A commuter boards the RE7 train from Berlin to Dessau. Cellular data is erratic, dropping entirely between stations. They open Synapse.
The app detects the lack of server handshake and immediately enters 'Echo-Mode'—a lightweight, locally-saved session that preserves progress without nagging for a connection.
The interface shifts to a high-contrast 'Stone' palette to compensate for the harsh morning glare hitting the train window. The haptic feedback pulse is increased by 15% to remain perceptible through the vibration of the moving carriage.
Upon arrival, once the device reconnects to station Wi-Fi, the session syncs invisibly. No menus, no errors, just continuity.