I have an in-house app which I distribute over a local wifi
in release page have a link like this
itms-services://?action=download-manifest&url=h
This worked for me in iOS 8.0. Simply use https
for URLs.
On the 7.1 update all software installation services are forced to use the HTTPS protocol, also covering non-standard itms-services:// URLs.
You need to change the protocol type:
For more detail and how to get a certificate go to: Fix certificate error on iOS 7
It seems Apple have disabled all URL schemas in iOS7 (including mailto: links) in standalone webapps. This has seriously implications for my place of work.
See this post: https://discussions.apple.com/thread/5385948?start=0&tstart=0