BMI Calculator: Weight Index

BMI Tracker & Trend Charts

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Rebuilt for iOS 26: a fast, private BMI tracker with trends, a healthy-weight range, widgets, and Apple Health sync. Remove the ad with one purchase. No account, ever. BMI Calculator helps you understand your body mass index and track it over time. Fast, private, and free. Enter your height and weight and get your BMI instantly, with a clear, color-coded category and a plain-language explanation of what the number means. Switch between metric and imperial units, and choose the BMI standard that fits you, including WHO/CDC cutoffs and WHO Asian action points. WHAT YOU CAN DO • Calculate BMI in seconds with a clean, accessible interface • See the healthy weight range for your height, shown in your units • Track every result in your history and watch the trend chart over weeks and months • Add Home Screen and Lock Screen widgets to see your latest number at a glance • Use Spotlight and Siri Shortcuts to calculate without even opening the app • Sync weight and height with Apple Health so your data stays consistent across apps • Designed for adults: clear, non-judgmental, and person-first throughout REMOVE ADS (optional, one-time purchase) The free version shows a single, non-personalized banner ad. Prefer none? One tap removes it for good. No subscription, ever. PRIVATE BY DESIGN Your measurements stay on your device. No account, no sign-up, and no selling of your data. Your health data is never used for ads. A NOTE ON HOW TO USE THIS APP BMI is a screening tool, not a diagnosis. It is a general indicator that does not measure body composition directly and does not account for muscle mass, bone density, or other individual factors. This app is for general informational and educational purposes only and is not a substitute for professional medical advice. Please talk with a qualified healthcare provider about your health and before making changes to diet or exercise. Download BMI Calculator and start tracking your numbers today.

Ratings & Reviews

  • 4.8
    out of 5
    9 Ratings

Version 2.0 is a complete, ground-up rebuild for iOS 26: faster, cleaner, and more private. • New: your healthy weight range for your height, shown in your units • New: a History tab with a trend chart that highlights the healthy range • New: Home Screen and Lock Screen widgets, plus Spotlight and Siri "Calculate BMI" • New: Apple Health sync, and a choice of WHO/CDC or WHO Asian BMI cutoffs • New: clearer context on what BMI can and can't tell you, including how muscle can raise the number • Improved: full VoiceOver and Dynamic Type support, with a refined light and dark design • Optional: a one-time Remove Ads purchase. No subscription, ever. Your measurements stay on your device.

Version 2.0

The developer, Josiah Rininger, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Josiah Rininger
Size
  • 5.2 MB
Category
  • Health & Fitness
Compatibility
Requires iOS 18.0 or later.
  • iPhone
    Requires iOS 18.0 or later.
  • iPad
    Requires iPadOS 18.0 or later.
  • Mac
    Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 2.0 or later.
Languages
  • English
Age Rating
9+
  • 9+
  • Learn More
  • Contains
    Advertising
    Health or Wellness Topics
In-App Purchases
Yes
Copyright
  • © 2026 Josiah Rininger
  • Privacy Policy

    • More by Josiah Rininger

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