ai_chat
AI chat about your car
Ask in plain language: “when did I change the timing belt?” — get an answer linked to the receipt.
Used-car check
Buying a used car? Find out what the previous owner hid.
9.5% of cars in Ukraine run on a rolled-back odometer — the second highest in Europe
Drop in the VIN and any receipts — in 5 minutes you get a verified history, odometer-fraud detection and hidden repairs. $5 against a $500 average overpay for someone else’s crash.
Verifiable vehicle memory
Your car’s whole story in one place. Verified. Impossible to fake.
5 min from uploading receipts to a finished, cryptographically signed report
Receipts, repairs, diagnostics and mileage live in one memory. Ask in plain language and share a proven history when you sell.
No sign-up for the demo · Your data stays yours · Open verifier
Demo, no sign-up
See a finished report before you type anything
A real example of a verified vehicle history: service timeline, risk score and a cryptographic signature you can verify right here in the browser. No account, no email.
Open the example reportreport.jsonInteractive
How it works
Three steps turn a pile of receipts into a verified history
- 01 captureСТО «АВТОПРОФІ»182 500 km · 18 400 ₴
Drop in receipts or a VIN
Snap receipts, upload a PDF or enter a VIN. OCR and AI figure out the work and the parts for you.
- 02 structuredate 2024-11mileage 182 500 kmpart ГРМ + помпаcost 18 400 ₴ ?
AI structures the history
Every record lands on a timeline: date, mileage, parts, cost. Suspicious data is flagged for review.
- 03 verifyrisk_score lowsignature Ed25519 ✓поділитися посиланням →
Get a verified report
A finished report with a risk score and a cryptographic signature. Share the link — the buyer verifies it without trusting us.
Before you buy
Risk score, odometer-fraud detector and chronic faults — for $5
Odometer rollback can raise a car’s price by up to 25%. GearCortex cross-checks every odometer reading along the timeline, catches rollbacks and surfaces the model’s chronic faults. One check costs roughly 100× less than the average overpay.
9.46% of cars in Ukraine have a rolled-back odometer — by 92,393 km on average
carVertical, 2025
- Odometer-rollback detection across the whole timeline
- Chronic faults specific to your model and generation
- Hidden crash repairs from receipts and diagnostics
risk_score: low
Low risk · Medium risk · High risk · Critical risk
- 2022-06142 000 km
- 2023-03168 400 km
- 2023-10182 500 km
- 2024-05176 300 km ↓
mileage rollback detected
After you buy
Bought it? Keep the history going — and sell for more
The check is just the start. Keep building the car’s memory: every receipt, every service adds resale value. And GearCortex tells you which part is about to fail and where to get it cheaply.
- The car’s memory grows with every service
- Forecast maintenance and wear ahead of time
- A verified history means a higher resale price
History raises the resale price
With a kept history Without history
Maintenance forecast ahead
- Brake pads ~ in 8,000 km
- Oil ~ in 4 months
- Coolant ~ in 14 months
Verified Ledger
A digital notary for your car’s history
Every record is signed with an Ed25519 key and chained into a hash chain. Anyone — buyer, dealer, insurer — can verify the history was never altered, right in the browser, without trusting our servers.
Verify this report yourself
Hit “Verify” and the browser checks the cryptographic signature. Then try tampering with a record and watch the check fail instantly.
Record hash chain
block #1
abaebc…e848
prev 0a9ba9…d39a
block #2
72da70…a883
prev abaebc…e848
- Records in the chain
- 2
- Public key
- 3d051d4f3ee21c1f6357a8a0
Features
A memory that works for you every day
ocr
Receipt and document OCR
Photo of a receipt → structured fields. Suspicious numbers are flagged for review.
recognized
obd2
OBD2 diagnostics
Connect an adapter — error codes and readings flow straight into the history.
P0420
cat. efficiency
2,100 RPM
forecast
Maintenance forecast
GearCortex tracks mileage and time to warn you about the next service in advance.
next service ~ in 4 months pads ~ in 8,000 km
overpay
Overpay detector
See where a workshop overcharged and what the work and the part actually cost.
+38% overcharge
fleet
Multiple vehicles
Any make, model and generation — a universal catalog, not a single chassis.
BMW Audi VW Toyota
voice
Voice input
Add records by voice: “filled 40 litres for 1,850 UAH” — instantly becomes a history event.
“filled 40 L · 1,850 ₴”
voice → event
Pricing
Start free. Pay only for value
Prices are detected automatically for your region. The pre-purchase check is a one-time payment, no subscription.
Loading prices for your region…
Why you can trust us
Trust is built on transparency, not reviews
Founder story
I bought a Mercedes CLS and got a box of receipts and service records from the previous owner spanning 6 years of ownership. I built the app to finally make sense of the car’s history. Now it’s yours.
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Privacy by default
Offline-first, local storage. We do not sell or rent your data.
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Open verifier
The crypto check runs in your browser. You can verify any report without us.
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Honest numbers
Every statistic on this site has a primary source. No invented “thousands of customers”.
FAQ
Frequently asked questions
Is this just another app I’ll abandon?
No. Drop in your receipts once and get a structured history and AI chat forever. Try the demo with no sign-up to see for yourself.
What about my data?
Offline-first and local storage. Your data stays yours and we do not sell it. Every record is cryptographically signed.
Why pay when free VIN checks exist?
GearCortex does more than show a VIN — it builds a verified memory: rollback detection, chronic faults, maintenance forecast. One $5 check pays for itself on the first hidden problem.
How does a buyer verify the history wasn’t faked?
Every report carries an Ed25519 signature. The buyer opens the link and verifies the signature right in the browser — without trusting our servers.
Which cars are supported?
Any make, model and generation thanks to a universal vehicle catalog. Not tied to a single chassis.
Ready to start?
Check a car in 5 minutes — before someone else’s past becomes your problem
Start with the free demo or run a full check for $5. No sign-up to take a look.