Dear, sir!
You are looking for the world's best mobile app developer, and i'm the best mobile app developer who are very familiar with iOS and Android
Please check my work history and twoservices.net.
This is the collection of my works during 10 years.
If you hire me, you will get more benefits than you expected from the other freelancers.
I'm ready to start your work and we can discuss your requirements via Voice conversation.
Thanks