Unsub

What it is

Unsub connects to a bank via Plaid, pulls the recurring outflow streams from Plaid's transactionsRecurringGet endpoint, and normalizes each one into a subscription with a monthly and annualized figure regardless of billing cadence (weekly through yearly). It flags price increases when the latest charge exceeds a stream's own average by more than 5%, sorts by biggest drain first, and matches each merchant against a hand-curated library of UK cancellation playbooks. Each playbook carries a difficulty rating, the cancellation method, the documented dark patterns, and step-by-step instructions. It's a Next.js 16 / React 19 app running against Plaid sandbox, and Jordan is deliberately honest that it's a clickable demo, not production: no auth or encryption-at-rest yet.

Highlights

• ◆Money math is fully unit-tested: 8 node:test cases (all passing) cover annualization across every Plaid frequency, monthly normalization, price-increase flagging, and burn summing
• ◆Playbook matching uses word-boundary regex, not loose substring, with an explicit test that 'SKY DIGITAL' matches Sky but 'Skyscanner' does not
• ◆13 curated UK merchant playbooks (Sky, Virgin, PureGym, The Gym Group, David Lloyd, Audible, Lyca Mobile...) each with difficulty rating, dark-pattern notes, and cancel steps
• ◆Handles Plaid's async reality: warms transactionsSync, then returns HTTP 202 with a pending flag on PRODUCT_NOT_READY so the client retries instead of erroring
• ◆Modern stack, Next.js 16.2 App Router on React 19.2 with the API split into link-token, token-exchange, and subscriptions routes
• ◆Honest scoping in the README: auth, encryption, trial-conversion alerts, and production Plaid are explicitly deferred to the 'decide it's a business' phase