Kai Sharing
Co-Ownership Made Simple
Free · Designed for iPad. Not verified for macOS.
Kai makes sharing expensive assets simple. Whether you co-own an aircraft, boat, car, or any other shared resource, Kai helps your group stay organized and fair.
BOOKING & CALENDAR
• View availability at a glance with day, week, and month views
• Book assets in seconds with conflict prevention
• See who's using what and when
• Get notified about upcoming bookings
USAGE & COST TRACKING
• Log usage with automatic cost calculation
• Track hourly rates, fuel costs, and fees
• View your balance and monthly spending
• Fair cost sharing made transparent
MAINTENANCE MANAGEMENT
• Schedule recurring maintenance tasks
• Track hours-based or date-based intervals
• Get alerts when maintenance is due
• Keep your assets in top condition
COMMUNICATION
• Group announcements from administrators
• Direct messaging with members
• Report issues and squawks
• Stay informed with push notifications
DOCUMENT STORAGE
• Access important documents anywhere
• Insurance, registration, checklists
• Always have what you need on hand
PERFECT FOR
• Flying clubs and aircraft partnerships
• Boat syndicates and yacht clubs
• Car sharing groups
• Equipment co-ops
• Any group sharing valuable assets
Kai is designed by pilots and boat owners who understand the challenges of shared ownership. Join thousands of groups managing their assets the smart way.
more What's New in 2.0.8
- Manage your billing details in the app. Add your IBAN and a private or business invoicing profile (address, company name, VAT, tax ID, registration number) that appears on the invoices your group issues to you.
- Choose your default invoicing type: private, business, or follow your group's default.
- New setup checklist on your dashboard guides you through completing your profile so your invoices are correct.
- Polish and fixes in the profile screen.
2.0.8 Jun 27
Pay more online, manage expenses, and smarter booking waitlists.
• Online payments now cover membership fees and payment
requests, not just invoices. Pay with Checkout and return
straight back to the app.
• Expenses: edit an expense after adding it, and attach, view,
or replace PDF receipts.
2.0.7 Jun 20
Maintenance tracking improvements
- Your asset cards and detail screens now show every maintenance interval at a glance, not just the next one due.
- Time-based maintenance (annual, transponder, ELT, and similar) now shows a clear countdown in months and years, right alongside hour-based checks.
- Aircraft maintenance can now be tracked against either Hobbs hours or flying (airborne) hours, with each interval labeled so you know which meter it follows.
- Polished the maintenance layout so longer lists of intervals display cleanly without getting cut off.
2.0.6 Jun 18
New flights map!
2.0.5 Jun 15
- Notifications inbox so nothing slips by
- Usage logs adapt to each asset, whether you track hours, days, or distance
- Tidier numbers throughout, including cleaner usage totals
2.0.3 Jun 8
What's New in 2.0.2
Redesigned usage log details
Every flight and trip now opens in a cleaner, more detailed view: a flight timeline (block out, takeoff, landing, block in), flight and total time, engine (Hobbs) readings, and an itemised cost breakdown.
Accurate cost breakdowns
Costs now follow your group's billing meter exactly. Whether you bill on Hobbs, flight time, or block time, the hours and the total always line up.
Photos and custom fields
Usage logs now show their attached photos and any custom fields your group has set up, right alongside the rest of the log.
Plus the usual round of fixes and refinements.
2.0.2 Jun 7
Version 2.0.1
This update brings a few refinements and fixes:
- Overlapping bookings now sit side by side in the week view, so a busy day is easy to read at a glance.
- Your balance now shows reimbursements owed to you, not just what you owe.
- Sign-in now uses the official Google logo.
- Stability improvements and localization fixes across the app.
Thanks for using Kai. Keep the feedback coming.
2.0.1 Jun 6
A fresh new look across the whole app, plus features to keep you in the loop.
- Brand-new design — redesigned dashboard, calendar, assets, balance, profile, invoices, polls and more
- Notifications inbox — tap the bell to see bookings, approvals, invoices and group activity in one place
- Face ID lock — keep your group's financials private
- Guided demo tour for first-time users
- Polished usage log flow with per-asset-type fields and engine-hours meter-gap warnings
- Lots of localization, accessibility and stability fixes
2.0 May 27
• Edit usage logs and share notes with the group.
• Booking approval flow with cancelled / ended / pending banners.
• New "Special reservation" booking type.
1.1.6 Apr 28
Kai iOS v1.1.5
Dashboard
- Asset cards now show consumable levels with mini progress bars and maintenance remaining hours at a glance
Usage Logs
- Checkbox custom fields now use a toggle switch instead of a picker
- Custom fields with sections are grouped together on a single step in the interactive wizard
- Info-type custom fields are now displayed inline
- Engine hours fields are preserved for yachts even without a configured rate
Asset Details
- Added consumables section with levels and progress bars
- Added maintenance status section showing remaining hours per maintenance item
Issues
- Expanded issue detail view with full conversation and status management
Bookings
- Enhanced booking detail view
- Calendar improvements across day, week, and month views
Other
- Theme refinements
- Localization updates across all 9 languages
1.1.5 Apr 26
What's New in v1.1.4
- Custom handback fields: Groups can now define custom fields (checklists, text, numbers) that appear when logging usage — perfect for handback sheets, safety
checks, and condition reports
- Grouped sections: Custom fields are organized by section for a clean, scannable form
- Info text support: Group admins can add informational notices that display alongside checklist items
- Usage log detail: Custom field values now show in the log detail view with all items visible
- Bug fix: Editing a usage log no longer loses custom field data
1.1.4 Apr 24
1. Per-user calendar colors
- New memberColors map in AppState fetched from new /groups/:id/members endpoint
- Demo groups assign palette colors to demo booking user IDs
- Theme.swift refactored: assetColors → userColors (8-color palette), new buildUserColorMap / colorForUser helpers
- Calendar / Week / Day / Month views now color bookings by user instead of asset
2. Booking detail redesign
- Hero image header with asset photo, gradient overlay, and status badge overlaid
- New status banners: "This booking has been cancelled" and "This booking has ended"
- Past confirmed bookings now show as "Done" (gray) instead of "Confirmed"
- Shows booking title and purpose when present
- Icon fallback layout when no image
3. Issue severity/status alignment
- Severity renamed: critical/major/minor → high/medium/low (matches web)
- New issue statuses: open and in_progress
- Updated across IssueCardView, IssueDetailView, IssueFormView, IssuesListView
4. Small fixes
- BookingsListView, UsageLogsListView, UploadDocumentView, InteractiveUsageLogView — minor adjustments
- New translation keys across all 9 languages
1.1.2 Apr 7
- Images in chat
0.9.6 Mar 26
Face ID & Touch ID
- Unlock Kai with Face ID or Touch ID for quick, secure access
- After signing in, you'll be prompted to enable biometric authentication
- On your next app launch, Kai unlocks with a glance — no need to sign in again
- Enable or disable anytime from Profile → Settings
- Fallback to password sign-in if biometric auth is cancelled
0.9.5 Mar 23
- Added asset detail view
0.9.4 Mar 19
- Added attachments in usage logs as option
0.9.3 Mar 19
What's New
- Expenses You Owe — My Balance now shows your pending expense splits from expenses paid by other members, with the owed total included in the "You need to pay" hero amount
- Clearer consumable inputs — Usage log form now labels consumable fields as "Remaining Fuel", "Remaining Oil", etc. instead of just the consumable name
- Improved meter gap detection — Hobbs time is now used as the fallback meter reading for aircraft, instead of engine hours
- Simplified rate calculation — Usage cost rate is auto-detected from asset details and pre-filled in the form
- Expense detail sheet — Tap any expense in My Balance to view its details
- Better currency handling — Group currency is now pulled from group settings instead of invoice/expense data
Bug Fixes
- Fixed empty state showing incorrectly when only expense splits were present
- Fixed rate-per-unit calculation using a streamlined fallback chain across all asset types
0.9.2 Mar 17
- Engine hours tracking — Asset details now include engine hours for applicable assets, giving you a more complete picture of usage.
- Smarter meter readings — The app fetches the last recorded meter reading automatically, making it faster to log new usage.
- Meter gap warnings — Get a visual warning when there's a gap in meter readings, helping you catch missing logs early.
- Expanded asset type support — Usage logging now supports additional asset types for broader coverage.
- Accurate usage units — Dynamic fields in usage log review now use authoritative units from asset configuration, ensuring correct calculations.
- Improved usage log flow — Enhanced the interactive logging experience with better configuration retrieval.
- Localization improvements — New strings translated across all supported languages for a smoother experience.
0.9.1 Mar 15
- Fix import kml from Foreflight and SkyDemon when logged out
0.8 Mar 8
- Fix in chat windows returning to list of chats automatically
- Added translations
0.7 Feb 24
- Unread badges on Messages and Bulletins tabs — see at a glance how many unread conversations and announcements you have
- Import flight logs from ForeFlight and SkyDemon KML files
- Bug fixes and improvements
0.6 Feb 21
• My Balance & Invoices - Track your account balance and view invoices directly in the app
• Landing Fees - Automatic invoicing for landings at known airfields
• Real-time Chat - Instant messaging with live updates
• Meeting Polls - Create and vote on meeting times with your group
• Fresh New Look - Updated branding throughout the app
0.5 12/31/2025
Fixed bug in signing out, popup keeps appearing.
Fixed some background colors.
0.4 12/06/2025
What's New in 2.0.8
- Manage your billing details in the app. Add your IBAN and a private or business invoicing profile (address, company name, VAT, tax ID, registration number) that appears on the invoices your group issues to you.
- Choose your default invoicing type: private, business, or follow your group's default.
- New setup checklist on your dashboard guides you through completing your profile so your invoices are correct.
- Polish and fixes in the profile screen.
more Version 2.0.8 Jun 27
Data Not Linked to You The following data may be collected but it is not linked to your identity:
Financial Info Contact Info User Content