Hi, I have 7 years experience in iOS application development with a lot of applications on Store. You can review my recent applications from my Portfolio or on Store:
https://www.freelancer.com/u/nlhdung.html
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With my experiences, I can make change for your app easily.
Please contact me, I will help you complete your requirements quickly.
Skype: nlhdung (Dung Nguyen Le Hoang)
Regards!