NIH BMI Calculator vs CDC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Body Mass Index calculation
- Weight category screening
- Access to NHLBI health resources
- Downloadable phone application
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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.
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.
- Up-to-date health information
- Customizable home screen
- Disease case counts
- Videos and podcasts
- Journal articles
- Searchable web content
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | NIH BMI Calculator | CDC |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (51 ratings) | 2.9 (413 ratings) |
| Positive reviews | 30.7% of reviews — better | 22.5% of reviews |
| Number of ratings | 51 | 413 — better |
| Update frequency | Every 30 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 7.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 16 MB | 38 MB |
| Age rating | 4+ | 12+ |
| Developer | The National Heart Lung and Blood Institute | Centers For Disease Control and Prevention |
Customer experience
NIH BMI Calculator
CDC
User reviews
NIH BMI Calculator
From 51 App Store ratingsWhat 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 ratingsWhat 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
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- 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
NIH BMI Calculator
No in-app purchases
CDC
No in-app purchases




