Privacy Policy
Privacy Policy Effective date: 2026-09-18 Flash (the “Service”) is a mobile arithmetic training application provided by yeeun seo (the “Developer”). This Privacy Policy explains what information is stored locally by the Service, what information may be processed by third-party services used by the Service, and the choices available to users. Summary Flash is free to download and may offer optional in-app purchases and subscriptions. Advertising may be shown to users who do not have Premium. Flash does not require an account or sign-in. Practice settings, presets, exam progress, and temporary rewarded-access information are stored locally using platform-provided app storage. Flash does not operate its own backend for storing raw learning records such as problem number sequences or entered answers, and it does not provide learning-data synchronization between devices. ...