I want to edit the cost function in my on-demand delivery andriod app

Hello. I have read your description carefully and I am sure I can finish your project. I have an experience of 5 years in developing many apps in android studio. So if you give me a chance, i will use the chance and I will give you perfect product. Also I will meet your deadline correctly and I can finish your project in low price. Please contact me I will waiting for your contact. Thanks.

Hi, I have 4+years of experience and worked on many big level android apps. 2 of them are already available on play store . I have experience of editing and updating the app as per requirement . Looking forward for your response .

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 "I can do this job and give you an efficient job that will be very acceptable and presentable. I and my team work on web development and mobile apps and I can assure you that you will never be disappointed"