Dear Sir,
I have read your Project description & as you know that UBER is very famous, it has loads of features & if you want Website, iPhone & Android App, Back-end & WebServices, then cost can go even higher than US $15,000 but again if you have your own custom list of features, then we can give you our precise estimate.
Our current bid is just a placeholder since Freelancer requires it but once you respond us, we can then finalize the total cost & payment terms to move forward.
Look forward to hearing from you.
Regards,
YK
LEADconcept