Description
Turn your iPhone into a precision performance instrument.
Magnitude tracks speed, G-forces, acceleration, and lean angle in real time; using GPS+IMU sensor fusion for smooth, accurate readings. Built for cars and motorcycles.
LIVE DASHBOARD
• Circular speedometer (0–240 km/h / 0–150 mph)
• Friction circle G-force visualization
• Motorcycle lean angle gauge (±60°)
• Live map & elevation profile
PERFORMANCE TESTS
• 0–60 / 0–100 timing — fully automatic, no button press needed
• Braking test: 60–0 mph with stopping distance
• Customizable speed ranges
SESSION RECORDING
• Continuous logging of speed, G-forces, GPS & altitude
• Speed-colored route replay map
• Charts: Speed/Time, G-Force, Elevation
• Export as CSV, GPX & PNG
LIVE ACTIVITY & DYNAMIC ISLAND
• Current speed on your lock screen
• G-force or lean angle in the Dynamic Island
PRO FEATURES
• Unlimited sessions
• Motorcycle mode with lean angle gauge
• Braking test & route replay
• Sensor tuning (GPS/IMU balance, up to 60 Hz)
• Full statistics dashboard & personal records
Track day, canyon run, or daily commute. Know exactly how you drive.
What's new (v1.3)
- Standing-start launch tests now begin at first movement, not at 5 km/h. Your 0–100 time is your real 0–100 time.
- Braking tests wait for a confirmed deceleration event, so coasting or lifting off the throttle no longer triggers a false start.
- GPS fixes are no longer rejected because velocity is still being computed — the most common cause of "GPS lost" reports on older iPhones.
- Routes, CSV and GPX exports no longer contain stuck points or straight-line jumps from tunnels and underground parks.
- Zero out the phone-mount offset for accurate motorcycle lean angles.
- Send Feedback directly from Settings → About.
- Live GPS Diagnostic shows fix quality, accuracy and permissions at a glance.
- Imperial units now apply everywhere — Home Screen widget, Live Activity and saved runs.
- Long, high-rate sessions no longer freeze Logs, Stats or session detail when opening them.
- Performance test attempts no longer create extra entries in your ride history.
- Now available in French, Italian and Dutch.