Dear Sir,
I reviewed your attached file and I am quite sure that we can handle this job.
We have a team which has strong experience in iOS, Android and front-end, backend development.
Most of the team members have over 5 year experience and are senior developers at the moment So you can set your mind at rest about the quality and timeline of our project. Let's talk further via Skype. My ID is darknessman1206.
Thanks for your time. Hope to have chance working with you.
Loi