How is this different from Subscription Expense Tracker?

That tool totals monthly/yearly spend. Bill Tracker is a due-day calendar: mark each occurrence paid or skipped.

Where is the data stored?

Only in this browser's localStorage. Another device or cleared site data will not keep the catalog.

Short months clamp to the last calendar day, so February 31 becomes Feb 28 (or 29).

No. It is a private checklist, not a bank feed, autopay or notification service.

Bill Tracker runs entirely in your browser on DevTools — no signup, no upload.

Bill Tracker is a free in-browser utility, not a hosted API, and keeps no server-side history.

Using Bill Tracker
Open Bill Tracker, enter or paste your input, and copy the result.

Track supplements by meal, empty or with food, and mark taken or skipped on a private calendar.

Write JavaScript, press Run, and read console output in your browser.

Compile TypeScript to JavaScript in your tab and inspect console output.

Write Dart, press Run, and see print output in your browser.

Run Ruby in your browser with ruby.wasm. First Run downloads the VM, then caches it.

Life Path, Destiny, Soul Urge and Personality numbers from a birth name and date.