YuAn

YuAn is an on-device safety-monitoring app designed for people living independently: seamless, quiet protection that watches over you. How it works - Optionally, unlocking your phone counts as a check-in and refreshes your safety status; it runs silently in the background, so you never have to open the app on a schedule. Manual check-in and widget check-in are also available - pick what suits you. - If no check-in occurs within your configured timeout, YuAn alerts your emergency contacts by SMS and/or e-mail, including your latest location, last check-in time and your custom information. - Repeated alerts may continue until you confirm you are safe; the count and interval are customizable. - Monitoring resumes automatically after a reboot; when the timeout was exceeded, you can set a short window to check in after boot. - Alert e-mails are queued offline and resent automatically once the network returns. Privacy by design - All monitoring data (unlocks, location, alert logs) stays on your phone only, protecting your data security. - No account, no cloud monitoring, no ads or analytics; apart from feedback you actively submit, the app works offline with no other data ever uploaded. - Emergency contacts are yours to choose; alert content goes only to the people you trust. Deep customization - Timeout units (minutes/days/months), repeat-alert frequency and limits, daily sending caps and location sampling intervals are all configurable. - Alert templates support variables: name, address, contact info, last check-in time and current location. - Dual-SIM SMS fallback, offline e-mail retry and a post-boot grace window to check in after a restart. Extras - Home-screen countdown, check-in reminder notifications (check in right from the notification), a widget for one-tap check-in, and a history calendar with trends. - A clean interface in Chinese and English; app lock guards your privacy settings. Permissions overview - Notifications: monitoring status, check-in reminders and update notices. - Location: periodic sampling; alerts include your latest location. - SMS: alert messages to your chosen emergency contacts. - Phone state: SIM identification for automatic dual-SIM sending. - Start on boot: monitoring resumes automatically after reboot. - Exact alarms: timeout checks run on schedule. - Battery-optimization exemption: keeps the background watch stable. - Network: alert e-mails, update checks and feedback submission. - Foreground service: keeps on-device monitoring and check-in recording running.