A privacy-first, manual personal expense tracker (PWA) — inspired by Quanto. Fast entry, a clean purple UI, charts & analytics. No bank syncing. Your data stays on your device unless you opt into cloud sync.

One codebase runs as a web app and installs as a PWA on iPhone (and Android/desktop).

• ⚡ Fast entry — numeric keypad + one-tap category quick-pick (center + button)
• 📊 Dashboard — total balance, spend-by-category donut, recent transactions
• 📈 Insights — spending-over-time bar chart, daily transaction lists, week/month/quarter/year
• 🎯 Budgets — per-category monthly limits with progress bars + swipe-to-delete
• 🏦 Accounts — cash/checking/savings/credit, multi-account, transfers between accounts
• 🔁 Recurring — daily/weekly/monthly/yearly rules, auto-materialized on open
• 💱 Multi-currency — per-account currency, Intl-formatted everywhere
• 📤 CSV import/export — move data in and out
• 🙈 Hide balances — privacy toggle masks all amounts
• 📅 Custom month start — align budgets to your payday
• 🔒 Local-first — IndexedDB (Dexie); no account required; optional Supabase sync

React + Vite + TypeScript · Tailwind · Zustand · Dexie (IndexedDB) · Recharts · lucide-react · vite-plugin-pwa (Workbox) · Supabase (optional sync).

npm install
npm run dev          # http://localhost:5173
npm run build        # production build (also generates the service worker)
npm run preview      # serve the production build locally

1. Open the app's URL in Safari.
2. Tap Share → Add to Home Screen.
3. Launch it from the home-screen icon — it runs fullscreen, offline, and looks like a native app.

iOS has no triple-tap-to-launch, but you can wire one yourself:

1. Shortcuts app → create a shortcut → Open URL → your app's URL → name it (e.g. "Spend").
2. Settings → Accessibility → Touch → Back Tap → Triple Tap → choose your shortcut.
3. Now triple-tapping the back of the iPhone opens the tracker instantly.

(This is an OS feature the user enables — the app just needs to be reachable by URL / installed.)

The app works fully offline after first load (service worker precaches the shell; all data lives in IndexedDB). Verify: DevTools → Network → Offline → reload → app still works.

Sync is off by default to keep the app private. To enable cross-device sync:

1. Create a Supabase project, then copy .env.example → .env.local and fill in:

   VITE_SUPABASE_URL=...
   VITE_SUPABASE_ANON_KEY=...
   

2. Create the table + row-level security:

   create table transactions (
     id uuid primary key,
     user_id uuid not null references auth.users(id),
     payload jsonb not null,
     updated_at bigint not null
   );
   alter table transactions enable row level security;
   create policy "own rows" on transactions
     for all using (auth.uid() = user_id) with check (auth.uid() = user_id);

3. In the app: Settings → Cloud sync → enter your email → magic-link sign-in → Sync now.

Sync is last-write-wins per transaction (by updatedAt). Local stays the source of truth while offline; signing in reconciles both directions.

date,type,amount,category,account,currency,note — e.g. 2026-06-30,expense,12.50,Food & Drink,Cash,USD,Lunch. Unknown categories/accounts are created on import.

No analytics or tracking SDKs. All financial data is stored locally in your browser (IndexedDB) and never leaves your device unless you explicitly enable Supabase sync.

⚠️ Don't enter real third-party financial data while testing — use sample data.