BMI Diary vs BMI Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BMI Diary
Track your Body Mass Index (BMI) daily to manage weight and health effectively. Visualize your BMI trends in real-time to monitor progress. This tool is ideal for those focused on weight loss or bodybuilding.
- Daily BMI calculation
- Save BMI values
- Visualize BMI trends
- Weight management
- Health monitoring
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Weight loss and bodybuilding start with effective management of your BMI value! BMI Diary will help you calculate and save BMI values every day. Visualization changes of your BMI values make it easier for users to monitor BMI trends in real-time. Manage your weight and health from BMI Diary! BMI Calculation Reference: https://en.wikipedia.org/wiki/Body_mass_index
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 rating: BMI Calculator at 4.8 against BMI Diary's 4.1. BMI Calculator also leads on ratings volume (378 vs 7) and review sentiment (83% vs 75%). BMI Diary's advantage is update cadence (every 3 weeks vs every 13 months) and device support (4 vs 2). 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
Both are free to download. BMI Diary sells 1 one-off in-app purchase and BMI Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
BMI Calculator holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: BMI Calculator has 378 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 75% of BMI Diary's written reviews are positive against 83% of BMI Calculator's.
BMI Diary ships an update every 3 weeks, BMI Calculator every 13 months. Both last shipped on November 3, 2026.
| Parameter | BMI Diary | BMI Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (7 ratings) | 4.8 (378 ratings) — better |
| Positive reviews | 75.0% of reviews | 83.3% of reviews — better |
| Number of ratings | 7 | 378 — better |
| Update frequency | Every 3 weeks — better | Every 13 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPod |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 17 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | APPS BAY LIMITED | Leap Health |
Customer experience
BMI Diary
BMI Calculator
Bugs and requests
BMI Diary
Not enough reviews yet to summarise bugs or requests.
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
BMI Diary
- Remove Ads forever$0.99
BMI Calculator
- Remove Ads$2.99
Questions
Is BMI Diary free?
Is BMI Calculator free?
Which has better reviews, BMI Diary or BMI Calculator?
Do BMI Diary or BMI Calculator have ads?
Which is updated more often, BMI Diary or BMI Calculator?
Other comparisons
