Ten browser tools for the small jobs you keep doing by hand: bill splitting, percentages, unit conversion, date math, loan payments, age, BMI, discounts, word counts, and passwords.
What you get
- Every tool unlocked in full — no upgrade prompts
- Every tool added later, included free
- Works in any modern browser, nothing to install
- Activate on up to 3 devices
- No subscription, no renewals, no ads
How it works
Pay once. Your licence key arrives by email within a minute. Paste it at tool.koumen.net/account/ and every tool unlocks in that browser.
One-time payment of $29. No recurring charges, ever.
