Circadia

Circadia is a sleep aid for your wrist: quiet, rhythmic vibration patterns that guide your breathing or heart rate down as you drift off, with your heart rate tracked live throughout. Five session types, one goal - Classic Pulse — a steady metronome vibration at a fixed BPM, or a slow ramp from a higher to a lower BPM over time. - Resonance Breathing — paced 4s inhale / 6s exhale cycles at the classic 0.1 Hz resonance-breathing rate, with distinct taps marking each phase. - 4:8 Extended Exhale — a longer 4s inhale / 8s exhale pattern, the extended-exhale ratio used to encourage relaxation. - Adaptive Pulse — closed-loop: reads your live heart rate and gently paces the vibration just below it, smoothing out sensor noise as it goes. - Box Breathing — even 4-4-4-4 second inhale/hold/exhale/hold cycles. Live heart rate, always in view Your current heart rate sits front and center during a session, with a running delta since the session started — so you can actually see yourself settling down, not just guess. Stop conditions that make sense for sleep Set a maximum session duration, a heart-rate threshold to stop at automatically, or both. A live summary on the idle screen shows exactly what's configured before you even start. Everything on the watch, nothing on the phone All settings — session type, BPM/ramp, stop conditions, vibration strength, and an option to disable touch input entirely during a session (so a stray touch in your sleep can't cut it short) — are reachable directly from the watch by holding the Up button. No app pairing or phone required. Your session history The last 20 sessions are saved on-device: date, duration, protocol, start/ end/min/max heart rate, and how the session ended — browsable any time from the settings menu. ### Keywords sleep, sleep aid, breathing, heart rate, haptic, vibration, resonance breathing, box breathing, relaxation, bedtime, fenix, meditation

1.5 Added select timer option 1.4 Improved layout 1.3 Added option to keep screen on. Added statistic overview after session. Improved haptics. 1.2 Added 4-7-8 method and improved menu. 1.1 Added full English and Dutch language support — Circadia now displays in your watch's system language automatically.