The one-month free trial period is available only for first-time use of TimeTree premium.
There is no free trial period if you are using an account that has already been registered for TimeTree Premium.
If the trial is not canceled at least 24 hours before ending, the trial will automatically become a paid subscription and you will be billed for the monthly or annual fee.
TimeTree Premium can be managed and canceled from the App Store or Google Play Store settings.
Please note that deleting the app does not cancel the service.