iPhone · in private testing
Tell Nine Tenths you have two hours. It finds the best roads near you, loops you back to where you started, and calls every corner on the way.
Every road is scored from OpenStreetMap geometry and elevation: corner radius, how the corners flow into one another, and how often something interrupts the run.
So a drive is not described as “scenic”. It is described as 69% good road, a 27 mile unbroken stretch, 2,757 feet of climbing, and the steepest bit 27 miles in — before you decide whether to go.
Unpaved roads are excluded deliberately. This is built for cars that do not belong on gravel.
Not illustrations. Every line below is the real shape of a real road, at a common scale so the lengths compare, taken from the same data the app serves and ranked by the same scoring.
“Very sharp left then medium right then very sharp right.”
Nine Tenths reads the corners ahead out loud, worked out from the road’s own geometry rather than from a list of turns. You hear what the next few hundred metres are shaped like while you are still looking at them.
No other navigation app does this, which is the whole reason this one exists.
A rally is a day out through the stops you choose, with arrival times worked out for each one. Share a six-character code and everyone sees everyone on the map. Any drive can become one — a generated loop, a route somewhere, or something you saved from last time.
Download a drive before you leave and the route, the map and the pace notes all keep working with no signal at all — which is the state most good roads are in.
It does not record, rank or display how fast anyone drove, and it never will.
Nine Tenths is in private testing on iPhone. If you want to drive it early, say so — invites go out by TestFlight.
or write to support@ninetenths.app