However they acted differently for the wakelock api. In Android, there is a private api that allowed access to a list of wakelocks, which was used by many apps

However they acted differently for the wakelock api. In Android, there is a private api that allowed access to a list of wakelocks, which was used by many apps to provide the user with more information about what is keeping the system awake. However, their was a security implication (this was a real concern), so 4.4 made the api both private and inaccessible. (Private apis by default you can't use, but you can get around it by getting a reference using language-features). Unlike the sms situation though, they didn't provide a replacement api without the security issue. So now you need to root the phone in order to access the list of wakelocks. While this may not affect most of the users of these apps, this is quite unfortunate, because these applications were especially handy on non-stock phones, which usually aren't easily rootable.