Keld AI Health Patterns

Keld began as a personal weather service for your body. It became something no one has built before: a living atlas of you.

Keld reads your health signals — HRV, resting heart rate, sleep, workouts and recovery, from Apple Watch and anything else that feeds Apple Health — and fuses them with the world you live in: weather, air quality, pollen, sunlight, the moon, the places you go. Then it hunts for the patterns where your body and your world move together.

KNOW YOUR USUAL
Bounds learns what is normal for you in each part of your day — your evenings are not your nights — and shows when a signal like your HRV has left that range, which way, and for how long. One odd reading stays quiet; a run of them is recorded. Keld never calls a reading good or bad: it tells you how far from your own usual you are.

YOUR DAY ON ONE PAGE
Pulse opens on a grid of tiles you arrange yourself: workouts, streak and goals, the next 24 hours of weather, what Keld sees coming, tonight's sky, your usual places, and how your record compares.

BUILT FOR YOUR TRAINING
Every workout gets its own history, led by the stats that session recorded — distance, strokes, pace, heart rate, elevation, energy. Set goals per activity and watch them fill.

YOUR FIELD GUIDE
Every proven pattern becomes an Elemental — it earns a name, engraved artwork, and for strong patterns a living creature. Your heart running with the air pressure. Your sleep moving with the daylight. Each is sorted honestly by strength — Beacon, Signal, Pattern, Whisper, Noise — and your collection is unlike anyone else's. When Elementals rise and fall together, Keld groups them into Nodes.

ASK AI ABOUT YOUR OWN DATA
Ask in your own words. Keld answers from what it has measured about you, with charts, and says so plainly when your record cannot answer.

THE KELD LIBRARY
Your whole guide as one dated volume, story pages for every signal and Elemental, your questions and answers, and how things changed over time. Read them in the app or save them as a PDF.

THE ATLAS AND THE METRIC INDEX
Your places, routes and signals drawn as maps. Browse every measurement Keld watches — 150+ body signals plus weather, air, sun, moon, space weather and your places — each with its own card and charts.

FORECASTS THAT EARN YOUR TRUST
Keld measures how far ahead each of your signals can honestly be forecast, forecasts only that far, and shows the track record behind every prediction. Forecasts need location access set to Always.

SAGAS, FILMS AND CARDS
Narrated films built from your real data and picture cards you can share from any screen.

YOUR VOICE
Rate your patterns for importance and fascination — anonymously helping everyone find what matters — and see how many people share each one in the Census.

HONEST BY DESIGN
Every number says exactly what it is. Weak evidence is labeled weak. Keld describes what was observed in your own data — never claims about cause.

PRIVATE BY DESIGN
All pattern-finding runs on your device. No raw biometric data of yours is shared by us to anybody. Your Field Guide backs up to your own private iCloud. Signing in with Apple is optional.

YOUR FREE MONTH AND KELD+
Your first 30 days include everything, with an allowance of AI stories and questions. After day 30 Keld pauses: it stops reading new data and stops learning. Nothing is deleted and you can still export everything. Subscribing resumes where it left off. Keld+ keeps Keld learning and lifts the limits on AI stories: $9.99/month or $99.99/year, with a 7-day free trial from Apple (auto-renewing, cancel anytime in Settings).

Keld is not a medical device and does not diagnose, treat, or predict medical conditions.

Privacy Policy: https://www.keld.us/privacy
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Kelda is Old Norse for wellspring. Your body's sunstone.