Yes, BetterSleep: Sleep tracker offers a free version with basic features, as well as a free trial period for users to explore premium features before committing to a subscription.

While BetterSleep: Sleep tracker can function offline for tracking sleep and using downloaded soundscapes, an internet connection is needed for certain features like accessing the full library of sounds and updates.

You can contact support or send feedback for BetterSleep: Sleep tracker through the app's help section or by visiting their official website, where you can find contact forms and customer service information.

You can manage or cancel your BetterSleep: Sleep tracker subscription through your device's app store settings, where you can view your subscriptions and make changes as needed.