To add a free trial to a Subscription, navigate to Billing...Subscriptions...Create subscription
In the *Create a Subscription modal, enter the number of days for your free trial.
Using Stripe's API
Free trials can be added to a Subscription through Stripe's API. See Stripe's pre-built Checkout page for an example.
Stripe's full trial documentation can be found here.
Stripe presently allows for free trials to be set per price in Products...Add product
RevenueCat will correctly detect these trials, but Stripe recommends against this approach. Trials configured on Products will not be compatible with Stripe Checkout or quotes.
Updated 3 months ago