No accounts, ads, purchases, chat or remote analytics. Practice data is not automatically uploaded. The web version saves in this browser; the packaged version prefers native local storage. Age band, preferences, results and personal codes are used on this device. Export, import or erase them; you control exported files. Device backups depend on OS settings.
Narration uses device speech capabilities: native system speech on iOS and voices explicitly marked local in the browser. The app does not send instruction text to an app-operated cloud narration service. Available languages and quality depend on the device and installed voices.
This is memory-strategy and task practice. No promise of photographic memory, higher IQ, treatment or competition readiness in a month. Progress varies.
Visiting this website
The app has no remote analytics or advertising and does not automatically upload practice records. When you visit this website, the host may process IP addresses, browser details and request times to deliver pages, protect the service and troubleshoot problems. These technical data are not linked to your local practice records. Starting with 8.1.0 (81006), adults may explicitly download optional background music and result-character images, which are verified and cached on the device. Downloads contact our Tokyo media server, which may process IP addresses, request times and ordinary technical information for file delivery, security and troubleshooting. Practice records, answers and advertising identifiers are not uploaded, and requests are not linked to personal practice records. Core training works offline without downloads, and users can restore bundled media. Media requests are not used for advertising profiles.
Support and retention
If you email us, we process your email address and the details you provide to answer and handle your request. Please do not include unnecessary personal information. We retain this information only while needed for your request or applicable obligations. Contact support to request deletion.
Do not put passwords, contact details or private information into personal codes. Backups contain what you enter; keep them private.
Children’s experience
The age band adjusts practice pace locally; it is not age verification. Adults should assist children with settings and external contact. This release has no user chat, public profiles, advertising or purchases.