Based on the user reviews, here are three cons and pros of the Four Stones Online app, each limited to 15 words: **Pros:** 1. "Easily accessible and user-friendly, making it simple to meditate and track progress daily." 2. "Guided meditations and calming music help reduce stress and anxiety effectively." 3. "Challenging daily goals keep users motivated to develop a consistent meditation habit." **Cons:** 1. "Limited free content, with most features available only through in-app purchases." 2. "Some users experience technical issues, such as frequent crashes and poor sound quality." 3. "Too many ads and promotional materials interrupt the user experience and meditative atmosphere." Please note that these conclusions are based on the available user reviews and may not reflect the experiences of all users.