GTrace vs CompassPin

Track day or mountain road, every G you used stays on record. GTrace turns your iPhone into a real G-meter. It draws the lateral and longitudinal G-forces from your cornering, braking and throttle as a live trace, then lets you replay the run against the map, your footage or the graphs. One-time purchase. No subscription, no in-app purchases. WHILE YOU DRIVE - Live G-G diagram, lateral and longitudinal G shown together - Trailing trace, with peak lateral and longitudinal G held on screen - Jerk shown as a crosshair, so you can see how smoothly you transfer load - Speed readout, switchable between km/h and mph - Audible alert when you exceed your chosen G threshold - Comfort and Sport modes with separate display ranges for street and track - Three display layouts: standard, info + speed, and video preview - Phone holder mode, so a vertically mounted phone still reads longitudinal G correctly MEASUREMENT - Gravity component removed to isolate true vehicle acceleration - 2nd-order Butterworth IIR low-pass filter with adjustable cutoff frequency - Configurable sampling rate - Axis inversion, so mounting orientation doesn't matter AFTER THE RUN - G-G heat map showing which part of the friction circle you actually used, so you can see the balance between cornering, braking and acceleration at a glance - Synced playback: G-G + map, G-G + video, G-G + acceleration graph, or map + graph, at adjustable playback speed - Time-series graphs for longitudinal G, lateral G, longitudinal jerk, lateral jerk and speed - GPS trace drawn on a map, with top and average speed RECORD AND SHARE - Voice recording, synced to the acceleration data for commentary and notes - Video recording with audio, played back with the G-G trace overlaid - CSV export for spreadsheets or your own analysis tools - Native binary format (.ggx) import and export, for backups and moving data between devices WHO IT'S FOR - Track day, sports driving and time attack enthusiasts - Drivers working on their technique on mountain roads - Anyone chasing smoother, more passenger-friendly load transfer - Motorsport competitors who want their practice data kept - Anyone who wants their car's behaviour in numbers English and Japanese. iPhone only, iOS 15.6 or later. Note: measurements use the iPhone's built-in accelerometer and gyroscope. Mount the phone firmly in the vehicle for accurate readings. Note: GPS trace and speed recording require location permission. Note: this app does not include lap timing.

CompassPin helps you orient yourself toward a destination with a calm, minimal interface. Choose where you want to go, then use a live directional view to turn, align, and move with confidence. CompassPin reduces clutter and keeps the experience focused on one thing: helping you face the right direction. Features: • Live directional guidance toward your selected destination • Clear visual pointer and ribbon feedback as you align • Map view that keeps your position and destination easy to understand • Simple, distraction-light interface for walking, exploring, and finding your way • Fast foreground guidance without a crowded navigation screen CompassPin is designed for people who want a cleaner sense of direction without the noise of a traditional map-heavy experience. Privacy: CompassPin uses your location while the app is open to show your position and guide you toward your selected destination. CompassPin is not an emergency service and should be used with awareness of your surroundings.