Mobile Diagnostics — Advanced

Online state, Connection API (effectiveType, downlink), DNS/latency by image fetch and a small download throughput test. For more accurate throughput provide a large test file on an HTTPS server.

Battery charge level, charging status, and estimated charging time (where supported).

Front/back capture, resolution report, try torch toggling (if supported via ImageCapture), and show captured photos (downloadable).

Record a short audio clip, playback, and measure live mic levels with an analyser. Also a generated speaker tone test.

Detect whether a platform authenticator (TouchID/FaceID/Android biometrics) is available and attempt a client-only create/get flow. Note: for production you need a server-provided challenge and HTTPS.

Request a Bluetooth device (requires HTTPS and user gesture). Will try to read advertised services and GATT info where permitted.

Attempt WebUSB request (if supported) and WebNFC probe. Most phones restrict these (WebNFC on Android Chrome, WebUSB limited).

Tries DeviceMotion / DeviceOrientation and Generic Sensor API (Accelerometer, Magnetometer) where available. iOS may require a permission prompt.

Tap with multiple fingers; a heatmap saves touch positions. Clearable dots for manual pass/fail. Shows pressure (force) when available.

Triggers vibration patterns. On devices with advanced haptics, effects may vary. User confirmation required.