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.
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.
Dear employer. Your requirements are all clear to understand. I have enough experience in this part. But I have some question about your project. So please reply as soon as possible. I promise you high quality result. And our work will greatly make you happy.
Best Regards.