Xopoz

Important Limitations — Read First

• Requires internet. Emergency messages cannot be sent or received without an active network connection. If the network is down, the alert is queued and sent when the connection returns.
• Team only. Alerts are sent to your Xopoz team members only — not to emergency services (911, 112, etc.).
• Requires a team. If you are not a member of any team, the Alert entry shows “You must be inside a team to send an alert”.
• Not instant delivery. Recipients receive the alert when their device next synchronises with the server.

Sending an SOS Alert

1. Open the side menu and tap the red Alert tile (marked SOS).
2. If you belong to several teams, a dialog asks you to select the target team(s). Cancel is on the left, Send SOS on the right. With a single team this step is skipped.
3. The EMERGENCY ALERT screen shows the recipients (Send to: …).
4. Optionally type a short message. Your current GPS position is always included automatically.
5. Tap the large red SEND SOS NOW button. The phone vibrates and the button reads SENDING EMERGENCY….
6. A message confirms “Emergency alert sent to 1 team(s)!” and the screen closes. Without network you see “Alert queued for delivery — sending in background” instead.

To abort before sending, press the Back key.

Receiving an SOS Alert

When a team member sends an SOS, all other team members receive:

• A full-screen emergency popup titled Xopoz Sos received with an alarm ringtone. Stop Alarm silences the ringtone; Close this message dismisses the popup
• A high-priority persistent notification that stays until acknowledged
• The sender's device name and team context
• A direct link to navigate to the sender's last known GPS position on the map

Security & Encryption

Emergency messages use the same end-to-end encryption as all team communications:

• Your GPS position is encrypted separately from the message text
• If you send to multiple teams, each team receives a differently-encrypted copy using its own key
• The server stores and routes encrypted data only — it cannot read your location or message

No Guarantee of Reliability

Emergency and field situations introduce numerous unpredictable factors entirely outside the application's control:

• User stress: under pressure, users may tap incorrect buttons, miss confirmation steps, or misread on-screen information.
• Insufficient battery: a device with low or depleted battery cannot send or receive alerts or maintain background services.
• Network connectivity: poor, intermittent, or absent mobile data or Wi-Fi will prevent SOS delivery and position sharing.
• GPS signal quality: dense buildings, underground locations, heavy foliage, or adverse weather can degrade or block GPS reception.
• Operating system behaviour: Android and modified Android distributions (such as EMUI, MIUI, ColorOS, OneUI) may exhibit unpredictable behaviour regarding real-time scheduling, background service management, and GPS access — potentially delaying or preventing alerts without warning.
• Device limitations: hardware defects or insufficient storage can impair operation.
• Human factors: forgetting to charge the device, not enabling location permissions, joining the wrong team, or misconfiguring settings.
• This list is not exhaustive. Other unforeseen factors may affect the application's operation.

Always treat Xopoz as a supplementary tool, not a primary safety system. Maintain independent emergency plans, backup communication methods, and always call official emergency services (112, 911, etc.) first.

Recommended Practice

Before relying on Xopoz SOS in the field, verify that:

• All team members have the app running with background location active
• Everyone has internet connectivity in the area you will be working
• You have tested sending and receiving an alert at least once in a non-emergency context