FeraFood and burn tracker for iPhone
What you eat.What you burn.Who you become.
- A wild beast. From Latin fera.
- Someone who is very, very good at what they do.
Fera logs your meals from a photo, your voice or one sentence. It measures your burn and learns your real metabolism, sets your targets from your goal, and shows how your day, week and year are really going.
Inside Fera
Eight tools that work as one.
Each one feeds the others. Your goal sets the targets, your log and your burn fill them in, and your weight trend checks the math.
Photo and voice logging
Snap the plate or say what you had. Macros in seconds.
Goals that do the math
Lose, maintain or gain at your pace. Fera works out every target.
Calorie quality
Today's protein, carbs and fat against the mix your goal needs.
A burn that learns you
Your resting burn, tuned to how your weight really moves.
Weekly progress
Running totals for the week against your goal line.
Eight trend charts
Weight, food, burn, balance, macros and steps by week, month or year.
Fera AI
A coach that reads your own numbers before it answers.
Apple Health
Steps, active energy, workouts and weight, each counted once.
Logging
Show it or say it. That's the log.
Take a photo of your plate, say what you had, or type one line. Fera works out calories, protein, carbs and fat in a couple of seconds, and every number stays editable.
Goals
Set the goal. Fera does the math.
Pick lose, maintain or gain, how fast, how active you are, and whether you're building muscle. Fera turns that into a daily calorie target, a burn target, and grams of protein, carbs and fat, and shows how it got each one.
- 0.5 or 1 lb a week
- Muscle gain or maintain
- Targets you can override
Calorie quality
Two 1,800-calorie days can be very different days.
The quality rulers put the split your goal needs above the split you've actually eaten, so you can see the gap and fix it at dinner instead of finding out next week. Trends shows the same comparison averaged over a week, month or year.
Burn
A burn number that learns you.
Most apps hand you a burn figure and ask you to trust it. Fera shows how it got there, line by line, then checks itself against your scale.
(5.0 MET − 1) × 83.7 kg × 0.83 h from the Compendium of Physical Activities.
Learning
Your metabolism, measured instead of guessed.
Every formula guesses your resting burn from age, height and weight, and can be off by a few hundred calories a day. Fera checks the guess. Each day it compares the last 28 days of food and burn with what your weight actually did, and if you lost faster or slower than the math predicted, it adjusts your resting burn to match.
It waits for good data first and never moves more than 15% from the formula. You can turn it off in your profile.
Counted once, whatever you wear.
Pick your setup. Fera adds only what isn't already in the total.
Steps from your phone
Plus the workouts you log. Walks and runs you log don't count their steps twice.
Your watch's active energy
It already includes your steps and workouts, so nothing is added on top.
Workouts through Apple Health
Their workout energy comes in, and your phone's steps are counted separately.
Profile and logged workouts
A careful estimate from your body, your food and the workouts you log.
Weekly Progress
Watch the week add up.
One good day doesn't make a week. Weekly Progress keeps a running total of your deficit, protein, carbs and fat, drawn against a dashed goal line, so by Wednesday you know whether the week is on track.
- Total or vs. goalSee how much you've built up, or how far ahead or behind the goal you are.
- Press and hold any dayRead the exact running total for that day.
- Week, month and yearThe same view becomes Monthly and Yearly Progress in Trends.
Trends
Every number, charted.
Eight charts, each with your goal drawn in, across a week, a month or a year. Step back through past periods, and press and hold any bar to read that day.
Average eaten, burned and net for the period, with today left out until it's over.
Calorie quality averaged across the week, month or year.
Export any range of days as a file whenever you like.
Fera AI
Ask about your own numbers.
Fera AI reads your log, your burn, your goals and your weight trend before it answers. Ask how to hit protein tonight, why the scale went up after a weekend, or where your maintenance is, and get an answer about your week instead of a generic article.
- Knows your goals
- Voice or text
- Remembers what you tell it
- Ask from any day or chart
Fera AI can make mistakes and doesn't give medical advice.
GLP-1
For every stage of a GLP-1 journey.
GLP-1 medications change how much you want to eat. They don't change what your body needs. Fera helps with the part that's yours: enough protein, a sensible deficit, and a clear view of maintenance for when the dose changes.
Protect muscle
A small appetite makes protein easy to miss. Fera sets a target from your weight and goal and shows how close each meal gets you.
Find maintenance
Appetite tends to come back before habits do. Your learned burn gives you a real number to eat toward instead of a guess.
Keep the trend honest
Log lightly and watch Weekly Progress. A slow drift shows up in weeks, while it's still easy to correct.
Fera doesn't prescribe, dose or track medication, and it doesn't replace your clinician. Talk to them before changing your treatment or diet.
The whole app, eight screens.
Dark, quiet and fast. Your day, your week and your goal fit on the first screen.
Pricing
Free to track. Pay for more AI.
Forever
- Unlimited manual logging
- Goals, burn, progress, trends and Apple Health
- 3 AI food estimates a day
- 6 Fera AI questions a month
$3.33 a month, billed yearly
- Everything in Free
- 40 AI food estimates a day
- 40 Fera AI questions a day
- Try it free for 7 days
Cancel any time
- Everything in Annual
- Billed month to month
Prices in US dollars. Subscriptions are billed through your Apple ID and renew automatically until you cancel in Settings. Daily AI limits keep the service fast for everyone.
No ads, and we never sell your data.
Export every day you've logged as a file, any time.
Delete your account and all of its data from inside the app.
FAQ
Questions
How accurate are the AI food estimates?
As accurate as the photo or description. Show the whole plate or name the portion and how it was cooked, and they land close; you can correct any number before or after you add it. For packaged food, the label's numbers are still the best source, and you can type them in directly.
How does Fera learn my metabolism?
Once you have about four weeks of well-logged days and a weigh-in every few days, Fera compares the deficit it calculated with the weight you actually lost or gained, and adjusts your resting burn to close the gap, by no more than 15%. It rechecks every day, so it keeps up as your body changes.
Do I need an Apple Watch?
No. Fera works with your iPhone's step count, with an Apple Watch, with WHOOP, Oura or Garmin through Apple Health, or with no wearable at all.
Why is my burn different from my watch's number?
Watches show active calories, and many apps add a resting figure on top without saying how. Fera shows every part of the total, so you can see where a difference comes from, and its resting burn is checked against your real weight trend.
Is Fera for people on a GLP-1 medication?
It's built with them in mind, whether you're on one, tapering, or finished, and it works just as well without one. Fera doesn't give medical advice; check with your clinician before changing your treatment or diet.
Can I use Fera without the AI?
Yes. Manual logging, goals, burn, progress, trends and Apple Health are free and unlimited. AI estimates and Fera AI are there when you want them.
What happens to my data if I stop paying?
Nothing is deleted. You move to the free plan with your whole history intact.
When can I get it?
The TestFlight beta opens soon, ahead of the App Store release. Email us and we'll send you an invite.