Glossary
Offline mode
Offline mode is the ability of a guard tour app to capture checkpoint scans, incident reports, photos, and GPS readings without an active network connection — and sync them on reconnect with timestamp integrity preserved.
Definition
In guard tour software, offline mode is the technical capability that allows the mobile app to operate without connectivity. Required components: local event queue with persistence (SQLite or similar), server-signed timestamps (the device receives a signing key on last sync; events are signed locally and the server verifies on sync), checksum integrity (events can't be silently modified between capture and sync), and graceful sync with retries.
Context
Offline mode is the moat for any guard tour platform serving regulated industries. Without it, the platform is unsuitable for healthcare radiology zones, Tier III/IV data centers, NERC-CIP-regulated utilities, or NIS2-regulated infrastructure. Vendors who describe offline as 'limited' or 'partial' should be probed for specifics: how long, what events, how does sync handle conflicts.
True vs partial offline
'True' or 'end-to-end' offline mode handles all event types — scans, incidents, photos, GPS — for hours without connectivity. 'Partial' offline handles scans only, or requires periodic re-authentication, or loses photo data when the queue exceeds size limits. The distinction matters: hospital basements, data center white rooms, 220kV substations, and rural utility sites can be hours-or-shifts disconnected, not minutes.