Teslameter

How Teslameter works

Teslameter records your Tesla's drives, charging sessions and parked time, then turns them into statistics: efficiency, charging costs, battery health, vampire drain, where and when you drive. Setup takes about five minutes, once.

Getting started

  1. 1

    Open your invite link

    Teslameter is invite-only. Open the link you were sent; it works once and is tied to you.

  2. 2

    Sign in with Tesla

    You'll go to Tesla's own login page. Tesla will ask you to approve Teramips EV Meter. That's Teslameter's registered name with Tesla. It asks for profile, vehicle informationand vehicle location, all read-only. Teslameter never sees your Tesla password.

  3. 3

    Add the Teslameter key to your car (at the car, once)

    Sit in your car with your phone (the one with the Tesla app) and open tesla.com/_ak/teslameter.teramips.com. The Tesla app opens. Approve the key. The car may ask you to tap your key card to confirm.

    Why: Tesla cars only accept settings from apps whose key they trust. This key lets Teslameter tell your car where to send its data. It appears under Controls → Locks and you can remove it there anytime.

  4. 4

    Press “Start streaming”

    In Settings, your car is listed. Press Start streaming; you can do this from anywhere. Within a few minutes the car picks up the setting, and data appears after its next drive or charge. The status badge turns green (“Streaming”) once Tesla confirms it.

  5. 5

    Optional: tune it

    In Settings, set your electricity and fuel prices so cost and savings figures are accurate, and “Set home” while the car is parked at home. On the Overview page, click any place name to rename it (“Home”, “Office”, “Gym”).

What you'll see

  • Overview: distance, efficiency (Wh/km), charging cost, savings vs. a gasoline car, vampire drain, sleep score, FSD share, charts and personal records. Switch between 30 days, 90 days, 1 year or all time.
  • Drives: every trip with route map, speed and battery graphs.
  • Charges: every session (home, Supercharger, public), energy, peak power, charging curve and cost. You can override a cost with what you actually paid.
  • Battery: estimated capacity over time, projected range at 100%, and how much battery the car loses while parked.

Questions

›Will this drain my battery or wake my car?

No. Teslameter never wakes the car and never polls it. The car streams data only while it's already awake (driving, charging, or in use), and sends nothing while asleep. You also won't get the “third-party app” icon popping up every minute like with older polling apps.

›Can Teslameter unlock, start or control my car?

No. Teslameter only has Tesla's read-only permissions (vehicle information and location), and the app contains no code that sends commands.

›Who can see my data?

Only you, plus anyone you explicitly share your car with (Settings → “Shared with”). Sharing is read-only and you can remove it anytime. The server operator can technically access the database; ask them if that matters to you.

›Does it cost me anything?

No. Tesla bills the app operator (not you) a tiny amount per data point, covered by Tesla's free monthly allowance.

›Nothing shows up after I pressed Start streaming

Check the badge in Settings:

  • Virtual key not added: do step 3 at the car, then press the button again.
  • Configured, waiting to sync: normal for a few minutes. The car needs to be awake (open the Tesla app or go for a drive).
  • Not supported: older Model S/X (pre-2021) and very old firmware can't stream.

Statistics appear after the first complete drive or charging session.

›How accurate are the numbers?

Distances, battery levels, energy and charging power come straight from the car. Costs are estimates from the prices in Settings unless you enter the real amount. Efficiency includes everything the battery spends while driving (climate control too), so it's usually a bit higher than the trip meter shows.

›How do I stop using Teslameter?

Remove the key in the car (Controls → Locks, delete the Teramips EV Meter key), and revoke Teramips EV Meter in your Tesla account's third-party app settings (tesla.com account page or the Tesla app). That stops the data stream. To also erase everything recorded, use Settings → Delete my account— it deletes your account and all your cars' history at once. See the privacy policy.