I have more than 3 Years of Experience in developing many Mobile apps.
I also had enough experience in the development of iPhone, Android Native Apps.
I have enough experience working with Xamarin in both approaches either Xamarian Forms or Xamarin Native.
I will provide Complete Solution in following Domains according to Your Requirements:
Payment gateway based app
Email based app
Google Map app
Chatting and location sharing
Camera based apps
Dropbox based App
Calendar based App
Task Management App
Alarm based App
Exams / Quiz
Push Notifications (& Individual Notifications)
Actual price of app will depend upon your requirement.