With 18 million users running more than a billion applets a month, IFTTT wants to become a service that connects pretty much everything — though some users say it still has room for improvement.

If you aren’t familiar with IFTTT — short for “If This Then That” — it can be a little tough to wrap your head around. The basic gist of the platform is this: It cleverly links together hardware, ...

IFTTT, the web service frequently used to link disparate smart-home devices and services (the acronym stands for If This Then That), has opened its platform to allow third-party partners to integrate ...