Deterministic AI parsing
GPT-4o reads complex part numbers (RF650, Pagid RSL29, 300V) and extracts every fluid and component with zero manual entry.
One continuous take, no slides
The real app: a GPS trace imported, a workshop invoice read by the AI, and the brake-fluid gauge going critical — then back to zero.
The film was shot on a car. Everything in it works exactly the same on a motorcycle — same steps, same screens — with a parts catalogue and service life of its own. See the motorcycle page
Try the garage without creating an account
Five demo machines, cars and motorcycles. Add a track session and watch the gauges react.
🏁 Mas du Clos — 18 laps17,647 mi12.6 h
Brake fluid (high temperature)Motul RBF 660
100 %Replacement required
Brake padsEndless ME20
81 %≈ 9,952 mi or 2.3 h of track left
TyresNankang AR-1
72 %≈ 5,090 mi or 2.5 h of track left
These percentages come from StemmaPass's real wear engine, not an animation — they are the numbers you'll see on your own vehicle.
Try AI invoice extraction
Drop in a workshop invoice (PDF or JPEG/PNG image). The AI instantly extracts wear parts, brands and part numbers.
The document is not kept: the demo reads it and forgets it, nothing is archived — you don't even have an account. To read it, the image is sent to OpenAI. And with an account?
Predictive track wear
Custom wear multipliers (x5 to x8) per track session, so you can anticipate brake fluid boiling point and pad replacement.
PDF White Book
When you sell, the full dossier: history, wear, sessions and the amount invested, invoice by invoice. To print and hand over with the vehicle.
Readable without signal
At the back of a workshop or in a paddock with no signal, your garage, wear levels, recent sessions and the passport QR code stay readable, for every logbook already opened on the device. Adding a session or an invoice needs a connection.
Resale ready
One public link beats a folder full of invoices
When you sell, your listing carries a link to a full traceability passport: service history, consumable wear status and GPS-verified track sessions. Buyers read everything without creating an account.
- 🔗 A link you can paste into any listing
- 🔒 Name, email, VIN and amounts never exposed
- 🌍 Shown in the buyer's own language and units
Designed to be linked from listings on car auction and classifieds platforms (Bring a Trailer, Cars & Bids, Collecting Cars…). StemmaPass is not affiliated with any of them.
Traceability passportPorsche 911 GT3992 · 2024 · 30,137 mi
Traceability- 14
- Services
- 7
- Track sessions
- 23
- Parts tracked
Compiled from records uploaded by the owner. StemmaPass does not verify their authenticity.
Simple, transparent pricing
Pick the plan that matches your garage and your track days.
Starter
One vehicle, alerted once a threshold is already crossed
US$0.00
- ✅ 3 free AI extractions, full parsing
- ✅ Unlimited manual entry
- ✅ Complete servicing schedule
- ✅ Public resale passport
- — GPS file import: Track plan
Road
Warned before the failure, not after
US$5.99 / month
- ✅ Everything in Starter
- ✅ Alerts from 61 % wear, no monthly cap
- ✅ Unlimited invoices and AI extractions
- ✅ Up to 25 vehicles
- — GPS file import: Track plan
Popular
Track
What to fix before Saturday
US$9.99 / month
- ✅ Everything in Road
- 🌡️ Wear read on your track hours
- 📅 Warned a month before each outing, then at seven days
- 🏁 GPS import from LapTimer, TrackAddict & RaceChrono
Logging your track sessions by hand is free on every plan; importing them from a GPS lap timer is reserved for the Track plan. Each plan in detail
PDF White Book
One payment, per vehicle, for life
US$39.00
- ✅ Every invoice amount and the total invested
- ✅ A document to print, archive and hand over with the vehicle
- ✅ Regenerate it any time: every new service is added, no second payment
Prices carry no VAT — French small-business exemption, art. 293 B CGI. Any local currency is converted by Stripe at payment.