This site describes the guarantee with this specific framing: two full months to see how it fits your routine.
This site connects the guarantee length directly to building the habit and evaluating fit — worth reading the 60-day window as functionally tied to giving the gradual, weeks-long timeline this site describes a fair chance.
Contact support directly within the 60-day window from your purchase date if it's not for you, referencing your order number, rather than assuming a refund happens automatically.