Undercurrent vs NailPause

You know something is off, but what? Headaches that seem random. Energy that crashes for no reason. You suspect a pattern, but every time the doctor asks "have you noticed any patterns?" you draw a blank. Undercurrent is a private symptom log and food diary for the small things, and the patterns hiding inside them. Use it as a headache log, a food symptom diary, or a flare journal for a chronic illness. LOG IN FOUR TAPS OR FEWER Symptoms, food, medications, activities, and observations. Quick chips for what you log most. Voice if you'd rather. Or just tell the on-device AI assistant in plain language: "headache after lunch" and it handles the rest. WHAT WE'VE NOTICED Once you've logged enough events, the Insights page surfaces co-occurrences in your own data, phrased in soft language. None of it claims to cause anything. You decide if it's signal or noise. • Pre-window pattern: what tends to show up in the hours before symptoms • Time-of-day cluster: when symptoms tend to gather • Day-of-week peak: which days run hottest • Recurring sequence: a familiar arc, repeated • Co-occurrence: tags that appear alongside symptoms • Seasonality: a year, at a glance (Pro) • Environment: weather, barometric pressure, humidity, air quality, for migraine weather and pressure patterns (Pro) • Long-term cycles and intervention effectiveness (Pro) A REPORT YOU CAN HAND TO YOUR CLINICIAN One tap exports an editorial PDF: auto-numbered observations, frequency tables, time-of-day distributions, and an event log. Black-and-white printable, sized for a five-minute appointment. No portal login on the other end. READINGS: GLUCOSE, HEART RATE, BLOOD PRESSURE, WEIGHT Your numbers sit on the same timeline as everything you log. Log a reading by hand in a couple of taps, or import from Apple Health with Pro, including a CGM's glucose every five minutes. ON YOUR WRIST Log what you log most with one tap on Apple Watch. Set severity with the Digital Crown, mark a symptom improved later, or start from its watch face complication. MEDICINE CABINET AND PILL BOX Set a dose schedule once and the medications you take regularly log themselves. A daily pill box shows what's taken and what's still due. APPLE HEALTH INTEGRATION Pull in workouts, mindful sessions, and readings automatically (Pro). TRACK MULTIPLE PEOPLE (PRO) Separate threads for yourself, your kids, or anyone you care for. 100% PRIVATE BY DEFAULT • No account required, start logging immediately • All data stored locally on your device • AI runs on-device using Apple Intelligence; nothing is sent to a server to be analysed • Optional iCloud backup, protected by Apple's encryption • No analytics, no tracking, no ads BUILT ON PUBLISHED RESEARCH Across 85 clinical studies, self-monitoring was the most effective technique in digital health interventions for chronic conditions. FREE FOREVER • Unlimited logging, medicine cabinet, and manual readings • Today, Timeline, and Calendar views • AI chat assistant for plain-language logging • Basic Insights: pre-window, time-of-day, day-of-week, sequences, co-occurrences UNDERCURRENT PRO · ONE-TIME PURCHASE · $19.99 Pay once, keep everything forever. No subscription, no recurring charges. • Weather, pressure, and humidity correlations • Long-term cycles, seasonality, intervention effectiveness • Full clinician PDF report • Multiple people • Apple Health sync, including CGM glucose • iCloud backup Whether it's what shows up before your migraines or which foods leave you uncomfortable, Undercurrent gives you a quiet place to write it down. NOT A MEDICAL DEVICE Undercurrent describes statistical co-occurrences in your self-logged data. It is not intended to diagnose, treat, cure, or prevent any disease. Observations are informational only, not medical advice. Always consult a qualified healthcare professional about symptoms, medications, or treatment decisions. In an emergency, call your local emergency number. Notice what's quietly shaping how you feel.

Catch the urge before the bite. NailPause gives you a private 60-second reset when nail biting or cuticle picking starts to feel automatic. Notice the urge, choose a practical response, and make gradual recovery visible—without shame or all-or-nothing pressure. RESPOND IN THE MOMENT • Start a 60-second reset from the app, Home Screen, or Lock Screen • Choose a practical hands-on response • Note the trigger and urge intensity • Keep core resets unlimited on the free plan FOLLOW A PLAN BUILT AROUND YOU Tell NailPause what matters to you, when urges are most likely, and which response feels realistic. Your first 7-day plan turns those answers into small daily actions. Pro continues the complete 28-day guided Journey and adapts your next week using your real check-ins. UNDERSTAND YOUR PATTERNS See when urges are most likely, which triggers keep returning, and which responses help most. NailPause creates simple insights only from the information you choose to record. MAKE NAIL RECOVERY VISIBLE Take consistent nail and cuticle photos, compare progress side by side, and create a private on-device timelapse with Pro. Your recovery photos are not uploaded. FREE INCLUDES • Unlimited instant resets • Daily reflection and reminders • Care plant and Care Points • The first 7 Journey days • Up to 2 recovery photos • A 7-day reflection summary • Home Screen and Lock Screen widgets NAILPAUSE PRO ADDS • The complete 28-day Journey • 30 days of reflection history • Highest-risk-window and recurring-trigger insights • Trigger-aware reset recommendations • All five reset techniques • Weekly adaptive guidance • More recovery photos • Side-by-side comparison and an on-device timelapse PRIVATE BY DESIGN No account is required. Your plan, check-ins, notes, and recovery photos stay on your device. NailPause has no advertising or cross-app tracking. NailPause is a self-help and educational tool. It does not diagnose, treat, or replace care from a qualified health professional. Take the first pause today. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/