OpenSleep vs Night Ledger

OpenSleep tracks your sleep stages without a watch or ring, and explains them with an AI sleep coach that runs entirely on your iPhone. TRACK SLEEP WITHOUT A WEARABLE Choose how your phone listens to the night: • Sonar (contactless): leave your iPhone on the nightstand. OpenSleep uses ambient sound levels to pick up sleep cues. Raw audio is never recorded or stored. • Mattress mode: place your iPhone flat on the mattress next to your pillow and let the motion sensor follow your movement. SEE EVERY STAGE OF YOUR NIGHT • Awake, REM, light and deep sleep, shown on a stage ring and a full-night sleep pattern chart • Bedtime, wake-up time and total sleep for every session • History with day, week, month and year views to spot trends AN AI SLEEP COACH THAT STAYS ON YOUR PHONE Ask about your sleep, your routine or why you wake up tired. The coach is a large language model that runs on your device, so your questions and answers are never sent to a server. Download the model once, then chat even with no connection. WORKS WITH APPLE HEALTH OpenSleep writes your sleep sessions and stages to Apple Health and can show sleep already recorded there. PRIVATE BY DESIGN • No account and no sign-up • Sleep analysis happens on your iPhone • Open source: anyone can read the code Available in 22 languages. Sleep tracking is free. The AI Sleep Coach is a one-time purchase with no subscription. OpenSleep is a wellness tool, not a medical device. Talk to a doctor about any sleep or health concerns.

Night Ledger is a personal sleep diary for iPhone, built hand in hand with a sleep medicine clinician to help people understand their sleep patterns to sleep better. Log last night’s sleep in the morning, keep a personal history, and export a report when you want to share it with your clinician, therapist, or care team. Everything stays on your device. There is no account, no iCloud sync, no analytics, and nothing is uploaded. You can save a complete morning log, keep a draft, skip a day, or edit later. Trends cover 14, 28, and 90 days. Exports include PDF, CSV, and JSON. Reminders are local. Night Ledger was designed with real clinical sleep diary workflows in mind, including insomnia care, CBT-I support, and sleep efficiency tracking. Night Ledger does not diagnose, treat, prescribe, or recommend. It does not give medication guidance. It is a private tracking tool to help you organize your sleep information and review it with a qualified clinician when appropriate.