Basically a feature which would allow service providers to offer the client to start with a certain trial period and then use a different paid period, so example:

1. Trial period is 7 days
2. After this 7 days trial, the client gets an invoice for 1st paid month, if he pays, good to continue with the service, if not, his trial won't continue.

Hopefully it make sense,

Thank you,
Brad @ CodiesLAB.tech