Also: My 4 favorite Android Auto settings are seriously useful - but hidden by default

This is probably the Android Auto app I use most often. Fuelio shows you all nearby gas stations and current prices. That capability alone is worth using the app, because you can find the closest spot in an emergency or save a little money here and there by heading to a different station down the road. There's rarely a huge difference from one station to the next, but I can usually save about 10 cents a gallon by taking a quick look, and those savings add up.

Fuelio also lets you log your mileage and cost so you can see how well your car is operating and how much you're paying, and log any service and repair costs so you have that information easily at hand if you ever need it. This feature has come in handy several times when my oil change sticker fell off, and I needed a quick reference for when I last had the oil changed.

I tend to listen to podcasts more than music while I'm driving, and I always have multiple episodes of several podcasts on deck. I've tried a few podcast apps, but Pocket Casts is the best.