Android MVP download

Speed Lens

A phone-only speed measurement app that detects moving targets, warns when the camera is too shaky, and estimates speed from camera timing plus a scale hint or calibrated gates.

Download Android APK How it works

Estimated speed only - not certified for enforcement or safety-critical use. Android may ask you to allow installs from your browser for this MVP sideload.

Auto tracking first, calibrated checks when precision matters.

Speed Lens uses local motion detection, phone stability sensing, known scale, frame timing, and gate crossings. It stays local on the phone and does not require external radar hardware or cloud processing.

Auto track mode

Point at one moving target, enter a rough scene-width scale, and get an estimated speed with confidence and hold-steady warnings.

Live two-gate mode

Place two draggable gate lines over the camera preview, enter the real distance, and let motion crossing produce an estimated speed.

Manual video mode

Import or record a clip, scrub to the crossing frame for Gate A and Gate B, and calculate from timestamps for a reliable MVP fallback.

Local history

Measurements are saved on the device with mode, speed, distance, elapsed time, confidence, FPS, direction, and optional notes.

Automatic when possible, calibrated when needed.

Auto Track gives a fast field estimate. Two-gate and manual video modes remain the better choice when you can measure real points in the scene.

Hold the phone steady.On-device sensors watch for camera movement and reduce confidence when the shot is too shaky.
Let Auto Track find motion.The app follows the moving centroid and estimates speed from frame timestamps plus your scene-width scale hint.
Use gates for cleaner checks.Live mode detects a motion centroid crossing two measured gates; manual mode lets you select the exact frames.
Read the estimate.The app reports mph, km/h, m/s, elapsed time, FPS, direction, and confidence.

Built for useful approximations, not legal claims.

Accuracy depends on calibration, lighting, camera angle, frame rate, tracking quality, rolling shutter, and whether one object crosses both gates cleanly.

  • Auto mode: needs a scene-width scale hint for approximate real-world speed.
  • Best view: perpendicular side-view motion.
  • Best distance: measured real-world gate spacing.
  • Best capture: steady phone, no zoom changes, clear lighting.
  • Best fallback: manual video analysis when live tracking is uncertain.
  • Never use for: enforcement, certification, or safety-critical decisions.

Install the MVP.

Direct APK download for Android testing. Version 0.2.0, signed with a local debug certificate for sideload distribution.

SHA-256: 4b8577e6f5f9e3779130e28f86486ff505573cf4d674ae00750128c3bf84a568

Download APK