Point and shoot
Vision reads the dish, the portion and the macros in a couple of seconds. No database search, no barcode hunt, no serving-size guesswork.
The blind spot
“563 calories” is a number you can’t picture.
It isn’t a lot or a little until you know what it costs you and almost every calorie app answers that with a textbook constant. The same burger is priced identically for a 55 kg person and a 95 kg one, which is simply not true.
- A calorie count tells you what you ate. It doesn’t tell you what undoing it would take.
- Generic burn tables flatten the one variable that actually matters: your own body.
- Reporting gross burn quietly counts the energy you’d have spent lying still. Flattering, and useless.
What Earnt does
The price tag is in minutes of your own effort.
Resting metabolism from Mifflin-St Jeor, scaled by each activity’s MET value, reported net of the energy you’d have burned anyway. Photograph the plate, read the time cost, decide before you eat it.
- Minutes sit where the calorie count normally would , the figure you can actually act on.
- Ten ways to burn it off, each carrying its own MET from the 2011 Compendium of Physical Activities.
- Net burn only. The resting portion you’d have spent regardless is subtracted before you see the number.
Using it
It takes about three seconds.
See the cost
612 kcal becomes 56 minutes of running, 1 hr 16 of cycling, 3 hr 18 of walking, computed for your body rather than an average one.
Earn it back
Steps and active energy arrive from Apple Health, read-only, and pay the day down as you move.
The maths
“Personalised” is a claim. This is the formula.
Mifflin-St Jeor gives your resting metabolic rate from weight, height, age and sex. The Compendium gives each activity its MET. Multiply, subtract the resting portion you’d have burned anyway, and what’s left is the honest number — which is usually a longer one.
- 1RMR from Mifflin-St Jeor. Your weight, height, age and sex, never a fixed 2,000 kcal assumption.
- 2MET per activity, from the Compendium. Running, cycling and walking price the same meal very differently.
- 3The resting calories come off first. You would have burned those on the sofa, so they are not yours to claim.
14min gap between a 55 and 95 kg body
0meal photos kept by us
10activities, each MET-rated
The rest of it
The rest of what keeps the number honest.
01
RunningCyclingSwimmingWalkingWeightsHIITRowingStairs+2 more
10 ways to burn it off
Running, cycling, walking, swimming and six more. Pick the one you would actually do.
02
Smarter swapSingle patty, no mayo → 374 kcalSaves you 22 minutes of running
A better version, offered once
Where the same meal has a genuinely better version, Earnt names it and then drops the subject.
03
We never keep your photos
A meal photo is sent once for analysis and never stored by us. The log, the profile and the images live on the device.
04
Gross burn51 min
Net burn — what Earnt shows56 min
It refuses to flatter you
You would have burned the resting calories anyway, so only the extra counts. The minutes come out longer.