Lily: Period Cycle Tracker is a free iPhone app developed by Iveta Chaikovska in the Lifestyle category, specifically under Health & Fitness. The app aims to assist users in tracking their period cycles, intimate life, mood, bodily sensations, and more. One of its key features is a smart virtual assistant that provides insights based on the user's symptoms and offers solutions when needed.

With Lily, users can easily track their cycle and contraceptive use through a user-friendly interface that visualizes all data comprehensively. The app also generates visually friendly reports based on the collected data and allows tracking of weight, body feelings, and mood changes throughout the menstrual cycle phases.