Dear sir
Thanks for your check my message.
I’m Android/iPhone TOP TOP Expert.
I am Android/iphone app honest developer that have a lot of experience in app developing.
Also I have strong experience of app develop using RESTful webservice API.
I can do it perfectly and I think this job is suitable to me perfectly.
If selected for the project, I would like to start immediately and devote my creative suggestions to your project in order to serve you better.
If you are really doubt on how fast I can complete, just give me a chance, I shall do my best.
I'm fully dedicated onto your project, can devote my full time to complete the job on time.
I can deliver high-quality result to you, fast turnaround time.
Thank you for the opportunity to submit my proposal for your project.
Best regards.