Two different kinds of apps are available. One is for Android phones, and the other is for Apple products. Here are the links for them, in case you would like to find out more about Instapray, read the reviews, and/or visit their website and download the apps:
Android: https://play.google.com/store/apps/deta ... pray&hl=en
Apple: https://itunes.apple.com/us/app/instapr ... 97801?mt=8
If you've ever used Instapray, I'd like to hear what you think of it.