On Windows 7, I used ZoneScreen to extend my windows desktop from my desktop PC onto my laptop and Air Display to extend my desktop on my iPad and Android phone. It worked great! 4 displays made for a productive programming environment. But since upgrading to Windows 10, I've been struggling to find a way to make this work again.
I've found a replacement for ZoneScreen with spacedesk; the current free BETA works to extend my windows desktop onto my laptop and is licensed til Dec 2016.
However, I've not had much success with extending Windows 10 desktop to Android or iOS.
After upgrading to Windows 10, I discovered Air Display doesn't work on Windows 10. While it detects and connects to my iPad and Android phone, the extended screen is blank.
I remembered I had previously bought iDisplay for Android, so I installed it the latest version from the Play Store (3.0.1 published in Aug 2013) and I tried installed with the latest verion of the host software (iDisplay Desktop 22.214.171.124 Windows 8 Beta) on Windows 10. When I started the Android app, the Windows host software detected it, but the display driver crashed and my monitor just flickered while the app said "Connecting...".
DuetDisplay looks like a potential solution for iOS, but I don't want to buy it to find it doesn't work on Windows 10 either, and even then I'd rather find a solution that works on both iOS and Android.
It says on the spacedesk download page that they plan to release an app for Android and iOS in Q4 2015, but I wondered if anyone has experience of a working solution in the meantime?