How are you today?
I am very interested in your project.
I have read your project description very carefully.
I have being developed many mobile apps including the android and ios versions for 6 years.
I have seen your project proposal and i have found it is matching to my profile.
I can give an assurance to complete your work by the time or earlier than that.
I will be glad to do your work.
Dear Prospect Hiring Manager.
Thank you for giving me a chance to bid on your project. i am a serious bidder here and i have already worked on a similar project before and can deliver as u have mentioned