Chi offers the following premium features with subscription: - Locked alarms - Screen time limitations - Scheduling routines and activities - Journaling with smart elements - Affirmation practices - Visualization practices - Breathing exercises - Special frequency sounds for a clear mind - Tracking the day Subscription: $8.99/month with 3-day free trial This app is licensed under the standard Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/