Local Cab App Development

I'm looking for an experienced mobile app developer to create a local cab booking app for both iOS and Android platforms. The app will only need a passenger version.

Key Features:
- Real-time GPS tracking
- Cab booking functionality
- Payment integration

Ideal Skills:
- Expertise in mobile app development for both iOS and Android
- Experience with real-time GPS tracking and payment systems
- Strong UI/UX design skills to ensure a user-friendly experience

Please provide examples of previous similar work and an estimated timeline.