Cancelling a subscription means to cancel the next renewal.
All your data remains in the app after a subscription cancellation and you can use the Freebie subscription plan.
A subscription can be cancelled only with the service where you originally purchased it - Apple or Google Play
iOS - Apple
Subscriptions bought on iPhone/iPad are managed in your Apple account. For more information on how to cancel an Apple subscription click here.
Android - Google Play
Subscriptions bought in the Android app are managed in your Google Play account.
For more information click here.