Dear Sir,
I have read Project Description & fully understood the overall flow of your Application but I think, if we can schedule one to one technical meeting along with my technical team lead, then we can be 100% sure that we both have similar understanding, because this is for our both interest to make sure that there are no misunderstanding down the road, when we are in development phase.
So, please drop me a message thru' PMB to schedule a meeting time, after that we can revise our bid.
Please check out our Freelancer profile https://www.freelancer.com/u/leadconcept.html, as we have delivered many successfully projects lately and let me know, if you want to see some of our recently developed projects.
Look forward to hearing from you.
Regards,
YK
LEADconcept