Menstrual Cycle Tracker with Subscription Service

I'm seeking an experienced app developer to create a cross-platform (iOS and Android) menstrual cycle tracking application. This app will feature a subscription service that sends monthly care packages. Key Features: - Tracking: The app should provide ovulation predictions, symptom tracking and custom reminders. - Subscription Plans: The app should facilitate a subscription service with both monthly and annual plans. Ideal Skills: - Cross-platform app development - Experience with subscription-based services - Knowledge in health-related app development Please bid if you can deliver a high-quality product that meets these requirements.