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Home / How it works

How is a Tesla driving score calculated?

Short answer: the car sends speed, pedals and forces once a second. We count clear events, turn them into rates per 100 km, and weight six rates into a 0–100 index. Location is never part of it.

Driving Index

One brake, one rate, one index.

The index comes from your own rates, is explained factor by factor, and you see it first. We compare you with no one unless you ask to. SAMPLE

EVENT

A hard brake in traffic

18:42 · hard brake54 km/h → 21 km/hpeak −0.42 g · 1.9 s

We also record the speed it happened at. A brake in stop-and-go traffic and one on the motorway are not the same thing.

RATE

Hard brakes per 100 km

3.1/100 km
bestworst
INDEX

0–100, from six factors

78/100
  • Hard braking
  • Fine-risk speed
  • Hard cornering
  • Night driving
  • Hard acceleration
  • Trip context

What we read

Seven signals. No location.

Your car sends these while you drive, and these are all we read. Location and route are not among them. Everything we read is listed here.

  • SpeedVehicleSpeedTime above 120 km/h, and the speed each brake happened at
  • Longitudinal accelerationLongitudinalAccelerationHard braking and hard acceleration
  • Lateral accelerationLateralAccelerationHard cornering
  • Brake pedalBrakePedalPosHow early and gently a brake starts
  • Accelerator pedalPedalPositionHow sudden pull-aways are
  • GearGearWhere a trip starts and ends
  • OdometerOdometerEvery rate per 100 km; the index after your first 50 km
  • Location and routeLocationNot read. Insurers never receive it either.OFF

Features

What you get

Each row says its status: available now, in pilot, or in development.

  • Car status

    A tyre that stays under the car's own recommended pressure, the service status, your charge limit: each finding with the reading it comes from and one thing to do.

    Available now

  • Battery and charging

    Your battery level over time and the charges we saw, said in a sentence. No battery advice until we know your battery type.

    Available now

  • Driving Index

    A 0–100 index from your own braking, cornering, speed and time of day, after your first 50 km. Your own rates first; compared with no one unless you ask to.

    In pilot

  • Trips

    Each trip with its hard brakes and the speed they happened at, and time above 120 km/h. Visible only to you.

    In pilot

  • A report for your insurer

    Share your index with an insurer you choose, for a set period, and revoke it any time.

    In development

  • Your car at a glance

    Battery, range, tyre pressures and software, straight from the car's own readings.

    Available now

Charging cost calculator

The difference

We read. We never remote-control.

  • No commands, ever

    Control apps ask for access to unlock, climate and charging. We only read. Nothing we do can open or move your car.

  • A score that is yours

    Tesla doesn't share its Safety Score with third parties. The Driving Index is our own, explained factor by factor, and you see it first.

  • Data insurers already use

    In the US, Tesla Insurance and Lemonade already use driving data in pricing. Your Driving Index is made so an insurer can read it: you decide if one ever does, and which one.

Privacy

Your data, your rules.

GDPR and KVKK · explicit consent · EU hostingPrivacy notice

  • Your location and routes stay with you. Insurers never receive them.

  • Nothing is shared without your explicit consent, per insurer, with a scope and an end date.

  • Withdraw consent any time: every read of your car stops.

  • Data is processed in the EU (Frankfurt). Tesla tokens are encrypted at rest.

Start

Start in three steps

  1. 01

    Open an account, connect your Tesla

    An email account in a minute, then read-only access through Tesla's own sign-in. We never see your Tesla password.

  2. 02

    Choose what you share

    Explicit consent for collecting data, and a separate one for any insurer.

  3. 03

    Pair the key

    Approve EVVisor in the Tesla app so the car can stream driving data for your index.

FAQ

Questions drivers ask

What is EVVisor?

EVVisor is a driving advisor for Tesla owners. It reads your car's own data through Tesla's official API, read-only, and turns it into plain sentences about your car and your driving: tyres, charging, braking and, after 50 km, your own Driving Index.

When do I see my Driving Index?

After your first 50 km of streamed driving. Until then the app shows what it already knows from your trips, such as your hard brakes and the speeds they happened at, and how many km are left.

Does it cost anything?

We don't charge during the pilot, and we don't ask for payment details.

Which Teslas work?

Any Tesla on your Tesla account. The Driving Index needs firmware 2024.26 or newer and the EVVisor key paired in the Tesla app.

Can EVVisor control my car?

No. We ask for read-only access. We can't unlock, start, climate-control or charge your car.

Where is my data?

In the EU, in Frankfurt. Tesla tokens are encrypted at rest, and insurers never receive your location.

I'm outside Turkey. Can I join?

The pilot runs in Turkey. Join the waitlist and we'll write when your country opens.

Is this a Tesla product?

No. EVVisor is independent and not affiliated with Tesla, Inc.

Make your nextdrive yourfirst reading.

We're opening car connections in small groups: join the waitlist and we'll write when it's your turn.

Join the waitlist

An insurer or a fleet?

One API connection gives you a driving-risk index, real km and data quality for every driver who consents.

EVVisor for insurers