Run shared ownership clearly, fairly, and without spreadsheets.
Kai is the operating system for groups that share an aircraft, a boat, a car, or anything else expensive.
Everything in Kai is organised around a group — a flying club, a boat partnership, a family with a shared cabin, three friends and one car. The product follows how groups actually behave.
Before, and after
What changes when a group moves from improvised admin to a real system.
- A WhatsApp thread no one can scroll back through
- A spreadsheet one person updates and everyone else trusts
- Receipts that live in a glove box until they don't
- Maintenance reminders that live in someone's head until something breaks
- A shared calendar that refuses double bookings
- Receipts that upload from a phone and split by your rules
- Live balances every member can see, settled by Stripe
- Maintenance that reminds itself, before things slip
What Kai actually does
Seven pillars that cover how a real group actually runs — booking the asset, settling the money, logging what happened, keeping it airworthy, and making the conversation findable.
A real shared calendar
Stops the WhatsApp thread where "is the plane free Saturday?" goes to die.
- Conflict prevention that actually works — no two members showing up for the same slot
- Booking rules you can shape: quotas, peak-period caps, advance windows, per-asset configs
- Day, week and month views across all your assets
- iCal sync to Google Calendar, Apple Calendar or Outlook
Money, in the open
Live balances, automated splits, and online payments that settle themselves.
- Receipts upload from a phone; splits run on your group's rules
- Members see what they owe and what they're owed in real time
- Pay invoices in one click via Stripe — Kai marks them paid automatically
- Auto-sync to Yuki, Moneybird, Exact Online and e-Boekhouden — no quarter-end re-entry
Usage logged the right way
Real numbers feeding real costs — not estimates, not guesses.
- Hours, trips, distance or days — whatever your asset actually measures
- Cost attribution flows automatically from each entry into the right invoice
- Pilots: KML import from SkyDemon and ForeFlight pre-fills the log
- Per-asset and per-member breakdowns, exportable as CSV or PDF
Maintenance that doesn't slip
Scheduled service, hour-based intervals, squawks captured the moment they happen.
- Recurring maintenance with reminders before things are due — not after
- Meter-based intervals tied to the real usage log, not someone's memory
- Squawks reported with photos, attached to the asset, visible to everyone
- Overdue and upcoming alerts so nothing goes quietly past
Built for groups, not individuals
Roles, decisions, audit trails — the parts that make a co-ownership feel fair.
- Role-based access: owners, admins, members, students, guests
- Transparent balances and responsibilities so nobody has to guess
- Shared rules and lightweight voting for group decisions
- Full audit trail with timestamps and user attribution
One place for the conversation
Asset-related messages live next to the calendar and costs — not in a chat app nobody searches.
- Group messaging and threads you can actually find later
- Bulletin board for announcements that reach everyone
- Meeting polls so "when can we meet?" takes one round, not ten
- In-app notifications with sensible defaults
Talk to your data with Claude
Natural-language queries across bookings, expenses, maintenance and members — plus a real API for what you want to build yourself.
- MCP server for Claude Desktop and Claude Code
- Ask plain-English questions across all your asset data
- API key management with per-key usage tracking
- 14+ tools out of the box; npm install — set up in under a minute
Built for real groups, real assets
Kai adapts to how your group actually operates — not the other way around.
Aircraft and flying clubs
- Hobbs- and tach-driven cost calculation
- Automatic 100-hour and annual reminders
- Squawks tied to the aircraft, not buried in a chat
- Fair-access rules for the Saturday morning slot
Cars and shared vehicles
- Odometer-based usage and fuel tracking
- Hybrid splits — fixed costs equal, variable by use
- A shared calendar everyone actually trusts
- Reimbursements with receipts, not WhatsApp screenshots
Boats, properties, simulators, and more
- Asset-specific fields and workflows
- Flexible usage models per asset type
- Shared documents and history that don't get lost
Try it now — no sign-up
Open a fully-populated demo group and click around for five minutes. See how the calendar, costs, balances and history fit together.
No sign-up · No card · Instant access