Develop a mobile application for tracking fitness activities. The app should allow users to log their workouts, monitor their progress, and set personalized goals.

Key Features:

• Workout logging (various types: running, cycling, weightlifting, etc.)
• Progress tracking and visualization
• Personalized goal setting and reminders
• Integration with wearable devices (optional)
• User-friendly interface

Technical Requirements:

Platform: Android and iOS

Programming Languages: Java/Kotlin (Android), Swift/Objective-C (iOS)