Cairn — Bill Split & Budget

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.