It’s common knowledge that Android devices tend to be more out of date than iOS devices, but Recurse Center’s Dan Luu has published some data that reveals just how old devices in the wild are. In May 2017, Google announced that there are over two billion active Android devices: based on the latest stats, nearly half of these devices are two years out of date. We’ve seen that Android devices appear to be getting more out of date over time. This makes it difficult for developers to target “new” Android API features, where new means anything introduced in the past few years. It also means that there are a lot of Android devices out there that are behind in terms of security. This is true both in absolute terms and also relative to iOS.