Nocta

About this app

What Nocta does

Nocta is a circadian-aware shift planner for the 15 million Americans who work non-traditional hours — nurses, EMTs, firefighters, factory workers, pilots, truck drivers. The science of when to sleep, when to stop drinking coffee, when to get bright light, and when to take melatonin is well-established. The problem is nobody's packaged it as a calm, account-free, one-time-purchase iPhone app — the leading product (Timeshifter) is $69.99/yr subscription and cloud-tied. Nocta fixes that. — Tap to add a shift, or pick from built-in rotation templates (3-on/4-off for nurses, Kelly schedule for firefighters, rotating fortnights, pilot duty days). — Nocta calculates your personalized day-by-day plan: anchor sleep window, caffeine cutoff time, melatonin window (if you take it), bright-light timing. — Calm passive cards on the home screen. No alarms. 'Coffee cutoff in 4h. Anchor sleep window: 14:00–17:00.' — Weekly PDF export: hand it to your partner so they don't wake you during sleep windows. — No account. No email. No data leaves your phone. One-time $9.99. The science is published in PubMed, AASM clinical guidelines, and Harvard circadian research. Nocta encodes the rules deterministically — no AI, no cloud inference, no surprises. We're not a medical device; we're a planning tool that respects published science. For every nurse who has ever stared at the bathroom ceiling at 3pm wondering why they can't fall asleep before a night shift, Nocta is the calm, private, one-time tool that finally treats you as the expert in your own life.