The Xperia Z1 has only been available to purchase for just over a week now, and Sony is already pushing out an over-the-air (OTA) update to the HSPA+ version of the Japanese company’s flagship smartphone for customers based in India.

BlackBerry attempted to roll out its much-anticipated BBM app for both Android and iOS on Saturday, and whilst the iPhone app made its way to New Zealand, Australia, Malaysia, India and the UAE, Android’s version failed to even get uploaded to the Play Store servers.

It’s Sunday, the time of the week when Cult of Android brings you its report on some of the very best apps we have been using throughout the past week.

This week we have been trying out a very impressive calendar application, a gorgeous live wallpaper, a simple, yet futuristic calendar widget, and last but not least, an extremely useful exclusive app for Samsung customers.

BBM for Android and iOS is now officially available to download from the App Store and Google Play. It’s the first time in its history that the popular messaging service has been brought to a third-party platform — but with services like WhatsApp and Viber already dominating cross-platform chat, is it too late?

The Samsung Developers Conference (SDC) sent an email out Friday to tell interested registrants that there has been “intense interest” in the conference, and that they are running out of tickets for the event. Cult of Android will be there in the flesh, so stay tuned for more details during the event.

The conference is set to have Mozilla evangelist Christian Heilman, head of Samsung Media Solutions America, Curtis Sasaki, and the head of the Open Innovation Center, David Eun, among other celebrated speakers.

The email also mentions a healthy dose of swag for attendees, so if you’re an Android or other Samsung developer looking for a good conference, and you like getting free stuff, this may be the one for you.