BMI Calculator・Weight Tracker vs WatchBMI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BMI Calculator・Weight Tracker
Easily calculate your Body Mass Index (BMI) and track your weight progress. Visualize your trends with graphs, gain predictive insights, and set goals for your health journey. Supports metric and imperial systems, with Apple Watch integration.
- BMI Calculation
- Weight Tracking
- Metric and Imperial Systems
- Apple Watch Integration
- Graphs and Stats
- Predictive Insights
Read full descriptionHide full description
Calculate your BMI (Body Mass Index) and monitor your weight with our user-friendly app. Whether you’re on a weight loss journey or aiming to maintain a healthy weight, our app provides essential tools to help you reach your goals. Key Features: • BMI Calculation: Easily calculate your BMI using your height and weight. • Metric and Imperial Systems: Choose your preferred measurement system for accurate results. • Weight Tracking: Log your weight regularly to track your progress over time. • Apple Watch Integration: Sync your weight data with Apple Watch for seamless tracking and analysis. • Beautiful Graphs and Stats: Visualize your weight trends with clear graphs and insightful statistics. • Predictive Insights: Understand your true weight trend, predict future weights, and set commitment goals. The BMI Calculator and Weight Loss is free to download and utilize. However, users can opt for a subscription to access additional features. Your subscription will automatically renew and you’ll be billed based on the plan you choose. You can cancel your subscription at any time in the App Store. Disclaimer: Our BMI Calculator is not intended for medical diagnostics. Always consult a healthcare professional before making any health-related decisions. Terms of use: https://aboutmeapps.com/terms-of-use.html Privacy policy: https://aboutmeapps.com/privacy-policy.html
WatchBMI
Read full descriptionHide full description
This app is a BMI (Body Mass Index) calculator. It is very simple, in that it asks for input of height and weight, and displays the calculated value for BMI. It does not measure anything; it only displays the calculated BMI based on entered values. I created this for my own practice, because I often need to calculate BMI, and do not want to have to take out and unlock my phone every time. While it will certainly work for an individual to determine her own BMI, it is targeted at users (such as myself) who need to calculate BMI based on the measurements of multiple individuals. It does report the CDC category of the BMI, but does not otherwise interpret any of the data. It does not store or collect any of the entered information. You should know that BMI is only a reflection of height and weight; it does not assess body composition, or differentiate between fat and muscle. Instructions: Simply click on one of the buttons on the main screen to show a keyboard for entering the value. WatchBMI can accept values in either the Metric or the Imperial system. Click the "M" button to change to metric, click the "I" button to change to imperial If Imperial: Click on "Pounds" to enter the weight in pounds. Use the "Back" button to go back to the main screen. Click on "Feet" to enter the feet part of height. Click on "Inches" to enter the inches part of height. If Metric: Click on "Kilos:" to enter the weight in kilograms. Click on "Cms: to enter the height in centimeters. The app does not allow inches greater than 11, feet greater than 7, or weight greater than 999, with similar maximums in metric. Once all three values have been entered, the main screen (again, click the "Back" button) to show the calculated BMI and the CDC category for that BMI. When changing from Imperial to Metric or Metric to Imperial, the height and weight will change as well, so you can enter weight in kilograms and height in feet and inches. Reference Information: Information from the U.S. Centers for Disease Control and Prevention (CDC) provides information about BMI and its appropriate use at https://cdc.gov/bmi BMI is a measure of weight relative to height. According to CDC at https://www.cdc.gov/bmi/about/index.html : BMI is a quick, low-cost, and reliable screening measure for underweight, overweight, or obesity; BMI is a valuable population health measure used worldwide; for individuals, BMI should be considered with other factors, such as blood pressure, cholesterol levels, and physical examination. The CDC Adult BMI Categories are from https://www.cdc.gov/bmi/adult-calculator/bmi-categories.html. BMI and this app does not diagnose or treat any condition. The CDC BMI Categories calculated by this app are designed for adults 20 and older, and do not apply to children. Check with your doctor before using this app or making any medical decisions based on BMI.
Screenshots
Verdict
The clearest difference is price: BMI Calculator・Weight Tracker at Free against WatchBMI's $0.99. WatchBMI's advantage is in-app purchases (none vs 5) and update cadence (daily vs every 2 months). On 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
BMI Calculator・Weight Tracker is free to download; WatchBMI costs $0.99 up front. BMI Calculator・Weight Tracker sells 5 in-app purchases, starting at $9.99 per month. WatchBMI asks for nothing beyond the download.
BMI Calculator・Weight Tracker ships an update every 2 months, WatchBMI daily. The most recent releases landed on September 13, 2026 and September 6, 2026 respectively.
| Parameter | BMI Calculator・Weight Tracker | WatchBMI |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.8 (508 ratings) — better | — |
| Positive reviews | 84.0% of reviews | — |
| Number of ratings | 508 — better | — |
| Update frequency | Every 2 months | Daily — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPod, Apple Watch |
| Requires iOS | 14.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 53 MB | 0 MB |
| Age rating | 17+ | 17+ |
| Developer | AboutMe Apps, Inc. | James Nachbar |
Bugs and requests
BMI Calculator・Weight Tracker
Reported bugs
4 issues- App stopped working after June 2024 update
- Crashes on iPad Air (5th Generation) with iOS 17.5.1
- Unable to open app on latest iOS versions
- App fails to launch after recent updates
Requested features
2 requests- Restore different color options for tracking
- More sensitive language for BMI categorization
WatchBMI
Not enough reviews yet to summarise bugs or requests.
In-app purchases
BMI Calculator・Weight Tracker
- Monitor your weight & progress$9.991 Month
- Monthly Premium$9.991 Month
- Predict your future weight+BMI7 Days trial$19.991 Year
Show 2 moreShow fewer
- Premium Year$19.991 Year
- Premium 3 Months$19.993 Months
WatchBMI
No in-app purchases
Questions
Is BMI Calculator・Weight Tracker free?
Is WatchBMI free?
Do BMI Calculator・Weight Tracker or WatchBMI have ads?
Which is updated more often, BMI Calculator・Weight Tracker or WatchBMI?
Other comparisons















