> the first app that allows you to use your iDevice as an extra display for your Mac
I stumbled upon iDisplay.com the other day. Can't recommend anything though, I'm not an apple user, I was looking for ways to replicate my android phone display in my desktop Linux.
Not really:
I tried android-screencast [1] but had to root my phone, the framerate was terrible, lots of crashes, touch gestures not really satisfying.
The other option was using genymotion, works well, but some apps can't be installed multiple times (whatsapp I'm looking at you).
If anyone knows a better way to do so, thank you in advance!
http://web.airdroid.com/ maybe? Lots of drawbacks, though, and not 1:1 mirroring I believe, so may not fit your needs. But seems to support whatsapp via screen mirroring + custom keyboard (probably?).
Haven't tested since I'm currently on iOS.
Koush's Mirror app[1] works alright with his Allcast Receiver Chrome app. The interesting thing is that using it actually revealed a (broken) second screen mode in one of the apps I use, didn't know Android had APIs for that. Perhaps it's intended for Chromecast/Miracast and whatever Mirror does looks like that.
For a little bit I was using a Nexus 10 as a secondary display - I used Google Chrome's remote desktop to view a separate X session, with Synergy for sharing my input devices between them (which is now paid for?!). Worked great, except you couldn't see the mouse cursor on the Nexus... :( Ultimately it was more annoying than helpful. (Edit: just realised that's broadcasting in the opposite direction to what you're asking for)
I stumbled upon iDisplay.com the other day. Can't recommend anything though, I'm not an apple user, I was looking for ways to replicate my android phone display in my desktop Linux.