CoagSafe: Warfarin & INR Log

CoagSafe is a thoughtful, privacy-first companion crafted for individuals managing long-term warfarin (Coumadin) anticoagulation therapy—including atrial fibrillation, mechanical heart valve replacement, deep vein thrombosis (DVT), and pulmonary embolism (PE). Replace fragmented paper logs and confusing pill math. CoagSafe helps you stay on top of alternating dosing schedules with one-tap thumb-bar logging, visualize INR trends and TTR metrics, sync securely across your devices via private iCloud, and export clean, one-page summaries for your medical appointments. ◆ DAILY DOSING & FLEXIBLE SCHEDULES • Manage weekly dosing regimens or alternating schedules (e.g., 3 mg / 2.5 mg every other day) with ease. • Support for ¼, ½, and whole-tablet increments with visual pill-splitting diagrams. • Automatic calculation of weekly total dose and percentage adjustments. • Bottom thumb-bar for one-tap dose logging with a 10-second undo window; long-press menu for custom adjustments, missed doses, or physician-directed holds. • Gentle catch-up banner if yesterday's dose was unrecorded. ◆ EFFORTLESS INR & TTR TRACKING • Specialized 64pt numeric keypad for swift entry (tap 2 then 4 for 2.4), paired with ±0.1 stepper buttons. • Tag result sources: hospital venous lab draw, clinic fingerstick, or home coagulometer. • Schedule your next blood test upon logging results, with timely reminders the evening before and morning of your appointment. • Accurate TTR (Time in Therapeutic Range) calculation via the Rosendaal method, highlighting in-range, high, and low percentages. ◆ SYNCHRONIZED CHARTS & LIFESTYLE EVENTS • Synchronized Swift Charts: horizontally scroll across INR target bands, daily dose bars, and blood pressure/heart rate ranges in tandem. • Log key lifestyle factors affecting anticoagulation: dietary shifts (vitamin K intake), medication changes, alcohol, illness, or minor bleeds, and view them directly on your timeline. ◆ APPLE HEALTH INTEGRATION • Seamlessly import systolic/diastolic blood pressure, pulse, and resting heart rate from Apple Health. Data imported from Health remains strictly on your local device and is never synced to iCloud. • Manually entered vitals sync across your devices via iCloud and can optionally be written back to the Health app. ◆ ONE-PAGE CLINIC REPORTS & EXPORT • Generate a clean, single-page A4 PDF report featuring your active schedule, INR trend line, detailed test history, TTR calculation, and recent lifestyle events. Perfect for doctor visits, dental procedures, and pre-op consultations. • Export raw data via CSV, or create full JSON backups with merge-restore support. ◆ PRIVACY FIRST, PRIVATE ICLOUD SYNC • Zero tracking: No accounts, no developer servers, no third-party analytics SDKs, and no ads. • Seamless multi-device sync: Your records and settings sync automatically across your devices (iPhone and iPad) via your personal private CloudKit database, inaccessible to the developer. • HealthKit privacy: Health vitals imported from Apple Health remain strictly on the local device and are excluded from iCloud sync. • Completely free with no in-app purchases or subscriptions. ◆ IMPORTANT MEDICAL DISCLAIMER CoagSafe is strictly a personal health logging and reminder tool for tracking medication intake and lab values. It does not provide medical diagnoses, treatment recommendations, dosage calculation algorithms, or clinical advice. Warfarin is a potent anticoagulant with a narrow therapeutic index; all dosage determinations and adjustments must be made under the direct care and supervision of your qualified physician or anticoagulation clinic. If you experience unusual bleeding, persistent bruising, or any adverse symptoms, seek emergency medical attention immediately.