ShiftRhythm vs Plumb

Night shifts flipped your sleep? Enter your roster and ShiftRhythm tells you when to sleep, when to nap, and when to seek or avoid light — today. WHAT IT DOES • 24-hour body-clock dial — see your estimated melatonin onset (DLMO) and biological night (CBTmin) at a glance • Light, nap & caffeine guidance — timed to your circadian rhythm and updated as your shifts change • Sleep score, sleep debt & recovery — last night's sleep plus HRV and resting heart rate from Apple Watch, telling you whether to push or recover • Presets that match real rosters — Panama 2-2-3 schedule (day/night), Pitman, DuPont, Fire 48/96, 12-hour rotating shifts, plus Korean and Japanese patterns. Or build your own custom rotation • Melatonin timing card (optional) — an informational window based on your estimated body clock. Not a recommendation to take melatonin; talk to your doctor or pharmacist first BUILT FOR SHIFT WORKERS Whether you're a night shift nurse, a firefighter on 48/96, a plant operator on a DuPont rotation, or a driver on a rotating roster — ShiftRhythm adapts to your schedule, not the other way around. • Tap any calendar day to correct that day's shift • Works from your schedule alone — no Apple Watch required • Apple Watch app and widgets included; available in English, Spanish, Korean, and Japanese PRIVATE BY DESIGN • No account. No server. Your data stays on your phone. • All circadian math runs on-device — health data never leaves your iPhone • No ads, no tracking PRICING • 30-day free trial — full features, no account needed • Then Monthly or Annual (Annual saves vs. monthly), or a one-time Lifetime purchase if you'd rather not subscribe • Subscriptions auto-renew; cancel anytime in Settings > Apple Account > Subscriptions Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://yoonspower.github.io/shiftrhythm/privacy.html ShiftRhythm is for general wellness and reference only. It is not a medical device and does not diagnose, treat, or monitor any medical condition. Values shown are estimates and may be inaccurate. Consult a professional for health concerns.

Sit tall, without thinking about it. Plumb is a calm, private posture-awareness companion. It learns the comfortable "tall" you set for yourself, gently notices when your head drifts forward, and nudges you to ease back — at your desk, or hands-free through your AirPods. A prompt to notice, not a verdict. Plumb learns your neutral, not a textbook ideal — and the fastest way to lose your trust would be to overclaim, so it stays plain-spoken about what it can and can't do. TWO WAYS TO USE IT Hands-free with AirPods — the everyday mode. Plumb reads your head position from compatible AirPods or Beats, so your phone can stay pocketed or locked. A soft tone cues you the moment you drift past your own threshold, and goes quiet the instant you ease back. Camera at your desk — the screen-attended alternative. The front TrueDepth camera reads your head position at desk distance — and your shoulders when they're in view. Frames are processed in the moment and immediately discarded — never previewed, saved, or uploaded. It can't see your lower back, and we won't pretend otherwise. CALM BY DESIGN • A gentle nudge — a soft tone, a tap, or both. It gets slightly more insistent on a long slump, and stops the moment you ease back. • Breathing and small shifts inside your neutral zone never count. • A "held tall" timer tracks your time in a comfortable position. • A stylised living figure reflects how you're holding your head — no camera image or video is ever stored or shown back. • Insights answers one honest question: am I improving? A clear average, an honest change once there's enough history, and quiet days left as blank space, never guessed. • Learn — six short, evidence-anchored reads on why noticing your posture matters, each with its limits stated plainly. YOUR POSTURE NEVER LEAVES YOUR PHONE • Everything is analysed on your device. There are no Plumb servers and no backend — there's nothing to send. • No account, ever. No sign-up, no email, no login. • No ads, no trackers, no analytics, no third-party SDKs. • iCloud sync is off by default and opt-in; it goes only to your own private iCloud. • Apple Health is write-only — Plumb can log a Mindful Minutes session and never reads your health data. SIMPLE, TIME-METERED PRICING Time is the only free meter — no feature walls. Free, forever: one check-in a day across both modes, up to five minutes, with the full nudge experience, the pain log, your two-week Insights window, and the whole Learn library. Plumb+ unlocks unlimited check-ins at any length, the hands-free Live Activity on your Lock Screen and Dynamic Island, Month and Year Insights, and CSV / PDF export. Plumb+ comes three ways: Weekly, Annual (with a 7-day free trial), or a one-time Lifetime unlock. You'll always see the exact price for your region on the subscription screen before anything is charged. Subscriptions are billed through your Apple Account; cancel anytime in App Store → Subscriptions. Trial eligibility is decided by Apple. Made with care, and localised into nine languages. Plumb is a wellness and posture-awareness tool, not a medical device. It does not diagnose, treat, cure, or prevent any condition. If you have a health concern, please speak to a qualified professional. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/