How Your Data Is Handled

Your subscription data never touches our database.

Data Flow

You
upload
→Just Cancel
relay
→Claude
analyze
→Your Browser
store results
The server passes your file to Claude. It doesn't save it.

What Each Party Sees

Claude (Anthropic)

Your statement — To find subscriptions

Your Browser

The results — Stored in localStorage so you can see them

Just Cancel Server

Random ID + timestamp — To connect your payment to your scan

What's Stored Where

Your Browser (localStorage)

Subscription names
Amounts
Cancel links
Scan results

Cleared when you clear browser data or after 48 hours

Just Cancel Database

Random ID for your scan
Timestamp
Whether you paid

Just enough to connect your payment to your scan

Anthropic (Claude)

Statement sent for analysis

Anthropic's data retention policy applies

The Code

From the scan endpoint — this is what gets saved to the database:

app/api/scan/route.ts

.from('pending_scans')
.insert({
  scan_token: scanToken,
  expires_at: new Date(Date.now() + 24 * 60 * 60 * 1000).toISOString(),
});

And this is how results are saved client-side:

lib/scan-storage.ts

localStorage.setItem(
  `jfc_scan_${scanToken}`,
  JSON.stringify({
    subscriptions: data.subscriptions,
    ambiguous: data.ambiguous,
    timestamp: Date.now(),
  })
);

Your Browser Storage

Just Cancel data currently in this browser:

Database Schema

The pending_scans table:

id: uuid
scan_token: text
expires_at: timestamp
paid: boolean

No columns for subscriptions, amounts, or transaction data.

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