You can screencast to nearly any device, including other Android phones or tablets, as long as you have a newish phone. It worked well on my Samsung Galaxy S6 Edge, letting me watch videos with nearly no lag, as the photo above shows. In addition, I was able to capture a GIF and video of actions on the phone, which could be handy for creating tutorials. The only drawback for that is the prominent watermark, because there's apparently no way to get rid of it. The app is now available on Google Play.