FieldGauge is an offline-first engineer toolkit for phones. Measure, log and convert on device — without sending sensor data to the cloud. Use illuminance and exposure helpers (lux, EV100, shutter/aperture/ISO), level, slope and compass, a vibration analyzer, sound and frequency tools, environment sensors when fitted, on-device OCR for meters and nameplates, plus a screen ruler and engineering unit converter. Sensors are checked at runtime; missing hardware is marked as not fitted. Export a local CSV measurement log when you choose. Phone sensors vary by model and are not certified instruments — calibrate against a traceable reference before professional, regulatory or safety-critical use. Free with optional ads; a one-time purchase can remove them.
Key Features
Measure on device
Illuminance and exposure, level and compass, vibration analysis, sound tools, and environment readings when your hardware supports them.
AI instrument reader
On-device OCR for meters, labels and nameplates — read values without uploading photos to the cloud.
Field-ready workflow
Works offline for measurement tools, logs locally with CSV export you control, and shows which sensors are ready or not fitted.
Calibrate with care
Phone sensors vary by model and are for reference only. Use a traceable reference before professional or safety-critical work.
