We haven't seen Google do much with Nest since buying the company for $3.2 billion back in January. Nest makes a connected thermostat and smoke detector, and it's a good bet that Google is rolling the company into its smart home division. Today we finally see the first public Google/Nest crossover: the Nest Learning Thermostat is now available through the Google Play Store.

Nest has been selling the device directly for some time, but now the thermostat is in Google's primary store next to smartphones, tablets, Chromebooks, and the Chromecast. The device is the same second-generation version that has been on sale since 2012, and it's still at the normal price of $249. Nest's other product, the Nest Protect, isn't yet up on the Play Store. Sales of the smart smoke detector have been halted due to problems with the "Nest Wave" alarm deactivation feature.

Nest is even running a promotion for Earth Day. For every Nest device sold today on Google Play, the company will plant a tree.