People keep saying this but I've never seen one of these app-specific paste widgets. And even if I did, I wouldn't miss it in the slightest for the sake of not allowing every app to be reading my clipboard at all times.
It's inexcusable to me that there isn't a permissions prompt for this. Two of my most common types copy-pasted strings are URLs and passwords.
IIRC having an address (or address-looking string) in your clipboard will cause it to show up as the first result on the search screen in Google Maps.
As well as the “Address you copied” iOS Google Maps search field feature?
However, it seems like there should still be a way to provide nearly as much convenience to users while still protecting their privacy.
Here’s one:
Both pocket and instapaper will prompt if open with a link in your clipboard.
Several reddit clients as well, I’ve seen in on narwhal and the Apollo dev explicitly noted they do that in the corresponding Reddit thread.
The Google Translate app does.