You'd be forgiven if you don't remember what Google Smart Lock, aka Smart Lock for Passwords, is. The functionality, which aims to bridge your Google-saved website and service logins on Chrome with those in your Android apps, showed up almost three years ago in the Android M Dev Preview then started rolling to pre-Marshmallow devices. Codenamed YOLO for You Only Login Once, it is the precursor to the Autofill API we saw in Oreo and a solution to all those services that don't use a Google/Facebook/Twitter account login.
Right now, I can count the apps that I know of that support Smart Lock on exactly two hands: Netflix and Netflix for Android TV, WordPress, Flipboard, Waze, Nest, NYTimes, Fitbit, Nokia Health Mate, and most recently NBC.
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