Ever wish you could disarm your alarm system while sitting in your driveway? Or check in on, say, the cat while you're out of town? Alarm.com's new iPhone app lets you do all that and more. It's a freebie for Alarm.com customers. Designed for homes and businesses alike, Alarm.com's systems (which are sold and installed by various third-party dealers) rely on wireless sensors and GSM/GPRS networks. In other words, they're highly connected.