Sigh: Cyclic Breathing is an iPhone app designed to help users manage anxiety through cyclical breathing techniques. The app focuses on the proven benefits of cyclical breathing, which can improve mood and reduce respiratory rate more effectively than mindfulness meditation. By following the animated guide that expands with each inhale and contracts with each exhale, users can engage in deep breathing exercises. Additionally, users can customize session lengths, receive notifications for breathing sessions, and track their progress in the Health app.

Sigh offers both monthly and yearly auto-renewing subscriptions, as well as a Lifetime subscription option for unlimited access to all features. Users can easily manage their subscriptions and turn off auto-renewal within their Account Settings. For more information on terms and conditions, users can refer to the provided links for the Terms of Service and Privacy Policy.