Badger is a web app that chases unpaid invoices for freelancers and small businesses. After an invoice is added manually or imported from a CSV file, Badger emails the client a sequence of payment reminders on a set schedule, polite before the due date and firmer once it is overdue, in a tone the user chooses. Chasing stops automatically when the invoice is paid, and any single invoice or client can be paused. For business-to-business invoices, Badger calculates the statutory late-payment interest and fixed compensation allowed under UK law (the Late Payment of Commercial Debts (Interest) Act 1998) or EU rules (Directive 2011/7/EU) and states them in each reminder. Every invoice carries a payment link for card or PayPal, and online payments are marked paid automatically. Invoices can be raised in GBP, EUR, USD, CAD or AUD. A free plan covers up to three active invoices with all core features; paid plans add unlimited invoices, custom branding, team seats and API access.