Please note that according to the App subscription terms and conditions, whether you register with Nüli Website, or via Apple Store / Google Play Store, the official subscription and payment will be engaged automatically at the end of the free trial.
However, don't worry😌, if you wish not to proceed to later stage with a new subscription plan, just complete the cancellation at least 24 hours prior to your current subscription ends.
Please refer to "How do I cancel my subscription?" if needed.