behind the verdict, then further details
ParameterNIH BMI CalculatorCDC
PriceFreeFree
Rating2.9 (51 ratings)2.9 (413 ratings)
Positive reviews30.7% of reviews — better22.5% of reviews
Number of ratings51413 — better
Update frequencyEvery 30 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS7.0 — better15.6
Further details — not scored
Size16 MB38 MB
Age rating4+12+
DeveloperThe National Heart Lung and Blood InstituteCenters For Disease Control and Prevention

Customer experience

NIH BMI Calculator

All ratings51 ratings
Positive39.2%
Neutral13.7%
Negative47.1%
Written reviews75 reviews
Positive30.7%
Neutral10.7%
Negative58.7%

CDC

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

User reviews

NIH BMI Calculator

From 51 App Store ratings

What we love

  • 👍 Simple and straightforward
  • ✅ Calculates BMI correctly
  • 🔗 Links to helpful information
  • 🚫 No ads
  • 💯 Works as intended (when functional)

Room to improve

  • ❌ Cannot key decimal points
  • ❌ Unusable in metric mode
  • ❌ App crashes/won't open
  • ❌ Outdated and not maintained
  • ❌ Ignores physical fitness/gender

CDC

From 413 App Store ratings

What we love

  • 💡 Informative and reliable health information
  • 🚀 Easy to navigate and access data
  • 👍 Useful for public health professionals and students

Room to improve

  • 🐛 Frequent crashes and bugs
  • ⚠️ Outdated or inaccurate information, especially regarding COVID-19
  • 🔒 Privacy and security concerns
  • 👎 Lack of trust in the CDC due to political influence

Bugs and requests

NIH BMI Calculator

Reported bugs

5 issues
  • App crashes immediately on launch
  • App does not open
  • Input fields non-responsive on active call
  • App closes before loading
  • App no longer works with latest iOS updates

Requested features

8 requests
  • Add decimal point input for weight
  • Allow recording of daily weight and view as a graph
  • Include gender input for BMI calculation
  • Add option for recording daily exercise
  • Add option for tallying fruit/vegetable intake
Show 3 more
  • Optimize for newer iPhone models
  • Store results within the app
  • Include information within the app, not redirect to web

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

In-app purchases

None

NIH BMI Calculator

No in-app purchases

None

CDC

No in-app purchases

Questions

Is NIH BMI Calculator free?
NIH BMI Calculator is free to download, with no in-app purchases.
Is CDC free?
CDC is free to download, with no in-app purchases.
Which has better reviews, NIH BMI Calculator or CDC?
NIH BMI Calculator and CDC are both rated 2.9 out of 5 on the App Store, from 51 and 413 ratings respectively.
Do NIH BMI Calculator or CDC have ads?
Neither NIH BMI Calculator nor CDC shows ads.
Which is updated more often, NIH BMI Calculator or CDC?
NIH BMI Calculator ships an update every 30 months, and CDC monthly. Most recently, NIH BMI Calculator was updated on October 8, 2026 and CDC on October 13, 2026.

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