This is better than Instapaper.
For related reasons, it appears that the Readability app has only been released on iOS at the moment. I have no idea why on earth you would do this, but whatever. As long as they eventually release an Android app, the problem will be solved.
There is also not a good profit motive for him. Android users, on average, not only use fewer apps, but especially buy fewer apps - very few paid apps on Android are as successful as iOS counterparts.
As for Readability, I use the excellent mobile web app. I will check out the iOS app, I suppose, but for Android phones the web app should be fine.
However, if you think Marco himself isn't full of anti-Android bias and contempt, you haven't been paying attention. Check out his Twitter feed. Or his blog. Aaron Pressman at The Orange View has captured more than a few examples (as have others, I'm sure).
Marco likes to talk about how he hasn't seen a good Instapaper Android app and how that "proves" there's no market for him on Android (conveniently dismissing the official ReadItLater app, not to mention the pile of apps using the ReadItLater API that preceded it).
Personally, I think there's a much simpler explanation: Any developer working on an Instapaper Android app couldn't help coming across Marco's opinions on Android. At that point, I'd expect most good Android developers would decide that they had better things to do than to writing an app for a platform their API provider hates.
Really?