Drivers and riders who plan their route on purpose

A sat nav that never auto-reroutes

You chose that road for a reason. Tarmac will never swap it for a faster one without asking.

The problem

Mainstream navigation apps reroute the moment they think they've found a quicker way — dumping you onto a dual carriageway when you planned a mountain pass.

Tarmac app — A sat nav that never auto-reroutes

How Tarmac helps

How it works

  1. Step 1

    The plan is canonical

    Your saved route is the route. Deviations never overwrite it.

  2. Step 2

    Suggestions, not decisions

    When traffic is heavy, Tarmac suggests a diversion and shows the time saving. You tap to accept or ignore it.

  3. Step 3

    Diversions rejoin the plan

    Accepted diversions are temporary overlays that bring you back onto your planned route.

FAQ

Questions people ask

What if I take a wrong turn?+

Tarmac guides you back to your planned route rather than inventing a new one.

Can I turn traffic suggestions off?+

Suggestions are just prompts; you can ignore them and carry on.

Does the group see my diversion?+

Each rider confirms their own diversion unless the group is set to organiser-only changes.

Explore more features

Plan it once · ride it together

Take this road with your group.