box-breathing.org

What It Is

Box Breathing is a web app focused on box-breathing practice. Its core goal is to help users relieve anxiety, manage stress, and regain focus through equal-length inhalation and exhalation rhythms. It can be installed to a phone’s home screen as a PWA, offering an experience close to a native app. The copy also mentions that its native iOS app, Zen Box Breathing, offers an optional Pro subscription.

Core Features and Experience

Based on the text, it does not have AI model capabilities or intelligent generation features. More accurately, it is a breathing-assistance tool built on modern browser APIs. Key features include 8/10/12-second preset cycles, custom 4–60-second cycles, circular scaling animations, beep prompts, vibration feedback on Android, Wake Lock to prevent the screen from sleeping, Service Worker offline caching, and PWA installation. Use cases include short breaks at work, before meetings, during anxious moments, before sleep, or after waking up for 3–5-minute practice sessions.

Pricing and Privacy

The web PWA version is clearly free and can be used offline after the first load. Zen Box Pro for the native iOS app is an optional subscription, offering unlimited daily practice time, guided programs, custom rhythm control, and session history. However, the copy does not disclose specific pricing, payment methods, or trial policies. Its privacy positioning is fairly clear: the app runs locally, does not collect user data, sends no network requests except for loading resources, and stores settings only on the device.

Pros, Cons, and Limitations

Its strengths are that it is lightweight, requires no registration, is free, works offline, and combines animation, sound, and vibration in a way that suits eyes-closed practice. The downsides are also clear: it is not an AI tool; iOS Safari does not support web vibration due to security restrictions; mobile browsers have limited background operation; and the web version lacks long-term training management features such as course structures and history records. The copy also reminds users to seek medical help if they experience persistent breathing difficulties or chest pain.

Who It’s For and Access from China

It is suitable for individual users who want to start breathing practice quickly, value privacy, and only need simple rhythm guidance. Users who need Chinese-language content, professional meditation courses, data tracking, or personalized training plans may need to look for meditation apps or local breathing-training tools instead. The text does not specify access conditions in mainland China, so network availability and payment usability cannot be determined.