A dashboard your family CFO will love.
Total net worth, monthly delta, and a Swift Charts curve over 6M / 12M / All time — broken down by account kind and member.
Cairn for Mac, iPhone & iPad
One stone a month.
A whole family's trail.
Cairn is a calm, private net-worth check-up for families. No transactions to categorize, no API keys, no cloud account — just one screen a month, and a beautiful trend you can actually trust.
🔒 Local-only storage
💱 Multi-currency
🇬🇧 EN · 🇨🇳 简体中文
3 min
Monthly check-up
0
Accounts to sign into
∞
Currencies per account
100%
Stays on your device
The product tour
Designed like the rest of your Apple devices.
Four screens, four moments — from the dashboard to your monthly snapshot.
Track progress over time.
Compare members side by side, scrub through monthly snapshots, and watch your trail of stones grow — one row, one month at a time.
Excel-style batch entry, in 3 minutes.
One row per holding, last month's values pre-filled. Fill from last for unchanged rows, edit only what changed, Save all — atomic commit, done.
Multi-currency, real-life portfolios.
One account holds CNY, USD, HKD, AUD… at the same time. Live ECB rates convert everything to your home currency — and works offline with cached rates.
👨👩👧
Whole-family view
Group accounts under each member, switch between per-member and aggregated views with a tap.
📈
Net-worth trend
Beautiful Swift Charts curves with breakdowns by account kind and member, plus monthly snapshot detail.
🏠
Physical assets
Real estate, vehicles, devices — tracked alongside financials with their own cumulative value chart.
🔔
Gentle monthly reminder
Optional local notification on the 1st. No push servers. No account required.
📦
Portable backups
Export your whole store as a single human-readable .cairn JSON, or snapshots as CSV.
🌐
EN & 简体中文
Every string in Apple's String Catalog. Override the app language independently of the system.
Privacy by design
Your money stays on your Mac.
Cairn stores everything in a local-only SwiftData database inside the app sandbox. The only network call is fetching public ECB exchange rates — no analytics, no ad SDKs, no account system, no CloudKit. Ever.
- Local-only. CloudKit sync is intentionally off.
- No accounts. Nothing to sign up for, nothing to forget.
- Open source. Apache 2.0 — read the code, build it yourself.
Get Cairn
macOS 14 Sonoma or iOS / iPadOS 17+. The macOS build is ad-hoc signed, so first launch needs Control-click → Open.
iOS / iPadOS: open the project in Xcode, sign with a free Personal Team, run from source.