iPhone
Notifications where you expect them, Home Screen and Lock Screen widgets and an Apple Watch app. Apple Health brings in your activity, workouts, sleep, heart and body data on its own.
Functions
Everything it does.
The whole app, area by area. What you say, what Kata does with it, and what you get back.
Wherever you are
Made for the phone
in your pocket.
Your health happens away from a desk, so Kata is built for your phone first: full screen, with the nudges that keep a routine going. Lose the signal and it says so, and what you log stays safe on the phone.
Android
The same app and the same notifications. Health Connect brings in your steps, activity, workouts, sleep, heart and body data from whatever you already wear.
And on your computer
Kata works at a desk too: open it in your browser and sign in to the same account. Your logs live on the device you make them on, so a laptop and a phone keep separate records, and Apple Health and Health Connect are connected on the phone. Coming soon, like the apps.
The chat
Questions in. Decisions out.
Type it, say it, or photograph it. Everyday words become structured data, Kata answers with your own numbers in mind, and you decide what is saved.
- Write, speak, photograph
Write a line, tap the mic, or send a photo of your plate. With Kata Plus, photos are read for you and replies are read aloud in a Kata voice, in your language.
- Knows the whole picture
Recovery, training, nutrition, weight and phase are read before every answer, with cited links when the facts matter.
- You stay the editor
Confirm every card yourself, or let Kata save the obvious ones. A setting, not a surprise, and always undoable.
- Yesterday counts too
Name a weekday or a date and it lands on that day. Kata never guesses a date: if it cannot tell, it asks instead of saving.
- Scope-locked
A health coach, deliberately. It will not write your emails, and it tells you to see a doctor when that is the right answer.
Getting started
Two ways to begin.
Set up in minutes either way, and everything stays editable later.
Start with the AI
A short conversation sets you up: your goal, your phase, your day. Already tracking elsewhere? Paste what your old app knows and Kata turns it into a sheet you approve line by line.
Enter it yourself
Prefer forms? A classic profile flow instead: your metrics, your goal, your training and your preferences, step by step and at your own pace, with nothing to talk through.
The whole picture
Every part of your health,
in one place.
Six places hold all of it: Today, Focus, Activity, Nutrition, Sleep and Mind. Stay in the conversation, or open the data view and edit by hand. Same app, one tap apart.
Chat view
Talk, log and ask. Kata handles the structure behind your words.
Data view
Open the numbers: profile, entries, charts and history, all editable by hand.
Every day
Nutrition
Log meals by text, by voice or, with Kata Plus, by photo. Calories and the full macros on clean charts, your recent meals one tap away, fiber and salt in view when you want them.
Activity
Sets, weights and reps in a real workout player, prefilled from last time, with strain and a progression that reads your own history to suggest the next step.
Water
A target computed fresh each morning from your weight and your training load. Log a glass in three words and watch the day fill up.
Sleep
Hours, stages, sleep debt, night waking and naps, pulled in from your wearable or logged by hand. Kata reads how you slept before it plans your day.
Recovery
Recovery, HRV and resting heart rate arrive from your connections overnight and shape what Kata asks of you today.
Supplements
A section inside Nutrition, where everything that goes in belongs: morning and evening stacks, one-tap take-all, intake times and a clean adherence chart.
Your day, and the long line
Your day
One live day score made of equal parts, a short line from Kata in the morning, a timeline of everything you logged, and a one-tap review that closes the day.
Trends & charts
Weight, calories, macros, sleep, strain, water and adherence as live charts. Weight reads as a smoothed trend, so one heavy dinner never counts as failure.
Physique
Guided progress photos at the same angles and in the same light, laid side by side, next to the weight and protein trends behind the change.
Measurements
Waist, hips, arms, chest and more, captured with guided prompts and charted over time, so the tape tells the same honest story as the scale.
Focus areas
Name what matters right now and track it your way: a plus for more, a minus for less, and honest reduction trackers, for things like cigarettes, that count down.
Any day, reopened
Page back to any day you have ever logged. Weight, water, food, training, supplements, sleep and Mind are all editable there, your wearable figures beside them.
Handled with care
Medications
Schedules, intake and refills, treated as especially private: the names stay with you, and one refill reminder arrives about a week ahead.
Cycle
An opt-in cycle tracker with phase-aware coaching built on your own logged cycles. The log itself never leaves your device.
All of it stays one question away: ask what happened, what changed, or what to do next, and Kata answers from your own numbers.
Mind
How you are.
Not what you tracked.
You never rate your mood on a scale. Kata asks about your day in ordinary words, reads your answer beside your sleep, your training and your wearable, and gives your mind a reading of its own.
Four pillars
Focus, Energy, Stress and Calm, answered in your own words in a short check-in and drawn as four dials. A pillar with nothing behind it stays empty.
Stress, read twice
What you said and what your body measured sit side by side and are never averaged. When the two disagree, that is the interesting part, and Kata says so.
Mind recovery
All four pillars become one recovery reading with a plain line under it: recovered, steady, protect today, ease off. Recovery for your head, not your legs.
Inner weather
Clear, balanced, busy, overloaded or storm, drawn as a Kata mark and never an emoji. It appears only when your sleep, a session or a signal backs it up.
What changed
One observation in the morning, and only one: a run of calm days, a pillar that genuinely moved. If there is nothing true to say, the panel is not there.
Patterns, honestly
Calmer days after early nights, sharper focus on the days you trained. It needs weeks before it speaks, and counts days instead of inventing percentages.
Part of your day
A mind check-in is one of the equal parts your day score is made of. It shows on Today, on any day you reopen, in your week and in the Sensei letters.
Your words stay here
The four answers are what Kata reads. The note you write beside them never leaves your phone: not to the AI, not into a summary, not into a letter.
Practices stay in Focus
Meditate, Journal, Breathwork and the breathing pacer are things you choose and count, so they live in Focus. Focus is what you work on. Mind is how you are.
Kata is a coach, not a medical or crisis service. It observes patterns, never diagnoses, and always points you to real help when you need it.
Blood work
Kata can read paper.
Photograph a lab report and Kata reads it with you, marker by marker: value, unit and the reference range exactly as printed. Nothing is stored until you have checked every line. Reading a photo comes with Kata Plus.
Find a test near you
Real labs and check-up centers on a map, sorted by distance. You book with the provider yourself. Zurich is live, with more cities to follow.
The review sheet
Every value comes back as an editable row you confirm, correct or drop. Blood work always waits for you, even with automatic saving on.
Doctor's letters
A findings or referral letter is never mined for numbers. You get the forward-looking context in plain words, and the reading stays your doctor's.
Menus, read in the moment
Photograph a restaurant menu and get advice for your phase, your goals and today's numbers. Comes with Kata Plus, and nothing from a menu is stored.
The hard rules
- In range and out of range come only from the report's own printed ranges. Kata never supplies one from memory.
- Contextualize, never diagnose. An unusual value is framed in context, and your doctor owns the reading.
- Your values live on your phone, never on our servers and never in analytics. They travel only as context for a question you ask Kata, or in a share you create yourself.
The scanner
A score that is yours,
not the internet's.
Open the scanner and the camera is already reading. The facts come from Open Food Facts, while the score is computed on your phone against your goals and your phase, so the same product reads differently for two people.
- The camera is the screenA live frame does the reading. No barcode, or one too worn to catch? Photograph the label instead, or type the digits.
- Why, for youEvery score arrives with a handful of plain reasons written for your situation, not a badge you have to interpret.
- Allergies come firstAnything you have told Kata you react to outranks everything else in the read, and says so in the first line.
- Straight into your dayHappy with it? Log it as food in one tap, macros already filled in. Your recent scans stay on your phone.
Personal and adaptive
One system.
Shaped to you.
The 型 idea made literal: everyone gets the same reliable Kata, and no two people get the same one.
- Built for the everydayTuned for routines, phases and real life, not general chat. Several large models behind the scenes, the right one picked for the moment.
- It mirrors youTwo dry words get two sharp lines back. Ask it to be shorter, or to stop suggesting runs, and it holds across sessions.
- Knows you, privatelyYour logs, chats, memory and photos live on your device. A message goes to the AI only to make the reply: Kata's servers keep no copy, and the AI provider deletes it within 30 days and never trains on it.
Reminders from your own data
Set your own reminders, or ask for a nudge in plain words and, with Kata Plus, Kata schedules a real notification. When your last 30 days show a pattern, it suggests one. Daily rhythm, coaching and the weekly check-in are yours to switch on or off, and quiet hours hold.
Your language, spoken
English, German, French, Italian, Spanish and Swedish, in writing and by voice. Units follow your region, metric or imperial, and switch any time.
Memory you can read
What Kata remembers about you is a list, not a black box. Correct it, add to it, or tell it to forget, and it holds from then on.
Locked in
Every confirmed card lands in your Kata log, with its category and date. Read it, edit it, undo it. Nothing changes without a trace.
What Kata knows about me
One page lists every fact Kata holds about you, each with where it came from: told, imported, observed. Delete any of it on the spot.
Your archetype
Your recent weeks read into one orbital picture and one archetype, computed on your device. Tap any node to jump to the area behind it.
Rituals
A week that closes.
Chapters that keep.
Practice needs rhythm. Weeks close, phases become chapters, and rare letters mark what is genuinely earned.
The Weekly Kata
Every Sunday evening, the week closes: your days, sessions, protein, sleep and mind in one picture, one honest insight, and one intention you carry into the next.
Seasons
When a phase ends, it becomes a kept chapter: a cut, a build, a hold, a peak, with its honest numbers frozen at close. Your year gets a shelf.
Sensei letters
Rarely, when something is truly earned, a letter arrives: written for you, in your language, never routine. At most a handful a year, and it stays on your device.
In Mégane's voice
Kata
checks in.
Kata speaks in an AI voice made from the voice of Mégane, who built it: in a live, hands-free conversation and in the moments that matter, in all six of its languages. Kata writes every word.
Talk to Kata
Start Talk and have a live, spoken conversation, the way you would with a person. Apple's speech recognition on iPhone, your phone's speech recognizer on Android, or your browser's on the web, turns your voice into text, so Kata receives words, never a recording.
A note from Kata, in Mégane's voice
A real milestone, a thinner stretch, a few days away: moments like these bring a short voice note to your chat. Rare by design, and the setting Voice notes in Mégane's voice decides whether they reach you.
Your week, read aloud
One tap and your Weekly Kata or a Sensei letter is read to you in Mégane's voice: unhurried, and yours to play whenever you want it.
Kata voices and Talk come with Kata Plus, 60 spoken replies a month, and Kata Unlimited, 400 a month, fair use; a replay never counts, and Kata never falls back to your phone's own voice. From 16 November every account starts with 30 days of Kata Plus, and everything you track stays free forever.
Kata Duo
Practice is easier
together.
Share your form with someone you trust. One small dot a day each: kept the day, or not. Never your logs, never your numbers, no feed and no nudges. Up to five duos at once, and either side can end one at any time.
- Kept the day
- Not this time
- Nothing logged
Apple Watch
Raise your wrist.
Say it.
A native watch app, not a mirrored screen. Home is the breathing Kata circle with one invitation under it: tap and talk.
- Tap to talkOne tap on the circle opens dictation. Ask, and Kata answers in a line or two, reading the heart rate and HRV your watch measures, because a wrist is a glance.
- The same conversationThe watch opens on the thread you left on your phone, and every exchange from your wrist lands back in it. Mention a meal or a session on the wrist and it waits on your iPhone as a card to lock in: the watch itself never saves anything.
- ComplicationsScore, protein, water, move or your streak on the face, a rectangular view of your day, your Duo and one tap to ask Kata. Tap any of them and you land in the right place.
- Your day, at a glanceScore, move, exercise and protein, today's water and training, and your vitals. Turn the crown to scrub the last six hours.
The watch takes over the session from your paired iPhone, with an email sign-in as the fallback. It reads your health data and never writes to it.
Connections
Bring your wearables in.
Connect your devices and their data flows into your day on its own. Your own entries always win: log something by hand and no importer will touch it. A workout that arrives shows up as a detected activity you log with one tap.
WHOOP
Recovery, sleep, strain, HRV, resting heart rate, skin temperature and your workouts come in and shape today's plan. They pass through Kata's proxy without being stored, and the connection is bound to your account.
Apple Health
On iPhone, Apple Health brings in steps, energy, workouts, sleep, weight, heart rate, resting heart rate, HRV, respiratory rate, blood oxygen, VO2 max, height, body fat, lean mass, nutrition, water and wrist temperature.
Health Connect
On Android, Health Connect brings in steps, active energy, distance, workouts, heart rate, resting heart rate, HRV, sleep, weight and height, from up to 30 days before you connect it. Kata only reads and never writes back.
Strava
In the worksNot connectable yet. When it lands, it will be read-only, so your runs and rides flow in and Kata never writes anything back.
Sign in with Apple, with Google, or with a magic link to your inbox. A password is optional, not a requirement.
Your data
Yours, and built
to stay that way.
Kata is local-first. Your logs, your chats, Kata's memory, your photos and your seasons live on the device you use them on. No ads, no reselling, no exceptions.
On your device
Everything personal stays where you put it. Your message goes to the AI to make the reply: Kata's servers keep no copy, and the AI provider deletes it within 30 days without training on it.
Backup & restore
On iPhone, Kata writes a backup file, photos included and Apple Health values left out, that your phone's own iCloud backup carries; export a copy any time. On Android, backup files on the phone can travel with your own Google backup. On the web and on Android, one sealed snapshot opens with your recovery code.
Export, any time
Take everything with you as CSV files or a clean PDF report, rendered on your device. Your data is yours to walk away with.
The secured share
Send a doctor a summary you previewed yourself: encrypted before it leaves, so our server only holds ciphertext, and it expires on its own.
FAQ
Fair questions, straight answers.
How does voice input work?
Tap the microphone and talk: Apple's speech recognition on iPhone, your phone's speech recognizer on Android, or your browser's on the web, turns your words into text, and Kata handles it exactly like a typed message, so “big glass of water and 20 minutes on the bike” becomes two entries to confirm. People use it while cooking, walking or driving. With Kata Plus and Kata Unlimited, replies can also be read aloud in a Kata voice, Mégane's or another you choose, in your language; Kata never uses your phone's own voice. For a whole spoken conversation, start Talk.
Which AI model runs Kata?
Kata runs on our own coaching intelligence, Kata AI, included in every plan. Behind the scenes it uses several large language models and picks the right one for the moment. It reads your data on your device, can render charts from your own numbers in the chat, and checks the web when facts matter.
Does Kata adapt to how I write and live?
Yes, and that is most of its value. It learns your shorthand (“the usual shake” means your shake), your schedule, your lifts, the way you talk about hard days. Decisions land in a memory you can read and edit, so Kata becomes more your own over time without ever guessing in the dark.
Which integrations does Kata support?
WHOOP, Apple Health and Health Connect. From WHOOP: recovery, sleep, strain, HRV, resting heart rate, skin temperature and workouts, passed through Kata's proxy without being stored, on a connection bound to your account. From Apple Health, on iPhone: steps, energy, workouts, sleep, weight, heart rate, resting heart rate, HRV, respiratory rate, blood oxygen, VO2 max, height, body fat, lean mass, nutrition, water and wrist temperature. From Health Connect, on Android: steps, active energy, distance, workouts, heart rate, resting heart rate, HRV, sleep, weight and height. Kata only reads from both and never writes back. Your own entries always take priority and Kata's servers never keep a copy; when you ask Kata something, the values that question needs go to the AI provider with it. Details in the integration docs.
Is Kata a mobile app?
Yes, on iPhone and Android, and it is built for the phone first: notifications, nudges and your whole day where you expect them, plus the widgets and the Apple Watch app on iPhone. Kata will also open in your browser on any computer, on the same account; your logs live on the device you make them on, so phone and browser keep separate records.
How do I get Kata on my phone?
Not yet, and we will not pretend otherwise. The iPhone app, with its Apple Watch app included, and the Android app open with the doors, on the same day as the web app. Join the waitlist and we will tell you the moment yours lands. Step-by-step help lives in the docs.
How do I back up my data?
On iPhone, Kata writes a backup file to the app's own Documents folder, photos included and Apple Health values left out, and your phone's own iCloud backup carries it like any other app data. Nothing restores itself when you sign in on a new phone: you restore that file in the app. The built-in JSON export gives you one complete file any time, to keep wherever you like. On Android, Kata writes backup files to its own storage on your phone, photos included and Health Connect values left out, and your own Google backup can carry them. In the web app and the Android app, Kata also keeps one restore snapshot of your account, sealed on your device before it goes, and your recovery code opens it in a new browser or on a new phone, so keep that code somewhere safe.
Which devices and browsers work?
Kata is built for iPhone and Android, and for any computer in Chrome, Safari, Edge or Firefox. There is no live sync: your data lives on the device you are using, and two devices used side by side will not merge. On a new iPhone the backup file returns with your phone's own backup and you restore it in the app; on a new Android phone or in a new browser, the sealed snapshot opens with your recovery code. Proper sync is on the roadmap and will be announced honestly.
What is Talk?
Talk is a live, spoken conversation with Kata. Start it, speak, and Kata answers out loud in a Kata voice, Mégane's or another you choose, in your language. Your voice becomes text through Apple's speech recognition on iPhone, your phone's speech recognizer on Android or your browser's on the web, so Kata receives words, never a recording. Talk comes with Kata Plus and Kata Unlimited: every spoken reply counts toward the monthly voice allowance, 60 on Plus and 400 on Unlimited, fair use.
What are the voice notes in Mégane's voice?
Mégane is a founder of Kata, and Kata speaks in an AI voice made from hers, with her consent. Now and then, after a real milestone, after a thinner stretch or when you have been away a while, a short voice note from Kata lands in your chat: written by Kata and spoken in that voice, never a recording of her. They are rare by design, and the notification setting Voice notes in Mégane's voice decides whether they reach you. Like every Kata voice, they come with Kata Plus and Kata Unlimited.
Does Kata work on Apple Watch?
Yes, with a native watch app that comes with the iPhone app. Tap the circle and ask: Kata answers in a line or two, reading the heart rate and HRV your watch measures. There is a Today glance, and complications for your score, protein, water, move and streak, a rectangular view of your day, your Duo and one tap to ask Kata. The watch takes over the session from your iPhone, with an email sign-in as the fallback. What you mention on the wrist waits on your iPhone as a card to lock in: the watch itself never saves anything.
Can I use Apple Health on the web or on Android?
No. Apple Health lives on the iPhone, so Kata reads it in the iPhone app only, never in the web app. On Android, Kata reads Health Connect, its Android counterpart, instead. When you ask Kata something, the Apple Health or Health Connect values that question needs go to the AI provider with it, and Kata never stores them.
Try them all.
Start free: everything is included until 15 November, then every account gets 30 days of Kata Plus. Set up in one conversation. It grows by invitation too: 3 months of Kata Plus for every friend who joins, up to 12 a year, and 1 free month for them.