Launchmeter vs Vroomist

Launchmeter turns your iPhone into a performance meter. Find a safe, open space and measure your car's 0-60 mph time with one tap. ACCELERATION TIMING & SPLITS • 3-second countdown, then timing starts automatically when you pull away • Time several runs at once — 0-30, 0-60 and 0-100 mph — and set your own targets • Every split is compared with your personal best: green when faster, red when slower GPS + MOTION-SENSOR FUSION • Speed fuses GPS with your iPhone's accelerometer and gyroscope: accurate GPS gets more weight, the sensors fill the gaps between fixes • The launch moment is detected by the accelerometer, so the start isn't delayed by GPS updates • Hand shakes and road bumps are filtered out, so readings stay steady EVERYTHING AT A GLANCE • Big three-digit speed and a segmented speed bar • Friction circle for longitudinal and lateral G, plus a live G-force trace • Grade meter — tap to zero • Local temperature, humidity and pressure from Apple Weather, plus your iPhone's barometer RUNS & ROUTES SAVED • Speed and G-force traces, splits and route are saved on your iPhone for every run • Drag across the charts to replay any moment • Routes keep recording with the screen locked LAUNCHMETER PRO (OPTIONAL, ONE-TIME PURCHASE) • Weather-corrected times: air density, density altitude and SAE J1349 correction so runs compare fairly across seasons and altitude • Export CSV data and GPX tracks • Share cards with your splits and speed trace • Multiple cars: log and compare runs per car Everything else stays free forever. PRIVACY Your runs stay on your iPhone and are never uploaded. Location is only used to measure speed, record routes and look up local weather. SAFETY Only test on closed courses or where it's safe and legal. Obey traffic laws and never use your phone while driving. Continuous GPS use during a run increases battery drain. Results depend on GPS signal and phone mounting and are for reference.

Vroomist turns your iPhone into a precision vehicle performance analyzer. Connect a RaceBox GPS, Dragy Lite device via Bluetooth for professional-grade measurements, or use your iPhone's built-in GPS. SPRINT MEASUREMENTS Measure acceleration times across any speed range. Built-in presets include 0-60 mph, 60-130 mph, 0-100 km/h, 100 - 200 km/h and dozens more. Create your own custom sprint specs for any speed range you want to test. DRAG RACING Track your 1/8 mile, 1/4 mile, 1/2 mile, and full mile times with trap speed readouts. Add custom distance targets to match your local strip. SLOPE-CORRECTED TIMES Every sprint and drag result includes a slope-corrected time that estimates your flat-ground performance. Vroomist divides each run into segments and corrects each one individually based on its actual elevation change — so hills, dips, and rolling terrain are all accounted for, not just the difference between start and finish altitude. GPS LOGGING Record full GPS sessions to capture every detail of your run — speed, altitude, G-force, and distance — all timestamped and stored locally. REAL-TIME CHARTS Watch your speed, G-force, and altitude update live on a customizable chart. Adjust the time or distance window, tweak G-force smoothing, set dead zones, and zoom in for a closer look. After a run, compare multiple measurements side by side with overlay charts. SHIFT & SPEED ALERTS Set a shift point and Vroomist beeps when it's time to shift. Set a max speed alert and get notified the moment you hit it. Both work in the background while you drive. WEATHER & DENSITY ALTITUDE Vroomist automatically captures temperature, humidity, barometric pressure, and density altitude with every measurement, so you can correlate performance with environmental conditions. SUPPORTED DEVICES • Dragy Lite (up to 25 Hz GPS, selectable 10/20/25 Hz sample rate) • RaceBox Mini (25 Hz GPS) • RaceBox Mini S (25 Hz GPS) • RaceBox Micro (25 Hz GPS) • iPhone Internal GPS (1 Hz) APPLE WATCH See your live speed, device connection status, and measurement results right on your wrist. DATA EXPORT Export individual results or bulk-download your entire measurement history as CSV files in a ZIP archive. Filter by measurement type and time range. Save chart images to your photo library. FULLY CUSTOMIZABLE • Metric or imperial units for speed, temperature, and distance • Custom sprint and drag specifications • Adjustable slow-run filters to automatically discard poor results • Chart draw rate, zoom, smoothing, and visibility toggles • Sound and haptic feedback options • Per-car measurement profiles PRIVACY FIRST Your data stays on your device. Vroomist stores everything locally with no cloud uploads, no accounts.