Open Whisper Systems has released version 2 of its Signal secure calling app for iPhone. This is an important iteration, as it introduces secure text messaging that’s compatible with the outfit’s TextSecure app for Android — for now, Open Whisper Systems’ secure voice app for Android, RedPhone, remains separate from that, though everything will come together later this year in a Signal app that works across iOS, Android and the desktop. As secure communications operations go, Open Whisper Systems has good credibility, offering end-to-end crypto, auditable open-source code and decent identity verification. The TextSecure protocol has also found its way into WhatsApp, which is why Android-toting users of that Facebook-owned messaging app enjoy extra security these days.
Last year, SanDisk released 128GB memory cards for phones and tablets; this year, it’s following up with a 200GB card. Called the Ultra microSDXC UHS-I, Premium Edition , the tiny card can store 20 hours of full HD video and transfer up to 1,200 photos in one minute thanks to the 90MBps transfer speeds. Before you get too excited for this little wonder, it comes with a big price tag: Expect to see the 200GB memory card in the next quarter with a suggested retail price of $399.99. Hopefully, the street price comes down quickly since this phone or tablet accessory can cost more than a mobile device.