Cairn Finance

Finance

Free

Cairn reads your accounts on-device, lets you write your own rules and tags, and finds subscriptions automatically. No account, no server, no tracking. Cairn is a private personal finance app for iPhone, iPad, and Mac. It reads the bank accounts you authorize through SimpleFIN, then does everything else on your device. NO ACCOUNT. NO SERVER. NO TRACKING. NO CAIRN ACCOUNT. NO CAIRN BACKEND. NO TRACKING. There is no Cairn backend. Your transactions never pass through a server we run, and the app has no analytics, advertising, or third-party runtime SDKs. Cairn communicates directly with the SimpleFIN server you choose and, only if you enable it, your private iCloud database. REQUIRES SIMPLEFIN Cairn is free: it has no subscription, account, or service fee. Automatic bank sync requires your own SimpleFIN Bridge account, a separate paid service billed by SimpleFIN—not Cairn. Cairn can identify transfers between your accounts, but it never moves money. Thank you to SimpleFIN for the Bridge service and SimpleFIN protocol that make direct, read-only bank connections possible. Cairn is not affiliated with SimpleFIN or any financial institution. KNOW WHERE YOU STAND • See accounts, balances, and transactions, with net worth kept separate per currency. • Net-worth history that builds from your own data. • Investments and holdings, with cost basis and gain. CATEGORIZE YOUR OWN WAY • Write your own rules to categorize transactions by description or amount. • Add free-form tags and notes to any transaction. • Automation always yields to you: a category you set by hand is never overwritten. • Everything is enriched on your device. FIND SUBSCRIPTIONS AUTOMATICALLY • Cairn spots subscriptions and other regular payments, and shows the expected next charge. PRIVATE BY DESIGN • Financial fields are end-to-end encrypted in iCloud, independent of Advanced Data Protection — Apple stores the record, not the amount. • Your SimpleFIN credential lives in the Keychain, never in the database or logs. • Optional Face ID / Touch ID app lock. • Export everything to CSV or JSON, or delete it all. REQUIRES SIMPLEFIN Cairn connects to SimpleFIN Bridge or a bank-hosted SimpleFIN server. It is read-only: Cairn can reconcile money between your accounts, but it never moves money. Cairn is open source under Apache-2.0. Cairn is not affiliated with SimpleFIN or any financial institution.

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Budgets • Set monthly spending limits per category, with one-month overrides and suggestions based on your own history. • Spread a large one-time purchase across several months without changing the transaction or your account balance. • Export budgets as CSV, or reset every limit at once without losing accounts or transactions. Organize • Rules can rename transactions, apply tags, and compact matching rows. Multiple rules now combine, and higher rules win. • See every rule that matched a transaction and open its editor in one tap. • A Review Inbox in Activity gathers uncategorized, unreviewed, and changed transactions, with explanations and undo. Understand your money • A per-currency cash-flow forecast, with bills and income you confirm as your own plans. • Link an outgoing expense to an incoming reimbursement and see gross, received, net, and outstanding amounts. • Insights subtracts categorized reimbursements and adds a category chart with tap-through detail. • Merchant pages collect a merchant's transactions and week, month, and year totals. Investments • A dedicated Investments view with position totals and mix per currency, searchable holdings, and balance history. Widgets, alerts, and Shortcuts • Home Screen widgets for net worth and month-to-date spending, plus forecast widgets for the Home and Lock Screen. • Optional alerts for connection problems, forecast shortfalls, and upcoming plans, each with its own control. • "Sync Cairn" and read-only status actions for Siri, Shortcuts, and Spotlight. Sources and reliability • A Connection Health center showing when each source last synced and what needs attention. • Institution groups on Home show a cached favicon from the institution's own website. • Choose which sections appear in the tab bar or sidebar, and reorder them. Also improved • Card payments and transfers no longer count as spending, and security trades are treated as money movement. • Older history backfills in 45-day pages, and Activity loads as you scroll instead of all at once. • Categories can be added, renamed, recolored, reordered, archived, and deleted when unused. • Manual accounts can be edited in the app, including adding, editing, and deleting single transactions. • Better VoiceOver support across controls and charts, Dynamic Type, Reduce Motion, and Reduce Transparency. • Sync is more resilient: paused sync resumes on its own, failures stay visible with retry, and offline use is explained. • Your data stays private: CloudKit encrypts every field that reveals financial detail, and iCloud Sync is off by default on new installs.

The developer, Sehej Jain, 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.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    Sehej Jain
    Size
    11.5 MB
    Category
    Finance
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • iPad
      Requires iPadOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later.
    • Apple Vision
      Requires visionOS 26.0 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Sehej Jain