Hello Gentleman,
Greetings!!
We have a strong and highly experienced team of PhoneGap ( Cross platform iOS/Android App development hybrid technology ) developers who possess sound and extensive knowledge of HTML5, CSS3, JQuery, JavaScript, Cordova, PhoneGap, etc.
So please be assured that we can modify your existing App with all your request.
Kindly review one of our previous Cross platform IOS / ANDROID App development work and feedback from the client :
https://www.freelancer.com/projects/phonegap/PhoneGap-Work/
So please revert back to us to discuss further. We are looking forward to forge a long time working relationship with you.
Thank you
Warm regards
Steve Park