Diet Otter . Weight Tracker

Log your weight in two seconds and let the otter crunch the numbers: body fat, metabolism, calorie deficit and a projection of where your curve is heading.

Diet Otter turns a simple weigh-in into a real reading of your progress.

You log your weight. The app does the rest: it works out your body fat percentage, your basal metabolic rate, your daily energy expenditure, and draws the actual trend of your curve — the one that matters, not the day-to-day noise.

TRACK WITHOUT THE CHORE • A weight, a date, that's it • Calorie and protein counters, two taps • Waist, neck and hip measurements if you want more precision • A logbook of every day you've recorded

UNDERSTAND WHAT IT MEANS • Body fat percentage using the Navy method, as used by the US Navy • Lean mass, basal metabolic rate (Mifflin-St Jeor), estimated total expenditure • Average and cumulative calorie deficit, converted into theoretical kilos of fat • Charts for weight, body fat and calories

KNOW WHERE YOU'RE HEADING • Curve projection by linear regression on your own data • Estimates at 7 days, 1 month, 3 months, and up to next Christmas • Estimated date to reach your target weight

YOUR DATA STAYS YOURS • No email, no phone number: a nickname and a 6-digit PIN are enough • No health data is ever used for advertising • Permanently delete your account from inside the app, in two taps • French, English and Japanese

Diet Otter is free. It is funded by a few ads, shown sparingly.

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Diet Otter is a personal tracking tool. The values shown are rough estimates, for guidance only: they are not a diagnosis, medical advice or treatment. Please consult a health professional before starting any weight loss or weight gain plan.