How do I save with the yearly plan?

Annual billing costs 50% less than paying month by month, so you effectively get 6 months free every year.

Why so generous? Committed yearly customers give us predictable revenue, and that lets us invest more in developing the product instead of spending it on ads to replace churned users. As a bonus, on annual billing your credits are valid for 3 months instead of 2, so unused credits carry further.