Food & exercise diary
Meals from a food database, water and workouts — strength sets included.
Food · Body · Training tracker
Log your food, body and training. See it as an honest range.
A diary, reports and body measurements that read your own data in ranges — never a verdict. Free, no ads in your diary.
No card. Demo needs no signup.
Everything you log, read honestly
Reports
Balance, macros, water and strength progress across days, weeks and months.
Measurements & photos
13 body measurements, weight trend and side-by-side photo comparison.
Observations
Patterns in your own data — like how local temperature lines up with your weight.
Goals & journey
Set a target and see where you are on the way, as a range.
See three months of tracking — no signup
A sample account with made-up data. Open the diary, reports and observations exactly as a user sees them.
Why a range
Many formulas. One honest range.
One number is a decision someone made for you.
Pick a different formula and the answer moves by several points. A range shows that uncertainty instead of hiding it behind a confident-looking decimal — so you read the trend over weeks, not a false precision.
Read the method →Body fat · four published methods on your numbers
Range of agreement
22.8—33.7%
Width
10.9 pp
Midpoint
28%
Zone
Typical
Demo values · nothing is saved · no cookies
Coming from MyFitnessPal?
Bring your history with you.
Start with a calculator
21 free calculators, each showing its formulas.
Where do you want to start?
01 · Health What your body is made of Body fat, BMI, waist-to-height, body surface area — each with the uncertainty its method carries. 4 calculators → 02 · Fitness How hard to train Heart-rate zones and a daily protein target, worked out from the measurements you already have. 2 calculators → 03 · Style What to look for when buying clothes Body shape read from your own proportions — descriptive, never prescriptive. 1 calculator →
Browse all 21 calculators
Body Fat 5 methods BMI 2 formulas Ideal Weight 7 formulas FFMI raw + normalized Waist-to-Height measured Body Frame Size wrist ratio Heart Rate & Zones 9 formulas BMR 5 formulas TDEE 5 formulas Maintenance calories a range Calorie deficit a range Macros ranges Protein 4 bands Water 5 sources Thermic Effect (TEF) a range Body Shape 5 types Body Surface Area 8 formulas One-Rep Max (1RM) 4 formulas Running Pace pace + predictor Creatine Dosage a range VO₂max 3 methods
Every calculator is free, runs in your browser, and shows its formulas. Estimates, not diagnoses.