Play3rs by Z-AX

Know your number.
Track the trend.

BMI Calculator - Weight Log works out your Body Mass Index in a tap and quietly charts your weight so you can see progress, not just a single reading.

Get it on Google Play
Free · Android · No account · Metric & imperial units
Features

Simple maths, clear picture

🧮

Instant BMI

Enter height and weight and get your BMI and category immediately — no formula to remember.

📈

Weight-log chart

Every entry plots on a clean graph so you can spot the trend across weeks and months.

🎯

Goal tracking

Set a target weight and watch how far you've come and how much is left.

🔁

Metric & imperial

Switch freely between kg/cm and lb/ft-in — the app converts everything for you.

📝

Notes per entry

Add context to a reading — after a holiday, a new routine, a weigh-in time — for honest history.

🔒

Private & offline

No sign-up and no cloud. Your health data stays on your phone, full stop.

Reference

What the categories mean

Under 18.5Underweight
18.5 – 24.9Normal
25 – 29.9Overweight
30 and overObese

Starting a fitness plan

Get a baseline on day one, then check in weekly to see the direction of travel.

Maintaining a healthy weight

A quick monthly check keeps you honest without obsessing over daily fluctuations.

Following a doctor's advice

Log weigh-ins between appointments so you can show a real trend, not one number.

Whole-family check-ins

Switch units for relatives abroad and calculate BMI for everyone in the same app.

Not medical advice. BMI is a general screening tool and doesn't account for muscle mass, age or body composition. Athletes and some body types read high or low. Use this app for tracking and awareness, and talk to a qualified healthcare professional about what's right for you.