Wunderlist, the hugely popular cross-platform productivity app that now boasts over 5.3 million users worldwide, got a new feature called Comments this week, which brings the conversation to your to-do list. If you use Wunderlist in a professional environment, you can now discuss tasks and projects with your team within individual to-dos.

What’s more, you can now try Comments — as well as Files and Assigning — for free for a limited time, without signing up to Wunderlist Pro.

Apple’s iMessage service is pretty terrific, but it has one big limitation, and that is that it’s only available on Macs and iOS devices. At least officially. But there is an unofficial app that brings iMessage to your Android-powered smartphone. It works just as advertised, but we strongly advise you not to use it.

BBM’s cross-platform launch failed miserably this weekend. The app made its way to the iPhone in a small few countries, but the rollout was halted before it could reach the United States — or Google Play.

BlackBerry’s excuse for the catastrophic failure was that a leaked BBM APK for Android was causing some server troubles, and now the Canadian company has told fans that it will “take some time” to fix the problem, and that we should not expect to see the app this week.

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?

At the Tokyo Games Show today, Sony unveiled its new PlayStation App for Android and iOS, which lets gamers access the PlayStation Network from their smartphone and tablet to interact with friends, see what others are playing, and remotely download games to your console.

The app will also turn your Android or iOS device into a second screen for selected PlayStation 4 titles.