Hello Sr., how are you ?
I'm Jorge, from Argentina; a Systems Engineer who is here, in Freelancer since 2013.
I'd like to invite you to take a look at my Portfolio to know my last jobs and reviews from my clients. Then, if you are interested, would be great to discuss more in deep, your thoughts about this project and what kind of app I could develop to satisfied your requirements.
I'll be waiting for your contact.
Have a nice night there.
Regards.
Jorge.