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PerfExpert - Car Dyno HP Test
PerfExpert - Car Dyno HP Test Vs. Race Buddy: Lap & Drag Timer

PerfExpert - Car Dyno HP Test 與 Race Buddy: Lap & Drag Timer 使用情況與統計

Know your car's true performance. Turn your smartphone into a professional dyno. Measure the real horsepower and torque of your engine — within 2% of a chassis dynamometer — and time your car's acceleration. No OBD adapter, no cables, no expensive dyno sessions. Just mount your phone, accelerate, and get instant results. Test and compare performance upgrades. Whether you're verifying an ECU remap, testing a new exhaust, or tracking the effect of a chiptuning session, PerfExpert gives you objective, independent data you can trust. HOW IT WORKS 1. Create your car profile Enter your vehicle's weight, tire sizes, and gear ratios. Not sure about a spec? The app guides you through every step. 2. Mount your phone & accelerate Secure your phone in the car — no connection needed. Find a flat, straight road. Accelerate in one gear from low RPM to redline. That's it. 3. Get instant results Power and torque curves appear immediately, just like on a real chassis dynamometer. Compare runs, track your modifications, and share results. MEASUREMENT MODES Dyno — Full power & torque curves vs. engine RPM. Advanced drivetrain loss model, rev limiter detection, and correction standards (DIN, SAE, JIS, CEE, ISO). Results as detailed as a professional chassis dyno. Timed Run — Measure acceleration from a standing start. Speed intervals: 0-100, 100-200, 80-180, 60-160 km/h — 0-60, 60-120, 50-110, 40-100 mph. Distance: quarter mile, eighth mile (with trap speed), 60 ft. Max speed and peak acceleration on every run. KEY FEATURES - 2% accuracy compared to professional chassis dynamometers - No OBD adapter or connection to your car required - Works with your phone's built-in sensors - External GPS available as an in-app option for pro-level precision: RaceBox Mini, Mini S, Micro (rolling start dyno, free phone mounting) - Power correction norms: DIN, SAE, JIS, CEE, ISO — using real-time atmospheric pressure, temperature, and humidity - Interactive charts: pinch to zoom, tap for exact values - Export results as PNG image or shareable web link - Custom units: HP, CV, kW for power — Nm, ft-lb, mkg for torque — km/h, mph for speed PERFEXPERT PRO (optional subscription) - Custom logo on your results - Cloud backup of your results - CSV data export WHO USES PERFEXPERT? - Car enthusiasts who want to know their real HP and torque - Tuners and mechanics verifying ECU remaps, chiptuning, intake, exhaust, or turbo upgrades - Owners comparing before/after results of any modification - Drivers timing their 0-60 mph or 0-100 km/h acceleration - Anyone curious about their car's true performance IMPORTANT NOTES - Dyno mode requires a manual gearbox or an automatic with manual/sequential mode - For best results, use a flat, straight, horizontal road with no traffic - External GPS (available as an in-app option) unlocks additional features: rolling start dyno (no need to stop before measuring) and free phone orientation FAQ and support: https://www.perfexpert-app.com/faq Join the PerfExpert community: https://www.facebook.com/groups/perfexpert/ Privacy Policy: https://www.perfexpert-app.com/privacy-policy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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Race Buddy: Lap & Drag Timer

For track day drivers, drag strip racers and tuners. Pair RaceBuddy ONE, RaceBox, Dragy or RaceHF — measure 0-60 mph, quarter mile, sector times, lap deltas, and real-world horsepower in one app. Used at 1,000+ sanctioned tracks worldwide by track day enthusiasts, autocross drivers, drag strip racers, motorcycle riders and performance tuners. Designed for closed-course use only — sanctioned circuits, drag strips, autocross courses. Not for road or street use. POWER & TORQUE — REAL-WORLD DYNO • Measure horsepower and torque from a single clean GPS pull • Smart Garage AI fills drivetrain, weight, gear ratios and frontal area • Compare power gains across mods, tunes and fuel • No chassis dyno needed LAP TIMER & TRACK DAY COMPANION • Professional GPS lap timing with sector splits • Automatic circuit detection at 1,000+ tracks worldwide • Live delta timing — real-time lap improvements • Ideal lap calculation from your best sectors • Track maps with racing line analysis • Compare laps against your best or any public Leaderboard lap DRAG STRIP & ACCELERATION • 0-60 mph, 0-100 km/h, 1/8 mile, 1/4 mile, 1/2 mile times • Predicted 1/4 mile ET — projected time live, mid-run • 60-foot rollout, slope correction, density altitude compensation • DIFF time vs your selected reference run • Compare runs side-by-side • Rolling acceleration from any speed • Braking performance measurement • Real-time speed display up to 25 Hz GPS accuracy • G-force meter for launch and braking analysis VIDEO & DATA OVERLAY • HD recording with synchronized telemetry • Green screen export for post-production • Overlay onto your existing video — Drag & Laptimer • Custom overlay layouts (PRO) • Up to 4K resolution and portrait orientation (PRO) • Picture-in-picture track map • Speed, G-forces, lap times, temperatures, RPM-derived data • Story and Post cards for Instagram and TikTok ADVANCED TELEMETRY & ANALYSIS • Density altitude for accurate tuning • Weather and temperature tracking • Detailed session history and statistics • VBO and CSV export • Telemetry import from other devices VEHICLE MANAGEMENT • Rich car profiles with variant data • AI fills unknown specs (gears, weights, drivetrain, more) • DCT, CVT, manual and automatic transmissions supported • Track multiple vehicles with per-car performance history • Power-to-weight calculations SUPPORTED GPS DEVICES (Bluetooth pairing required) • RaceBuddy ONE — connect and use for free • Dragy, Dragy Pro • RaceBox Mini, Mini S, Micro • RaceBox.cc • RaceHF External GPS device required. The phone's GPS is not supported — accurate timing needs a high-frequency, low-latency receiver. WHAT'S FREE vs PRO Free: connect RaceBuddy ONE, full lap timing, full drag timing (0-100, 1/4 mile, 60-foot, etc.), session history, VBO export, 1080p landscape video overlay export. PRO unlocks: connect any third-party GPS device, Power & Torque measurement, DIFF time, Compare Runs, Compare Laps, custom branding, custom overlay layouts, 2K and 4K export, portrait orientation, Picture-in-Picture, front-camera dual recording, custom track creation, premium support. PRO is available Monthly, Yearly (with 7-day free trial), or as a one-time Lifetime purchase. PERFECT FOR • Track day enthusiasts • Autocross and time attack drivers • Drag strip racers • Performance tuners and dyno operators • Driving instructors and students • Motorcycle riders Disclaimer: For closed-course and track use only. Always prioritize safety. Not intended for street racing or high-risk driving. Drive responsibly and obey all traffic laws. RaceBuddy uses Apple's standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/