NIH BMI Calculator vs BMI Calculator
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.
BMI Calculator
Calculate your Body Mass Index (BMI) using age, gender, height, and weight. Track your health progress, find your ideal weight, and receive tips for weight control. Supports metric and imperial units and syncs with Apple Health.
- Calculate BMI scientifically
- Find ideal weight
- Log BMI history
- Track health progress
- Sync data to Apple Health
- Metric and imperial support
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With this free BMI Calculator, you can calculate and evaluate your BMI (Body Mass Index) simply by entering age, gender, height and weight. It supports metric or imperial and is designed based on the WHO BMI classification. What You Can Do: - Calculate your BMI scientifically - Find your ideal weight & Get professional tips - Log your BMI history & Track your health progress - For everyone! Adults, teens, and children - Sync data to Apple Health Being overweight or obese increases the risk of obesity-related diseases, such as hypertension, heart disease and diabetes. It’s time to find your ideal weight. You can also use it to check your diet or weight loss effect. Why You Need It: Wanna know your BMI and weight changes at a glance? Want to prevent obesity-related diseases? Wish to know tips to reach an optimal weight? Look for a BMI calculator for your children? Download our app now as a useful starting point for your weight control and health improvement. Medical Disclaimer BMI Calculator: Weight Tracker shall not be treated as a professional medical service provider. Service does not substitute diagnosis, professional treatment, or medical advice from healthcare professionals. If you have experienced any medical conditions, please consult your doctor. Service is for educational and informational purposes only. You are completely aware that the information and data provided may not be accurate, secure, or comprehensive. Due to individual differences, Service is not available to everyone. Please request your doctor to access your suitability for Service. You confirm that you are fully responsible for your safety and health. BMI Calculator: Weight Tracker shall not be liable for any damage or loss in respect of any access or use of Service.
Screenshots
Verdict
The clearest difference is review sentiment: BMI Calculator at 83% against NIH BMI Calculator's 31%. BMI Calculator also leads on rating (4.8 vs 2.9) and update cadence (every 13 months vs every 30 months). NIH BMI Calculator's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support 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. BMI Calculator sells 1 one-off in-app purchase. NIH BMI Calculator asks for nothing beyond the download.
BMI Calculator holds the better App Store score, 4.8 against 2.9. That said, the two scores are not equally well evidenced: BMI Calculator has 377 ratings behind it against 52, so its average is the more settled of the two. Written reviews point the same way: 31% of NIH BMI Calculator's written reviews are positive against 83% of BMI Calculator's.
NIH BMI Calculator ships an update every 30 months, BMI Calculator every 13 months. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.
| Parameter | NIH BMI Calculator | BMI Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (52 ratings) | 4.8 (377 ratings) — better |
| Positive reviews | 30.7% of reviews | 83.3% of reviews — better |
| Number of ratings | 52 | 377 — better |
| Update frequency | Every 30 months | Every 13 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 7.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 16 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | The National Heart Lung and Blood Institute | Leap Health |
Customer experience
NIH BMI Calculator
BMI Calculator
User reviews
NIH BMI Calculator
From 52 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
BMI Calculator
From 377 App Store ratingsWhat we love
- 👍 Easy to use and understand
- ✅ Accurate BMI calculation
- 📈 Helpful for tracking weight
- 😊 Improves self-esteem
- ✨ Pleasant visual design
Room to improve
- 🤔 Discrepancy with doctor's advice
- ⚠️ Can cause insecurity about weight
- 📉 Graph scale not ideal for weight loss
- 🚫 Ads can be intrusive
- 🤷♀️ Some users disagree with weight categorization
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
BMI Calculator
Reported bugs
4 issues- App crashes when entering decimal weight
- App crashes when entering second day's weight
- App crashes when pressing the 'day' button
- App crashes on second day's input
Requested features
5 requests- Add messages and tips for different weight categories (underweight, overweight, obese)
- Implement dark mode
- Allow data storage for multiple users
- Adjust graph scale for better visibility of weight loss
- Allow input of decimal numbers for weight
In-app purchases
NIH BMI Calculator
No in-app purchases
BMI Calculator
- Remove Ads$2.99
Questions
Is NIH BMI Calculator free?
Is BMI Calculator free?
Which has better reviews, NIH BMI Calculator or BMI Calculator?
Do NIH BMI Calculator or BMI Calculator have ads?
Which is updated more often, NIH BMI Calculator or BMI Calculator?
Other comparisons
