New · watchOS

AstroTeks

A planetarium on your wrist. Free.
AstroTeks on Apple Watch — Pulse
Standalone. Runs entirely on the Watch. Nothing leaves your wrist.
The metric that didn't exist

Heart-Sky Sync.

Four sensors, fused into one.
AstroTeks Heart-Sky Sync gauge
A personal coherence score built live from HRV (40%), heart rate (30%), blood oxygen (15%), and respiratory rate (15%). For reflection and mindfulness — not a medical measurement.
Guided breathwork

The Moon paces your breath.

AstroTeks Lunar Breath
3, 5, 10, or 20 minutes. An element-colored circle expands and contracts while the Taptic Engine paces each inhale and exhale. Sessions write to Health as mindful minutes.
Five living surfaces

Every screen breathes.

Pulse

Your main face. A living ember glow, your Heart-Sky Sync, the planetary hour, the moon a tap away.

Dawn

A quiet morning screen: moon phase, a short reflective line, yesterday's score, your coherence streak.

Heart-Sky Sync

The four-sensor gauge, updated live.

Lunar Breath

Guided breathing, anchored to the current moon phase.

Crown Scroll

Turn the Digital Crown through 14 days of sky weather, a haptic detent on each step.

Five complications

Coherence ring, Heart-Sky gauge, moon phase, planetary hour, sky weather — Smart Stack aware.

Built for the Watch, not ported to it

It uses everything.

Optical heart rate · HRV · blood oxygen · respiratory rate · Digital Crown with haptic detents · Taptic Engine · Always-On Display · HealthKit read & write · CoreLocation for planetary hours · WidgetKit complications · Extended Runtime for full breathing sessions. A full VSOP87 ephemeris runs on the chip — no server, no internet.
Private by design

Nothing leaves your wrist.

All astronomy computed on-device. All biometric data stays in Apple's Health sandbox. No accounts. No cloud. No analytics. No ads. No subscriptions. No third-party SDKs.

Free, forever.

Submitted — awaiting their first verdict. Built for you regardless.