How to use:
1. Walk/drive your route — phone records GPS every 1s.
2. RSSI estimated from Network Information API (real signal where supported).
3. Tap Export → GPX file → email to yourself or AirDrop to your laptop.
4. In CellScope Pro: Data → Import Drive Test (CSV/KML/GPX).

Install as app: Tap Share button (iOS) → "Add to Home Screen" or "Install" (Android).