Canadian insurer Desjardins entered a partnership with smart-home device company Roost in which home insurance policyholders can get a Roost device to detect leaks and freezes in their home. But along with that initiative comes enhancements to the company's mobile app. Desjardins is linking the data feed from the Roost product with its policy-servicing capabilities, as well as its usage-based insurance program, Ajusto, through its app, The Personal.