Usually, it is very interesting to compare the 'same' software applications and apps between various platforms, and the Pluralsight offline players are an outstanding example to have a closer look at. The original Silverlight desktop offline player, the iOS app of Pluralsight and the new HTML5 online player all have variable playback speed. Just the Android app doesn't. But not for long. A couple of days Pluralsight finally announced that their development department found a reliable solution to provide flexible speeds.
For the brave ones among us, please have a look at the public beta they are offering on their blog article.
Please be aware of, that using any Pluralsight offline player requires to have a Plus subscription. Otherwise, you cannot use the application after all.