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APPYONDA-GEOFENCING

Geofencing & Preemptive Caching

Blake Carter|Version v3.0.0|CANONICAL

Bounding-Box Preemptive Caching Strategy

To survive rural blackspots where cellular coverage drops, yonda-app does not query stories point-by-point.

┌────────────────────────────────────────────────────────┐ │ Current GPS Grid │ │ │ │ [POI 1: Loaded] [POI 2: Cached] │ │ ▲ ▲ │ │ │ │ │ │ 🚗 Vehicle ────────► Direction of Travel │ │ │ │ │ [POI 3: Cached] [POI 4: Pre-fetching...] │ └────────────────────────────────────────────────────────┘
  1. Velocity & Heading Projection: Predicts the next 30-50 km travel corridor.
  2. Batch Fetch: Downloads all POI metadata and lightweight text into local SQLite/Isar database.
  3. Audio Pre-fetch: Downloads upcoming ElevenLabs MP3 voice chunks before cellular connectivity drops below 2G speeds.