BMI calculator
Calculate your BMI instantly in Metric or Imperial units, with your category and healthy weight range shown alongside the result.
Private BMI & Weight Tracker
BMI Tracker
A free, private, offline-first iPhone app for calculating BMI, tracking weight progress, and setting personal goals — with no account, no ads, and no network connection required.
LiveHealth & FitnessiPhone
What it does
BMI Tracker is a simple, private way to calculate and follow your Body Mass Index over time. Enter your height and weight in Metric or Imperial units to get an instant BMI result, your category, and your healthy weight range.
Save each measurement to build a history, and watch a detailed trend chart of your BMI and weight over time. Set a personal weight goal and track progress toward it, see an optional daily calorie target estimated for that goal, and use 7/30/90-day and all-time insights to understand where things are heading.
Export your full history as a CSV file, or generate an on-device PDF progress report — useful for sharing with a doctor or trainer. Choose from five color themes, switch between Light, Dark, or System appearance, and turn on optional local reminders to log a new measurement.
There is no account, no sign-up, and no internet connection required. Everything entered stays on the device — nothing is uploaded, sold, or shared. BMI Tracker is completely free, with every feature available to every user.
Who it is for
- Anyone who wants a quick, accurate BMI calculation without creating an account
- People tracking weight over time who want a private alternative to cloud-connected fitness apps
- Users setting a personal weight goal and wanting to see real progress toward it
- Anyone who wants a completely free app, with no ads, subscriptions or paywall
- Platform
- iPhone
- Data storage
- 100% on-device
- Status
- Live
- Pricing
- Completely free
Built with
- Flutter
- Dart
Features
Everything included
BMI Tracker is built around a small number of things done thoroughly, rather than a long list done partially.
Metric & Imperial units
Switch freely between unit systems — every screen adapts automatically.
Healthy weight range
See the healthy weight range for your height alongside every BMI result.
BMI history
Every measurement is saved locally so you can look back at how things have changed.
Detailed trend charts
A trend chart of your BMI and weight over time, built from your saved history.
Weight goals
Set a personal target weight and track progress toward it with a simple progress ring.
Daily calorie target
An optional, personalized daily calorie estimate for reaching your goal, computed entirely on-device from your age, sex, and activity level.
Advanced insights
7/30/90-day and all-time analytics break down your BMI and weight trends automatically.
CSV data export
Export your full BMI history as a CSV file whenever you want it.
PDF progress reports
Generate an on-device PDF progress report — useful for sharing with a doctor or trainer.
Five color themes
Personalize the app with five color themes, in Light, Dark, or System appearance.
Optional local reminders
Turn on local reminders to log a new measurement — off by default, and never containing your actual BMI, weight, or goal values.
No account required
No sign-up, no login, and no internet connection needed for any feature.
Privacy
Your data stays yours
A short summary of how BMI Tracker handles privacy. The full policy has the details.
Use cases
Where it earns its place
The situations this was designed around, drawn from how teams actually work today.
Daily check-ins
Log a new height/weight measurement in seconds and see your BMI update instantly.
Tracking progress toward a goal
Set a target weight and watch a simple progress ring move as you get closer.
Planning daily calorie intake
See an estimated daily calorie target for your goal's pace, computed on-device from your age, sex, and activity level.
Understanding long-term trends
Use 7/30/90-day and all-time insights to see whether your BMI is trending up, down, or holding steady.
Sharing progress with a doctor or trainer
Export a CSV of your full history or generate a PDF progress report to bring to an appointment.
Roadmap
Where it stands
BMI Tracker is live on the App Store.
Now
CompleteCore tracking built
BMI calculation, history, weight goals, a daily calorie target estimate, advanced insights, trend charts, CSV/PDF export, five color themes, and optional local reminders are implemented and tested (459 automated tests passing).
Now
CompleteShips completely free
BMI Tracker 1.0 is free for every feature — no subscription, no in-app purchase, no account.
Now
CompleteLive on the App Store
BMI Tracker is live and available as a free download on the App Store.
Live · Available now
Get BMI Tracker on the App Store
It's live and free to download — no waitlist, no signup required.
It is completely free — no subscription, no in-app purchase, no account.