Zero Data Storage

Your financial data lives only in your Google Sheets. We never store, process, or have access to your sensitive information.

Why Zero Storage Matters

Full ownership — your data is in your Google Drive, accessible only by you
No data breaches possible — we can't leak what we don't have
GDPR-friendly by design — no personal financial data on our servers
Data persists after account deletion — your spreadsheet stays in your Drive forever

How It Works

1

Sign in with Google

When you sign in, we request permission to create and edit a single Google Sheets spreadsheet in your Drive.

2

Spreadsheet auto-created

A dedicated spreadsheet is automatically created in your Google Drive. This is where all your asset data will live.

3

Read and write directly

Every time you add, edit, or view assets, we read from and write to your spreadsheet in real time. Our servers act only as a pass-through.

4

Verify anytime

Open Google Sheets directly to see your raw data. What you see there is exactly what the app uses — no hidden copies, no server-side databases.

Architecture Deep Dive

WalletMap uses a BFF (Backend for Frontend) architecture where the Next.js API routes communicate directly with the Google Sheets API. When you request your dashboard, the server fetches data from your spreadsheet, enriches it with live market prices, and sends it to your browser. At no point is your financial data persisted on our infrastructure. Even our database only stores your basic Google profile (name and email) for authentication purposes.

Ready to Take Control of Your Assets?

Start tracking your assets with complete privacy. Your data never leaves your Google Drive.