Calculate standard adult BMI
Enter height and weight in metric or imperial units and see the calculated BMI with the standard screening category.
A private BMI and weight-trend utility
Know the number.
Watch the trend.
Calculate standard adult BMI, keep optional weigh-ins, and see how the record changes over time—without creating an account.
Coming soon · In App Store reviewHow it works
Free at launchiPhone · iOS 18+By Ideas All Day Ltd
Built for the task
Calculate standard adult BMI
Native iOS
The short answer
A direct definition for readers, search engines, and answer systems.
What is BMI Tracker?
BMI Tracker is an iPhone calculator and local weight journal. It calculates standard adult body mass index from height and weight, shows the usual screening category, and can organize weigh-ins, a trend chart, and an optional personal goal.
BMI is a general adult screening measure, not a diagnosis, individualized health assessment, treatment recommendation, or substitute for a qualified clinician.
- Units
- Metric + imperial
- History
- Local on iPhone
- Account
- Not required
Inside the app
Focused tools, built around one job.
Every feature supports the same workflow, so the app feels like a system rather than a folder of disconnected AI buttons.
01
Keep optional weigh-ins
Save only the entries you want and revisit the dated record in a simple local history.
Follow the trend
Use the chart to see the direction of your own entries over time instead of overreacting to one measurement.
Set a personal reference goal
Add an optional weight goal for your own tracking; the app does not prescribe a target or treatment.
No account or active analytics
The submitted initial release keeps entries in the private app container and has no active third-party analytics.
Keep the limitation visible
BMI is a broad screening measure and does not account for every body composition, age, health, or clinical factor.
Product tour
See the workflow.
Real screens from the current iPhone experience.
How it works
From input to useful answer.
- 01
Choose your units
Use metric or imperial measurements and enter the height and weight you want to calculate.
- 02
Read the screening result
Review the calculated BMI and standard adult category as general context, not a diagnosis.
- 03
Save only if useful
Keep a weigh-in, set an optional goal, and return later to review your local trend.
Who it helps
Useful in the moment you need it.
Adults tracking weightPeople preparing for a check-inMetric usersImperial users
Practical guide
How to calculate BMI
Use the metric or imperial adult BMI formula, check the arithmetic, read the standard category as screening context, and keep body composition, age, pregnancy, growth, and individual health outside the number.
Direct answers
Frequently asked questions.
How is BMI calculated?
BMI divides weight in kilograms by height in meters squared, or uses the equivalent imperial conversion. The app applies the standard adult formula to the measurements you enter.
Is BMI a diagnosis or a recommended goal?
No. BMI is a general screening measure and can be misleading for an individual. The app does not diagnose a condition, prescribe a target, or recommend treatment.
Where are weigh-ins stored?
The submitted initial release stores entries locally in the app’s private container on your iPhone. No account is required.
Does the app send my exact weight to analytics?
No. Third-party analytics are not active in the submitted initial release, and the exact weight is not transmitted to Ideas All Day.
Currently in App Store review
BMI Tracker is almost ready.
Version 1.0 has been submitted to Apple and the public store page will appear after approval.
Submitted to App Store