# FastTrack — Complete Reference > FastTrack is a free GPS-based vehicle acceleration timer and car enthusiast platform available on iOS and the web at fasttrackapp.biz. Built by FastTrack Rides, Inc. ## What is FastTrack? FastTrack is a GPS-based acceleration timer app for iOS that measures vehicle performance using your iPhone's built-in GPS and accelerometer. It tracks 0-60 mph, 0-100 mph, quarter-mile, and half-mile times with ±0.05–0.1 second precision — comparable to dedicated timing devices like Dragy and RaceBox. Beyond timing, FastTrack is a complete car enthusiast platform with a vehicle garage for tracking modifications, a peer-to-peer parts marketplace, social community feed, vehicle groups, direct messaging, global leaderboards, and real-time multiplayer drive sessions. FastTrack is completely free to download and use. All features — timing, garage, community, leaderboards, groups, and messaging — are included at no cost. ## GPS Timing Accuracy ### How does FastTrack compare to Dragy and RaceBox? FastTrack uses the iPhone's 100Hz accelerometer with 3D gravity calibration for launch detection (approximately 30ms response time), combined with GPS Doppler-derived speed and linear interpolation — the same techniques used by dedicated timing devices. For 0-60 mph times, FastTrack achieves accuracy within 0.05 to 0.1 seconds of dedicated devices. FastTrack actually detects launch faster than the standard Dragy, which lacks an accelerometer and relies on GPS speed alone (approximately 100ms latency). Where dedicated devices maintain an advantage is in run-to-run consistency and distance-based metrics like quarter-mile timing, due to their purpose-tuned antennas and roof-mounted placement. #### Timing Methods FastTrack implements several professional-grade timing techniques: - 100Hz accelerometer launch detection with 3D gravity vector calibration - 300ms settle period after launch detection to prevent false triggers from button taps - GPS timestamps for milestone recording (not wall-clock time), eliminating processing lag - Linear interpolation between GPS samples to pinpoint threshold crossings with sub-sample precision - Doppler-derived speed from GPS rather than position differentiation - Exponential moving average smoothing to reject GPS noise while maintaining responsiveness - Accuracy-gated recording that rejects poor GPS points during active runs - Jump detection that discards impossible position changes from GPS glitches #### Hardware Comparison | Spec | Dragy Standard | Dragy Pro | RaceBox Mini | FastTrack (iPhone) | |------|:-:|:-:|:-:|:-:| | GPS Update Rate | 10Hz | 25Hz | 25Hz | ~10Hz | | Satellite Systems | GPS, GLONASS | GPS, GLONASS, Galileo, BeiDou | GPS, GLONASS, Galileo, BeiDou | GPS, GLONASS | | GPS Bands | Single (L1) | Dual-band (L1+L5) | Single (L1) | Dual-band on iPhone 15+ | | Accelerometer | None | 6-axis IMU | 1kHz IMU | 100Hz accelerometer | | Dedicated Antenna | Yes | Yes (dual-band tuned) | Yes (20dB gain) | No (shared internal) | | Claimed Accuracy | ±0.03s | ±0.01s | ±0.01s | ±0.05-0.1s | | Price | ~$150 | ~$250 | ~$200 | Free | #### Accuracy Comparison | Metric | Dragy Standard | Dragy Pro / RaceBox | FastTrack | |--------|:-:|:-:|:-:| | Launch detection latency | ~100ms | ~10-50ms | ~30ms | | 0-60 mph accuracy | ±0.03s | ±0.01-0.02s | ±0.05-0.1s | | Quarter mile ET | ±0.03s | ±0.02s | ±0.1-0.15s | | Trap speed | ±0.5 mph | ±0.3 mph | ±1-2 mph | | Run-to-run consistency | ±0.02s | ±0.01s | ±0.05-0.1s | ### What timing modes are available? FastTrack offers four driving modes: **Acceleration Mode** — For focused single runs (0-60, 0-100, quarter-mile, half-mile, top speed, custom speed ranges). The timer starts automatically when acceleration is detected and stops at the target milestone. No button press required. **Drive Mode** — Records full drives in the background, capturing route, top speed, and performance events throughout the session. Ideal for road trips and extended sessions. **Rolling Mode** — Rolling-start speed tests from 60 mph and up. GPS auto-detects threshold crossing. Tracks 60-130, 60-100, 100-150, plus granular 10 mph splits and peak G-force. **Drive with Friends (Multiplayer)** — Real-time multiplayer sessions with join codes. Four sub-modes: Cruise, Race, Rolling, and Open. Live GPS tracking, leaderboard, and podium rankings. ### Do I need extra hardware? No. FastTrack runs entirely on the iPhone's built-in GPS and accelerometer. No external devices, OBD adapters, or Bluetooth accessories are required. A phone mount is recommended for safety. ### Best Practices for Timing Getting the most accurate times from FastTrack comes down to optimizing your GPS signal: - Place your phone on the dashboard or windshield mount with a clear view of the sky - Wait for high GPS accuracy before starting. FastTrack's accuracy indicator shows when conditions are good - Run on flat, straight roads for the most comparable results to published times - Do multiple runs and use your best consistent time (standard practice even with dedicated devices) - Avoid urban canyons where tall buildings cause GPS multipath errors ## Vehicle Garage ### What can I track in my garage? The garage stores complete vehicle profiles including year, make, model, and trim for every car in your collection. Each vehicle gets its own profile with run history and modification log. ### How does mod tracking work? FastTrack tracks modifications across 10 categories with 75+ modification types: - Engine - Forced Induction - Fuel & Ignition - Cooling - Drivetrain - Suspension & Chassis - Wheels, Tires & Brakes - Aero & Exterior - Interior & Weight - Electronics Each modification is logged with a date and notes, so you can compare run history before and after upgrades to measure the exact performance impact of each change. ### How many vehicles can I add? There is no limit. Add as many vehicles as you want and switch between them before any run with a single tap. ### Performance Tracking Before-and-after timing data is automatically correlated with your mod list. When you log a modification and then record a run, that run is tagged with your current garage configuration. This lets you measure the exact real-world performance impact of each upgrade. ## Parts Marketplace ### What is the FastTrack Marketplace? The FastTrack Marketplace is a peer-to-peer auto parts marketplace built into the platform. Users can list parts for sale, post Want to Buy (WTB) requests, browse listings from other enthusiasts, and make offers — all with secure Stripe payment processing. ### What are the fees? FastTrack has the lowest fees of any auto parts marketplace: - Buyer fee: 3% - Seller fee: 6% - Stripe processing fee: split 50/50 between buyer and seller For comparison, eBay charges sellers up to 13.25% + $0.30 per sale, and Facebook Marketplace charges sellers 10% or a flat $1. ### How do offers work? Buyers can send offers on any listing with an optional message. Sellers can accept, decline, or counter. Up to 5 rounds of negotiation are allowed, with a 48-hour expiry on each offer. ### What payment methods are supported? All payments are processed securely through Stripe. Sellers set up a Stripe Connect account and receive payouts directly to their bank. Funds are held for 3 days after delivery confirmation before payout. ### Vehicle-Matched Search The "Fits My Vehicle" filter instantly shows listings that match the cars in your garage. Search by make, model, year, category, condition, and price range. Save searches and bookmark listings for later. ### Seller Profiles & Reviews Every seller has a public profile with their rating, review count, and active listings. Leave reviews after completed purchases to help the community. Verified badges for trusted sellers. ### Shipping & Local Pickup Sellers choose shipping, local pickup, or both. Buyers get tracking numbers and carrier info for shipped items. Confirm receipt when your part arrives, or confirm handoff for local pickups. ### Want to Buy Posts Post what you're looking for and let sellers know they have interested buyers. Great for hard-to-find pieces and discontinued parts. Sellers can respond with offers on WTB posts. ## Community Features ### What can I share on the social feed? Share any completed acceleration run or drive session to the community feed. Posts include your tagged vehicle, GPS-verified timing data, and optional photos or videos (up to 7 media items, videos up to 15 seconds). ### How do privacy controls work? Every post can be set to public or friends-only. Your garage, profile, and run history are private by default. Only accepted friends can see friends-only content. Private group posts are visible only to group members. ### Social Features - Friend system with friend requests and acceptance - Like and comment on posts from other enthusiasts - Threaded comments for discussions - Message other users directly with direct messaging - Mention other users in posts and comments - Tag vehicles in posts for easy discovery ### Explore Feed The public community feed showcases GPS-verified runs, builds, and photos from car enthusiasts worldwide. Discover new builds, compare performance, and find inspiration for your own projects. ## Groups ### What are Groups? Groups are communities within FastTrack. Two types exist: **Auto Groups** — Created automatically for every vehicle make and model. Add a car to your garage and you automatically join its auto group. These are great for finding other owners of the same vehicle to share performance data and build ideas. **Custom Groups** — Created by any user for any purpose (local meetups, build projects, track day crews, regional enthusiast clubs). Full control over name, description, visibility (public or private), and membership with moderation tools. ### Group Features - Threaded discussions for in-depth conversations - Group feed for sharing builds and runs - Moderation tools for group admins - Private groups for closed communities - Public groups for discovery - Membership management and invitations ## Leaderboards ### How do leaderboards work? Leaderboards rank all FastTrack users by their best GPS-verified times. Categories include: - 0-60 mph - 0-100 mph - Quarter-mile - Half-mile - Rolling categories (60-130, 60-100, 100-150) Rankings available both overall and by vehicle make. Only runs recorded through the app count — no manual entries. A friends-only view is also available for competing with your crew. ### Leaderboard Mechanics All times are GPS-verified using the app's timing engine. Users cannot manually enter times or fake results. The leaderboard updates in real-time as new runs are recorded. ## Multiplayer Drive Sessions ### Drive with Friends Create or join real-time drive sessions with friends. Share a 6-character join code and invite others to join. The app shows live GPS locations of all participants, real-time speed comparisons, and podium rankings. ### Session Modes **Cruise Mode** — Casual driving without competition. Just track your friends' locations and speeds. **Race Mode** — Competitive acceleration runs with automatic timing. Compare 0-60, 0-100, and other metrics. **Rolling Mode** — Rolling-start competition from a target speed. **Open Mode** — Free-form sessions with custom rules set by the session creator. ## Platform Details ### What platforms is FastTrack available on? FastTrack is available on iOS (iPhone) and the web at fasttrackapp.biz. An Android version is not currently available. ### Is FastTrack free? Yes. FastTrack is completely free to download and use. All timing modes, garage management, community features, leaderboards, groups, messaging, and the marketplace are included at no cost. ### Who makes FastTrack? FastTrack is made by FastTrack Rides, Inc. ### Contact & Support For support, feedback, or partnership inquiries, visit https://fasttrackapp.biz/contact ### Where can I download FastTrack? Download FastTrack free from the iOS App Store: https://apps.apple.com/us/app/fasttrack-rides/id6758738999 ## Security & Privacy ### Privacy Controls - Private garage by default — other users cannot see your vehicle list - Posts can be set to public or friends-only - Direct messaging control — you can block and report users - Location data is only used for timing — not shared with third parties - Review our full privacy policy at https://fasttrackapp.biz/privacy ### Data Protection - All communication is encrypted - Passwords are securely hashed - Payment information is processed through Stripe (PCI compliant) - Location data for timing is stored locally on device before upload - You can delete your account and all associated data at any time ## Guides & Knowledge Base ### Timing Accuracy [FastTrack Timing Accuracy vs Dragy & RaceBox](https://fasttrackapp.biz/guides/fasttrack-timing-accuracy) — Technical comparison of GPS timing accuracy between FastTrack, Dragy, and RaceBox dedicated devices. FastTrack achieves 90-95% accuracy of dedicated hardware with faster launch detection (30ms vs 100ms for standard Dragy). Key findings: - FastTrack's 30ms launch detection is faster than standard Dragy's 100ms - Quarter mile accuracy is approximately 0.1-0.15 seconds (Dragy Pro: 0.02s) - Run-to-run consistency is within ±0.05-0.1 seconds - iPhone 15 and newer models support dual-band GPS for improved accuracy ### Performance Modifications [Best Car Mods for Horsepower](https://fasttrackapp.biz/guides/best-mods-for-horsepower) — Data-driven guide comparing real-world horsepower gains from modifications. Coverage includes: - Cold air intake: 5-15 whp (naturally aspirated), 10-25 whp (turbocharged) - Cat-back exhaust: 5-20 whp (NA), 15-30 whp (turbo with downpipe + tune) - ECU tune/flash: 10-25 whp (NA), 30-80 whp (turbo) - Headers and downpipes: 15-30 whp (NA headers), 15-40 whp (turbo downpipe) - Forced induction (turbo/supercharger): 50-150+ whp How to track mods in FastTrack garage to measure performance improvements with before-and-after data. ### Timing Methods [How to Measure Your Car's 0-60 Time](https://fasttrackapp.biz/guides/how-to-measure-0-60-time) — Methods and best practices for accurate 0-60 mph measurement using GPS and acceleration data. Topics covered: - Phone placement and GPS signal optimization - Driving surface considerations - Consistency across multiple runs - Using FastTrack's built-in timing engine - Comparison to other timing methods ### Acceleration Brackets [Quarter Mile Times Explained](https://fasttrackapp.biz/guides/quarter-mile-time-explained) — Understanding quarter mile time brackets, what constitutes a good time, and how to optimize for distance-based runs. Information on: - Quarter mile time ranges by vehicle class - What makes a competitive time - Factors affecting quarter mile performance - How to prepare for optimal results ### Performance Tracking Apps [Best Car Performance Tracking Apps 2026](https://fasttrackapp.biz/guides/car-performance-tracking-apps-2026) — Comparison of FastTrack, Dragy, RaceBox, and RaceChrono apps and dedicated devices. Covers: - Feature comparison across platforms - Accuracy and precision metrics - Pricing and subscription costs - User interface and ease of use - Community features and social integration ## Vehicle Database ### Browse Vehicles [Vehicle Directory](https://fasttrackapp.biz/vehicles/browse) — Browse vehicles by make and model with real performance data from the FastTrack community. See average times, best times, and modification trends for any vehicle. ### Performance Rankings [Performance Index](https://fasttrackapp.biz/performance) — Performance rankings organized by category (0-60, 0-100, quarter-mile, half-mile, rolling) and bracket (vehicle class). All rankings are based on verified GPS times from community members. ## Community Features ### Explore Feed [Community Feed](https://fasttrackapp.biz/explore) — The public feed showcases GPS-verified runs, builds, and photos from car enthusiasts worldwide. Discover builds, compare performance, and find inspiration. ### Group Discovery [Browse Groups](https://fasttrackapp.biz/groups/browse) — Discover and join car enthusiast groups organized by vehicle model, location, or interest. Find communities for your car or start your own group. ## Terms & Policies ### Community Standards [Community Guidelines](https://fasttrackapp.biz/community-guidelines) — Content standards and community behavior expectations. All members are expected to follow these guidelines to maintain a respectful community. Key principles: - No harassment, bullying, or hate speech - No illegal activity promotion - No spam or self-promotion without community permission - Respectful disagreement and discussion encouraged - Moderation and reporting tools available ### Legal [Terms of Service](https://fasttrackapp.biz/terms) — Full terms for using FastTrack, including user rights, responsibilities, and platform policies. [Privacy Policy](https://fasttrackapp.biz/privacy) — How FastTrack collects, uses, and protects user data and location information. Details on data retention, sharing, and user rights. ## FAQ ### Can I use FastTrack without the iPhone app? Yes. FastTrack has a full web version at fasttrackapp.biz where you can view leaderboards, explore the community feed, browse the marketplace, and manage your profile. Timing requires the iPhone app with GPS access. ### How accurate are the leaderboards? All leaderboard entries are GPS-verified using FastTrack's timing engine. Times cannot be manually entered or faked. The leaderboards represent real-world acceleration data from actual community members. ### Can I sell my own parts on the marketplace? Yes. Simply set up a seller account, connect your Stripe account, and start listing parts. You control pricing, descriptions, and photos. When you make a sale, funds are held for 3 days after delivery confirmation, then transferred to your bank account. ### What happens if there's a dispute over a marketplace sale? The platform has a dispute resolution system. If a buyer reports an issue with a purchase, both parties can provide evidence. FastTrack admins review disputes and can issue refunds or take other actions as appropriate. ### Can I delete my account? Yes. You can delete your account and all associated data at any time from the Settings page. This action cannot be undone. ### Is my location data private? Your GPS location is only used for timing runs and multiplayer sessions. Precise location is not shared in public posts or with other users. You have full control over privacy settings for your posts and profile. ### Can I make my posts private? Yes. Every post can be set to public or friends-only. Only accepted friends can see friends-only content. Garage and profile visibility can also be controlled in your privacy settings. ## Technical Details ### iPhone Requirements FastTrack requires iOS 13 or later. GPS accuracy improves on iPhone 15 and newer models which support dual-band GPS (L1+L5). ### Internet Requirements Internet connection is required for most features (community, leaderboards, marketplace). Timing can work with cellular data, but WiFi is recommended for reliable cloud synchronization. ### Data Usage Typical data usage per timing run is less than 1MB. Community feed browsing and marketplace browsing use normal web data. Video uploads will use more data depending on video duration. ### Cloud Synchronization All data is automatically synced to the cloud. Your runs, garage, and profile are accessible from both the app and the web. Changes sync in real-time across devices.