Useful content starts with a working activity and clear rules. Every game page explains its controls and scoring. Meditation sessions include the full original script so you can read it before starting.
Experience and evidence
We distinguish software behavior that can be tested from broader claims that need research. Improving a game score does not prove increased intelligence or clinical benefit. We avoid invented ratings, credentials, expert endorsements and guarantees.
Sources and limitations
Where we discuss health or research, sources and limitations matter. For an independent overview of meditation evidence, see the US National Center for Complementary and Integrative Health. The interactive guides here are for general personal practice and have not been clinically validated.
How this content is made
New scripts, instructions and software are created with AI-assisted development. Generated drafts need editorial checking; they do not imply that a named professional personally tested or reviewed them. Journal guides were rewritten on 10 October 2026 to remove unsupported claims and unverifiable biographies. Existing URLs were retained; the revised guides describe the current tools and their limits.
Corrections
If a rule, answer, source or control is wrong, send the page URL and a short description to hello@zehano.com. Do not include private journal entries or medical details in a bug report.