There was a trick mentioned at our last ByMUG meeting to make using 1Password 4 on your iOS device a little easier.
There are several ways you can modify a URL to make it open directly in 1Password:
onepassword4://search/<search term> will open the app in the search mode searching for the <search term>. For example: onepassword4://search/icloud will bring up all your saved items with iCloud in them.
Add ‘op’ to any URL in your mobile browser before the http:// or https:// to have the link open in the 1Password browser. Makes it easy to switch over and login…
If you are a developer and want to add 1P support to your app the details, and code, are available in an AgileBits Blog post.