Calorie targets that adjust to what you actually burn.
Ferro reads your weigh-ins against what you eat, works out what you burn each day, and adjusts your calorie target to match.


Targets from what you actually burn
Ferro learns what you actually burn from your meals, movement and weigh-ins, and adjusts your calories to match. You can see your daily burn, the 12-week trend and how Ferro worked out the number.

Your weight, read against your food
Ferro smooths daily weigh-ins into a trend and sets the trend beside what you ate, so one salty dinner doesn't send you off course.

Meal estimates you can check
Snap a photo, scan a barcode or type what you ate. Ferro breaks down the calories and macros so you can check them, and remembers your fixes.

Questions people ask
- How does Ferro work out what I burn?
- If your weight holds steady, you are burning about what you eat. If your weight drops, you are burning more than you eat. Ferro does that sum with your meals and weigh-ins, and evens out day-to-day swings in your weight.
- How can I tell if the number comes from my logs?
- Look for “Your daily burn” on the Progress tab. The card says Measured when the number comes from your logs, and Estimate when Ferro is working from your profile: your height, weight, age and the days you train. Tap the card to see the sum.
- Will Ferro change a target I set myself?
- Not without asking. If you type your own target, Ferro keeps yours, and the weekly check-in only changes the number if you accept. If you let Ferro set your calories, the target follows your measured burn. The one exception is safety: if your number is below a safe minimum and your weight is already under the healthy range, Ferro uses the minimum.
- Can Ferro set my calories too low?
- No. Ferro never sets a calorie target below a safe minimum, and won't cut your calories at all if your weight is already below the healthy range for your height.
Find out what you really burn.
Log your meals and weigh in when you can. Ferro works out the numbers and keeps your target in step.
App screens show a demo account.