Every second on the road, every charging session, the moment it happens. Watch the battery tick up while you charge. Watch the route extend as you drive. No refresh. No polling. The car talks, the page updates.
Most live trackers send your location, your speed, your routines, and your charging spots to a server that can read all of it. And we mean ALL of it. Look here, what you agreed to be potentially given away. We think this is a problem, so ours can’t. The key that unlocks your data is derived from your passphrase. We never store it. The moment you log out, everything we hold for you turns back into noise — even to us.
If our database is breached, an engineer goes rogue, or a subpoena lands on the desk: what we have is ciphertext. There is no other copy.
Read the full privacy page, with the limits stated out loudDrives, charging, battery health. Every sample your car emits is parsed into views that update the moment new data arrives. No nightly batch, no “refresh in 15 minutes,” no waiting. More to come.
The route extends across the map in real time. Distance, speed, energy, efficiency, temperature, all updating live. When the drive ends, the summary is already complete.
Plugged in at home, at a Supercharger, or anywhere else. See the battery percentage climb second by second, with peak speed, energy added, and cost based on the electricity rate you give us.
Rated range at 100%, plotted by month, on the car you actually own. Hours spent at very high and very low charge — the two things that age a Tesla battery. Lifetime energy through the pack.
We never ask for your Tesla password. We never ask for your data after onboarding. Once your car is paired, it streams to your private space and you read it back the moment you log in.
Email plus a passphrase you choose. Your passphrase becomes the key to your data. We discard it the moment signup completes — we never write it down anywhere.
One round-trip through Tesla’s official sign-in and virtual key flow — the same one the Tesla app uses. We get permission to receive your data, never your password. Revoke any time from your Tesla account.
Tesla pushes telemetry to us roughly once a second while you drive or charge. We seal each batch to your key the moment it arrives. From then on it’s ciphertext to everyone, including us.
The dashboard opens and your data unlocks in memory for the length of your session. New samples appear in real time. Close the tab and everything we hold returns to ciphertext.
BlackCurrent is a web app you can pin to your home screen. Same icon, same standalone window, on every device you already own, including the one parked in your driveway.
A bug fix lands the moment we deploy. No two-week review queue. The version in your browser tomorrow morning is the version we wrote tonight.
A compiled app can claim anything. A web app shows you exactly what runs in your browser. Read the source. Watch the network panel. No app-store-signed black box.
Your iPhone, your Android, your laptop, your work machine. Same login, same data, same live view. Open a new device, type the URL, sign in.
Works on the rear passenger screen too on the cars that have one. Whole-family g-meter. The kids will cheer at every on-ramp. Probably.
Don’t want to install? It also just works as a regular page in any modern browser. The PWA layer is a convenience, not a requirement.
BlackCurrent isn’t the only good answer for every owner. If you don’t care about live data, or if private-key encryption doesn’t matter to you, the alternatives are mature and worth your time. Here is the actual lineup.
| Capability | BlackCurrent | Tessie | TeslaFi | TeslaMate |
|---|---|---|---|---|
| Live updates while you drive (sub-second) | Yes | Polled, minutes apart | Polled, minutes apart | Polled, minutes apart |
| Full one-per-second telemetry resolution | Yes | No | No | No |
| Data encrypted with your key | Yes | No | No | Self-hosted |
| Readable by the provider when you’re logged out | No | Yes | Yes | N/A |
| Hosted (no server, no Raspberry Pi) | Yes | Yes | Yes | No |
| One subpoena returns your plaintext | No | Yes | Yes | Maybe |
| Price | $7.99 / mo unlimited cars | $12.99 / mo per car · Pro | $7.99 / mo per car | Free self-host |
Capabilities and prices drawn from each product’s public pricing page, May 2026. Tessie and TeslaFi both bill per vehicle (Tessie shown at its full-resolution Pro tier), so a three-Tesla garage runs $38.97 / mo on Tessie or $23.97 / mo on TeslaFi — versus one flat $7.99 here. We’ll update if any of them changes its model; if we have something wrong, email hello@blackcurrent.app and we’ll fix it.
No tiers, no “Pro” upsell, no free tier paid for by selling your location history. You pay us — we owe you the product. Both sides honest about what they want.
For one Tesla account, unlimited vehicles linked. Cancel from the app, no email chase, no “we’re sorry to see you go” survey.
The questions we actually receive, answered the same way the privacy page is written — plainly, with the limits stated.
Most Tesla apps pull data on a schedule — every five minutes, every fifteen minutes. They get a snapshot, not a stream. If you open the app during a drive, you see the last snapshot, not what the car is doing right now.
Tesla offers a separate live-streaming channel for partners. We use that. Telemetry pushes to us roughly once a second; we hand it to your open browser tab over a long-lived connection. The moment new data lands, the page updates. No refresh, no spinner.
Your data is unrecoverable. By us, by you, by anyone. This is the other side of the same design that prevents us from reading it. We will not have a “reset password” button that decrypts your data; no such button can exist.
Pick a passphrase you can remember and store it in a password manager. If you lose it, what we hold is just noise; the only path forward is creating a new account.
In the European Union. The servers are inside the EU’s data protection jurisdiction, and your encrypted data never leaves it. We use a major cloud provider for the underlying hardware; the keys that matter are yours, not theirs and not ours.
No. We are an independent third-party application that uses Tesla’s official partner channel. “Tesla” is a trademark of Tesla, Inc.; this product is not endorsed by Tesla.
Your passphrase produces a private key. That key encrypts every batch of telemetry your car sends us. We hold only the encrypted blobs and a passphrase-locked copy of your key.
While you’re logged in, we unlock the key in memory so we can render your pages. The moment you log out, the unlocked copy is gone. The honest limit: while a session is open, an attacker with deep access to our servers could in principle read memory. If that specific threat is your dealbreaker, a self-hosted alternative is a better fit. Or drop us a line... But psst...
Model 3, Y, S, X, and Cybertruck from 2021 onward — the models with the newer hardware that supports Tesla’s partner channel.
Yes. Export rebuilds a full copy of your data inside your live session and hands it to your browser as a file. Your browser receives plain readable data; our servers never persist it. You own your data, you take it with you.
From the app: Settings, then Cancel subscription. What we hold for you is deleted; the Tesla permission is revoked. No retention — if you re-sign-up later, you start clean unless you export your data and the import it.
Beta access is rolling. Email us and we’ll send a signup link the same day.