Hello,
I understood that you need Salesforce App Exchange .
I have gone through the details of your project,I am capable to do this project.
# I HAVE SOME QUERIES,PLEASE GIVE ANSWERS..
1-Do you need both Android app and IOS app?
2-Do you have UI/UX designs?
3-Do you need from scratch?
4-What about the server hosting?
Looking forward to hear from you.
Regards,
Amlesh