Cairn — Bill Split & Budget
Split bills & track spending
$5.99 · Designed for iPad
Split shared bills, track every dollar, and budget with beautiful charts — private, on your device, and 100% free. Meet Cairn.
Cairn is the simple, beautiful way to split bills and track your monthly spending — whether you're sharing costs with roommates, managing your own money, or keeping your family's budget on track.
SPLIT BILLS THE FAIR WAY
Living with roommates or sharing expenses? Cairn makes splitting rent, groceries, and utilities effortless. See who owes what at a glance, split fairly, and settle up without the awkward conversations.
TRACK EVERY DOLLAR
Log your daily expenses in seconds. Categorize spending automatically and see exactly where your money goes each month. No complicated setup, no steep learning curve — just open the app and start tracking.
SET MONTHLY BUDGETS
Create custom budgets for groceries, dining, entertainment, rent, and more. Cairn keeps you on track with real-time progress bars so you always know how much you have left to spend before the month ends.
NEVER MISS A BILL
Add your recurring bills and get timely reminders before each due date. From rent and utilities to streaming subscriptions, Cairn makes sure nothing slips through the cracks.
SMART INSIGHTS
Cairn learns from your spending habits and delivers personalized tips to help you save more. Get weekly summaries, spot trends, and discover opportunities to cut back — all powered by intelligent analysis of your data.
BEAUTIFUL REPORTS & CHARTS
See your finances come to life with clean, colorful charts and visual breakdowns. Monthly reports make it easy to understand your spending patterns and celebrate your progress.
DESIGNED FOR EVERYONE
Whether you're a college student watching every dollar, a young professional building savings, or a family working toward financial goals, Cairn adapts to your life.
100% FREE — NO HIDDEN COSTS
Cairn is completely free with all features included. No subscriptions, no in-app purchases, no ads. Every feature — bill splitting, smart insights, unlimited budgets, and detailed reports — is yours from day one.
YOUR PRIVACY MATTERS
Cairn does not collect, transmit, or share any of your data. Everything is stored locally on your device. No account required, no internet connection needed. Your financial information never leaves your phone.
Start your journey to better money management today. Download Cairn and make every dollar count.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Budget Boss is now Cairn — same app, brand-new name! Split bills fairly, track your spending, and budget with beautiful charts — all private and 100% on your device. Thank you for using Cairn.
The developer, Chris Honeychurch, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Chris Honeychurch
- Size
- 7.9 MB
- Category
- Finance
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Chris Honeychurch
