CURVE WARNINGS
An app that warns you about sharp curves.
Kurvo grades every bend on the road from its measured geometry and warns you before you reach it: on screen, and spoken through your headset.
Why sharp curves surprise riders
A navigation app tells you where to turn. It says nothing about the bend between the turns: whether the next curve is a gentle sweeper you can carry speed through, or a tightening hairpin that wanted you off the throttle five seconds ago. On a motorcycle that is the information that matters, because you commit to a line before the corner, not in it.
Road signs help, but they are inconsistent between countries and often missing exactly where you need them: on the quiet back roads you ride for fun.
How Kurvo grades a curve
Kurvo analyzes the measured geometry of the road network, over 54 million road segments and counting, and grades every bend by how tight it really is: from grade 6, a fast sweeper, down to grade 1 and full hairpins. The grade comes from the shape of the asphalt itself, not from user reports, so a blind crest on a road nobody reviewed still gets called correctly.
You can read more about the grading system in Why Curvature Matters for Motorcycle Riders.
The warning itself
Before each meaningful curve, Kurvo shows a curve card: direction, severity and distance, like R3 in 200 m. The card grows as the curve gets close, so the most important number is always the biggest thing on screen. Through your headset, the same call is spoken ahead of time, fused with the turn instructions so the two never talk over each other. Your music ducks for the call, then comes back.
This is the same system rally co-drivers use, adapted for public roads. We built a whole page about it: rally pace notes for motorcycles.
No route required
You do not need to plan anything to get curve warnings. Freeride mode reads the road you are already on and calls the curves as they come, with no destination set. Ride out, pick roads on instinct, and let the app read what is ahead.
On a motorcycle or in a car
Kurvo is built for motorcycle riders first, but the curve warnings work for any vehicle that enjoys a curvy road. CarPlay and Android Auto are supported, free, so the curve card can sit on the dashboard instead of the handlebars.
The honest limits
Kurvo currently routes in 14 European countries (Denmark, Germany, Austria, Switzerland, the Netherlands, Belgium, Italy, Spain, Portugal, Czechia, Slovenia, Norway, Sweden and Greece), with more being added, and it needs an internet connection. If you ride outside that map, the curve warnings cannot help you yet. Everything described on this page is free; see the full feature list for what Kurvo+ adds.
Frequently asked questions
How does Kurvo know how sharp a curve is? Kurvo analyzes the measured geometry of the road network and grades every bend from gentle sweeper to full hairpin. The grade comes from the shape of the road itself, not from user reports.
Are the curve warnings free? Yes. Curve warnings, turn-by-turn navigation, and voice guidance are all part of the free tier of Kurvo on iOS and Android.
Do I need to plan a route to get curve warnings? No. Freeride mode reads the road you are already on and calls the curves as they come, with no destination set.
Does it work in a car? Yes. Kurvo works for any vehicle, and CarPlay and Android Auto are supported for free.
Which countries are covered? Kurvo currently routes in 14 European countries, including Denmark, Germany, Austria, Switzerland, Italy, Spain and Norway, with more being added. An internet connection is required.
KURVO
Hear the next corner before you see it.
Kurvo is free on iOS and Android.