The best solutions are simple solutions. Roost has developed a unique connected platform that delivers the ultimate in installation simplicity and the most affordable way for consumers to enter the smart home space. The Roost Smart Battery turns existing smoke alarms into connected smart devices, by retrofitting them with a connected 9 V battery. Download the Roost app, connect to your home WiFi and change a 9 V battery, to immediately receive emergency alerts on your mobile device. More than 350 million homes have smoke alarms in the US and over 20% of those have non-working smoke alarms due to missing or dead batteries. Roost solves this.