Dear Client.
Your job really caught my eyes because my experience and expertise are perfect match for your job.
I have expertise technical experience of mobile app development with best practical solutions for 6 years.
I'm fully dedicate onto your project, can devote my full time to complete the job on time.
Anyway I am 100% sure that my services for you will become part of my portfolio and your feedback will support me in future job applications.
I would be happy to provide further information at interview.
All I can say is that I hope I have demonstrated to you my interest and motivation to get involved in your project.
Best Regards.
Wang.