SharePoint UserProfileService.asmx for cross platform mobile application development

I'm writing an corporate iPhone/Android application which pulls information from Sharepoint 2010 UserProfileService.asmx service.

I believe I cannot use http://[servername:port]/_vti_bin/userprofileservice.asmx directly from iPhone/Android client..

I'm thinking of the following steps....

1. I have to make my UserProfileService.asmx as public service.
2. Create REST service (webAPI) which consumes UserProfileService.asmx web service.
3. Consume REST service from iPhone/Android/WP 8 apps

Looking for right direction.. Could someone assist me?