One car. Several drivers. Every kilometre accounted for.
Kai runs the shared side of owning a car together: who drives when, what each trip cost, and what the car needs next. Every owner sees the same book.
- Odometer
- 148,250 km
- Fuel
- 52 / 64 L
- Next
- Tyre rotation · 29 Oct
A shared car, run on Kai.
Drive it. Hand it back. It's already in the book.
At every handover the driver logs the odometer, with a photo if the group wants one. Kai does the rest: the kilometres, the driver's share of the cost and the distance left to the next service.
- 01 Book
Reserve the car
Sat · 10:00–18:00 - 02 Pick up
Check fuel and odometer
148,164 km - 03 Drive
A day in the hills
86 km - 04 Hand back
Odometer, photo and checklist
148,250 km - 05 Bill
Charged to whoever drove
86 km × 0.40 €/km = 34.40 €
Bill per kilometre, per day or per hour: the group chooses.
Service by the kilometre and the calendar.
Intervals run on the odometer and on dates, so the oil service, the brakes and the roadworthiness test never depend on who remembered. When something is overdue, the car can be taken out of service until it is fixed.
Taking the car out of service blocks new bookings and tells every owner, with the reason and the dates.
Illustrative figures
Shares, not just members.
A share in a car is property. Kai keeps a proper share register next to the calendar and the accounts, so holdings drive booking rights and costs, and a change of owner is a recorded transfer rather than a spreadsheet edit.
- Share register
- Holdings, minimum holding and a full transfer history, exportable as a PDF register.
- Booking rights per share
- Quotas and summer-weekend limits per owner, counted as a running budget across the year.
- Costs by ownership
- Insurance, road tax and the garage split equally or by ownership percentage. Driving charged to whoever drove.
- Selling a share
- List a share on the Kai marketplace, collect interested buyers and complete the transfer once payment is confirmed.
| Owner | Shares | Km YTD | Balance |
|---|---|---|---|
| Jordan Rivera | 1 | 1,840 | −312 € |
| Casey Morgan | 1 | 2,310 | −486 € |
| Alex Thompson | 1 | 960 | 0 € |
| Sam Chen | 1 | 1,120 | +145 € |
Illustrative figures from the demo group
Four desks. One logbook.
Every drive booked fairly.
One calendar per car or for several. Booking rules handle quotas and the summer weekends everyone wants; a cancelled day goes to the next owner on the waitlist.
The car tells you what it needs.
Tyres, brakes and services scheduled against kilometres and dates, with the cost of each job attached to the car.
Who owes what, without the awkward message.
Kilometres, insurance, road tax and repairs split by the group's rules. Every owner sees their own balance and pays online or by bank transfer.
Every trip, in kilometres.
Each handover logs the distance and its cost. The total, and what is invoiced and paid, sit on the car's own page.
Log it before you hand over the keys.
Kai's apps for iPhone, iPad, Android and Mac are where owners book a day, log the odometer and fuel with a photo, and report anything that needs fixing. The next driver knows what they'll find.
- Book a day
- From the calendar
- Handover log
- Odometer · fuel · photo
- Report an issue
- Photo + note
iPhone · iPad · Android · Mac
The details owners ask about.
Odometer continuity
Each handover starts where the last one ended; a gap is flagged instead of quietly lost.
Handover checklists
Custom fields on every log: fuel level, cleanliness, damage, whatever the group agrees.
Documents in one place
Registration, insurance and the service book, next to the car they belong to.
Driving licences
Each driver's licence with its expiry date in view.
Running shared ownership across several cars?
Owners who sell shares in their own cars use Kai as the operating layer: every car runs as its own group of owners, and you keep the direct relationship with each of them. We'll set up one of your cars on a trial.
See it run on a real car.
The demo group holds a Porsche 911 Carrera 3.2 with bookings, trips, maintenance and costs already in it.