What is a free trial?

A free trial lets a user try a paid plan for a few days before the first charge, and converts to a paid subscription unless cancelled.

Trials raise how many people start and lower how many pay; the product of the two is what matters. They suit apps whose value takes a few days to show.

A charge the user did not expect is among the most common reasons for a one-star review, so say plainly when the trial ends and what it costs.