Hi, Sir
I have read your description carefully and I am so interested in this project.
I understand the concern of your project and I am ready to start immediately.
I am very expert for PhoneGap and various kind of JavaScript Framework such as jQuery Mobile, Sencha Touch, Kendo UI
Also i have lots of experience for iOS and Android development.
I am fully ready for your job.
There wouldn't be problem for your requirement of updating in features or graphics changes.
I'd like to prove my perfect ability through this project.
If you select me as a contractor, I will reply good quality
I will provide good service till your satisfaction.
You won't be disappointed.
Of course, I know you could be in doubt about my real ability.
I hope this job get well and work with you for long term relationship.
Looking forward to your contact.
Thanks