This iOS habit-change app helps people stop nail-biting and improve nail health through a structured 90-day journey grounded in habit reversal training, combining a personalized plan with daily photo tracking, bite logging, smart reminders, and progress analytics to support consistent follow-through and healthier, stronger nails over time, while remaining easy to use without heavy time commitments and allowing users to track progress across multiple devices. Key Highlights ✅ iOS app designed to help users stop nail-biting and improve nail health through a structured 90-day program ✅ Built around habit reversal training with a personalized plan to guide users day by day ✅ Daily photo tracking, bite logging, and smart reminders to support accountability and consistency ✅ Detailed analytics and personalized recommendations to help users measure progress and refine habits ✅ Designed for lightweight use without extensive commitments, with progress tracking available across multiple devices