guard2

Guard2 is an automated Android device monitor designed to help families and caregivers care for loved ones with minimal effort. It watches the device — not the person — so loved ones can stay independent while caregivers can stay informed.

Without requiring anyone to manually check in, Guard2 tracks basic device signals — such as background device heartbeats and screen unlocks — as indicators of device status and routine. Once monitoring is started, caregivers stay informed through automatic email updates and daytime-calculated alerts.

Guard2 does not monitor messages, calls, location, or app content. It only observes basic device-level signals.

📧 **Stay Informed: 6 Automatic Status & Alert Emails**

Caregivers can confirm the monitoring state through automatic email updates:

**Monitoring Started**

Sent immediately when monitoring begins. Confirms that the device is online, registered, and being monitored.

**Monitoring Stopped**

Sent immediately when monitoring is manually stopped on the device, or automatically when the monitoring period expires.

**Heartbeat Timeout Alert**

Triggered when no device heartbeat is received for more than 2 counted daytime hours (07:00–23:00). This may indicate that the device is shut down, powered off, or disconnected from the network.

**Screen Unlock Inactivity Alert**

Triggered when the screen remains locked for more than 6 counted daytime hours (07:00–23:00), indicating that the device has not been actively used during the day.

**Heartbeat Recovery**

Sent automatically when a previously offline device reconnects and resumes sending normal heartbeats.

**Activity Recovery (Screen Unlocked)**

Sent automatically when the device screen is unlocked, confirming that the device is active again.

🌙 **Smart Daytime Protection**

Guard2 accumulates abnormal duration only during daytime hours (07:00–23:00). Time elapsed during the night (23:00–07:00) is not counted toward the alert thresholds, and no alerts are triggered during these hours.

If an abnormal state persists across the night, Guard2 resumes accumulating the daytime duration at 07:00 the following day, continuing from the daytime time already accumulated before the night period.

**Examples:**

**Heartbeat stops at 22:00:**

1 hour is accumulated between 22:00 and 23:00. The 23:00–07:00 night period is excluded. Accumulation resumes at 07:00 the next day, and an alert triggers at approximately 08:00 after a total of 2 counted daytime hours without a heartbeat.

**No unlock after 21:00:**

2 hours are accumulated between 21:00 and 23:00. The 23:00–07:00 night period is excluded. Accumulation resumes at 07:00 the next day, and an alert triggers at approximately 11:00 after a total of 6 counted daytime hours without an unlock.

More information about Guard2, including how it works and our privacy approach, is available at:

https://guard2.site