Under a Free Plan i.e. when a user has not purchased any subscription then they are allowed to test all the features & options using the test payment gateway including recurring payments & many more along with checking the Affiliate Module & Multicurrency Module in Pabbly Subscription Billing. However, the option of testing the payments via Live gateways like PayPal, Stripe & Razorpay, etc is not allowed in the plan.
In short, all the features & options are accessible except the Live payment gateways working. Therefore, in order to check the software's working in Live mode, we advise purchasing a subscription for the same using this link -
https://www.pabbly.com/subscriptions/pricing/
For more info, please follow this doc -
https://www.pabbly.com/subscriptions/docs/introduction-of-pabbly-subscriptions/