With the release of lowest prices for professional cialis iOS 7, Apple introduced a really useful feature, with an accompanying API, for developers. Background Transfer allows downloading/uploading of data, with a working canceling/resuming mechanism. And all this, without the cialis prices app having to be active, or even after the app is terminated. This is great news, since when multitasking was first introduced with iOS 4, the only available option was to allow the app to execute code in the background for around 600 seconds. This, kamagra supplier viagra of course, was OK for simple data transfers, like when we wanted to complete a download of small amount of data and the user moved away from our app, but what about when 10 minutes were not enough?