NerdTrack vs Sensor Recorder Pro

NerdTrack records your location in a CSV file on your phone. No other data is collected and no data ever leaves your device. Full source is available at https://nerdtrack.org There is no interactive UI. Just grant location permissions, and it will log in the background. To stop logging, remove location permissions or uninstall app. The app uses the SignificantLocation and CLVisit APIs. The accuracy is low but it has very low battery usage. To get your log, open the Files app, and look for locations.csv in the Nerd Track folder. A config file will be created in the app's documents folder the first time it runs. Edit that file to change logging frequency or minimal distance. Force-stop and restart app to reload config. By default, the app records location: - Every 15 minutes, if you have moved more than 300 meters The CSV logs timestamps in the unix epoch format. Use 'dateconv -i %s' to convert it to something more human-readable. Some helper scripts are available at https://nerdtrack.org

Sensor Recorder Pro turns your iPhone into a local, offline multi-sensor data recorder for developers, researchers, robotics, SLAM, AR, and AI workflows. Choose between two capture modes: Standard Mode Record wide, ultra-wide, telephoto, and front cameras Capture up to three RGB camera streams, depending on device capability Record LiDAR depth on supported devices Configure resolution, frame rate, exposure, and focus ARKit Mode Record RGB video with timestamp-aligned 6-DoF camera poses Capture ARKit camera intrinsics and tracking metadata Record scene depth on supported LiDAR devices Designed for trajectory visualization, 3D reconstruction, SLAM, VIO, robotics, and spatial AI research Additional sensor streams include: Accelerometer and gyroscope IMU data Magnetometer and barometer data Device motion, attitude, and gravity Core Location data Microphone audio Each recording session produces structured, timestamped files for post-processing, sensor fusion, trajectory analysis, visual-inertial experiments, computer vision, multimodal learning, and research logs. Key Features Standard multi-camera and ARKit recording modes RGB, LiDAR depth, pose, IMU, motion, location, and audio recording Configurable camera resolution, frame rate, exposure, and focus Timestamped records for multi-sensor alignment Local file export for custom processing pipelines Fully offline recording with no cloud dependency Free version supports up to two minutes per recording session One-time upgrade unlocks unlimited recording length Use Cases Robotics and spatial AI data collection AR, SLAM, and visual-inertial odometry experiments 3D reconstruction and camera trajectory analysis Camera, LiDAR, pose, and IMU synchronization Multimodal sensor logging Teaching, research, and rapid prototyping Privacy Sensor Recorder Pro does not upload recorded data to any server. All recordings remain locally on your device and are managed or exported by you.