You finally decide your phone in a tank-bag pocket is not a navigation system, and within an hour of shopping you have eight tabs open: a 5-inch screen, a 7-inch screen, two that have cameras built in, one with radar, and a price spread from $140 to $400.

You are parked at a scenic overlook waiting out a rain cell, and the CarPlay screen mounted to your bars is right there at eye level.

A driver merges into your lane without looking, you grab the brakes, and the moment is over in two seconds. Back home you wish you had it on video — and then realize the slick CarPlay box on your bars only ever showed you Maps; it never recorded a frame.

You are stopped at a light in a downpour, gloves on, trying to skip to the next song. The screen on your handlebars reads every drop rolling across the glass as a fingertip and starts scrolling on its own. The same touchscreen in a car would never do this, because it never gets wet.

You finish mounting a wireless CarPlay screen on the bars, fire up the bike, and the map snaps on perfectly — but the turn-by-turn voice is dead silent in your helmet, even though the navigation is clearly running.

You found a portable CarPlay screen that suction-cups to a windshield, costs less than a dedicated motorcycle unit, and shows maps, music, and even a dash-cam feed.

A friend pulls his new Model Y into the lot, plugs in his iPhone out of habit, and waits for that familiar CarPlay launcher to slide onto the screen. It never shows up.

You park the Audi in the garage, tap the MMI screen, and Google Maps is already on the dash with the route to the trailhead. Then you swing a leg over the bike for the actual ride, glance down at the bars, and there is nothing there but a tachometer.

You search "best wireless Android Auto adapter," picture a tidy little dongle on your bars, and assume it will finally put Maps on a screen in front of you.

You found a $15 Bluetooth dongle that turned your old car radio into a hands-free phone in about thirty seconds, and now you are eyeing your bike, wondering if the same trick gets you music and turn-by-turn on the next ride.