10-day refund on the license if the app does not calculate as described. What "as described" means is documented at /docs/formulas.
We will not refund you because you did not like the word HOBBY on your results. The app calculates the math objectively.
To claim it, email support@getcartmath.com with your WarriorPlus receipt within 10 days of purchase. Refunds are issued through WarriorPlus.