TrackDay for iPhone vs GPS Lap Timer

The track day lap-timer by track day riders, for track day riders (and drivers!) The customer feedback about racing leathers interfering with the GPS signal is correct! You *must* mount your iPhone externally to capture a good GPS signal while *riding* at the track. Details are provided on the GPS Accuracy screen accessed via the Support & Feedback menu selection. - Capture GPS data, then automatically compute lap times for each of your sessions on the track. - Download our tracks ($0.99 each), or (with $2.99 in-app purchase) have the app "learn" the track from your session data. - With Track view, analyze the raceline before you head out onto the track; back in the paddock, analyze your session results. - With the Dashboard view, lap times and sector times are displayed in real-time; back in the paddock, analyze lap and sector times across sessions. - 270+ track configurations around the world and counting! Don't see the track you're looking for? Tell us and we'll add it!! Here are just a few of the tracks we feature: Anglesey International Aragon Arizona Motorsports Park Arroyo Seco Raceway Auto Club Speedway Autobahn Country Club Autodromo Fazenda Capuava Autodromo Jose Carlos Pace (Interlagos) BIR Barbagallo Raceway Barber Motorsports Park Baskerville Raceway Bedford Autodrome Blackhawk Farms Raceway Brands Hatch Brno Circuit Bugatti Circuit Buttonwillow Raceway Cadwell Park Carolina Motorsports Park Castle Combe Circuit Charlotte Motor Speedway Road Course Chuckwalla Valley Raceway Circuit Mont-Tremblant Circuit de Catalunya Circuit de Valencia Circuit de la Sarthe Circuit of the Americas Circuito Estoril Circuito de Jerez Daytona International Speedway Donington Park Dubai Autodrome Eagles Canyon Raceway Firebird International Raceway Gateway Motorsports Park GingerMan Raceway Goodwood Circuit Grattan Raceway Harris Hill Road Heartland Park Topeka Homestead-Miami Speedway Road Course Honda Grand Prix of St. Petersburg Iowa Speedway Road Course Isle of Man TT Jennings GP Kirkistown Circuit Kyalami Grand Prix Circuit Las Vegas Motor Speedway Lime Rock Park Losail International Circuit MSR Houston Mallory Park Superbike Circuit Manfeild Autocourse Mazda Raceway Laguna Seca Mid-America Motorplex Mid-Ohio Sports Car Course Miller Motorsports Park Misano World Circuit Monticello Motor Club Motorsport Park Hastings MotorSports Ranch Cresson Mount Panorama Circuit Bathurst Mugello Circuit NCCAR / NCBike NJMP NOLA Motorsports Park Nashville Superspeedway Road Course Nelson Ledges Road Course New Hampshire Motor Speedway Road Course Nuerburgring Nordschleife and F1 Circuit Oulton Park Circuit Pacific Raceway Road Course Palm Beach International Raceway Phakisa Freeway F1 Track Phillip Island Grand Prix Circuit PittRace (BeaveRun) North Track Pocono Raceway Portland International Raceway Pukekohe Park Raceway Putnam Park Road Course QLD Raceway Red Star Raceway Road America Road Atlanta Rockingham Motor Speedway Road Course Roebling Road Raceway Ruapuna Park Grand Prix Circuit Sachsenring Circuit Sebring International Raceway Sentul International Circuit Sepang International Circuit Serres Racing Circuit Silverstone Circuit Snetterton Sonoma Raceway Spring Mountain 2.2 Summit Point Motorsports Park Suzuka Circuit Sydney Motorsports Park Symmons Plains Raceway TT Circuit Assen Talladega Gran Prix Raceway Taupo Motorsport Park Teretonga Park Raceway Texas World Speedway Thunderhill Raceway Park Timaru International Motor Raceway (Levels) Twin Ring Motegi VIR Vereeniging Kart Circuit Wakefield Park Watkins Glen International Willow Springs Winton Motor Raceway Yas Marina Circuit Zwartkops Raceway and Kart Circuit Continued use of GPS running in the background can dramatically decrease battery life. All third-party names mentioned by the FTLapps website and TrackDay apps are trademarks of their respective owners and subject to applicable laws.

• "GPS Lap Timer" is a lap timer app for racing circuits that utilizes the iPhone's GPS function. • Easily and accurately measure lap times and sector times using only your iPhone. No external GPS receiver is required. • The accuracy of a GPS lap timer is not determined solely by the GPS update frequency. This app achieves highly accurate lap time measurement through its unique measurement logic. • Approximately 10,000 measured lap times are saved and can be viewed and shared. • Enjoy a fulfilling racing life with this app! (How to use) Please see "https://gpslaptimer.blogspot.com/2026/08/gps-lap-timer-free-ios-app.html”. You can also access it from “Settings” → “User Guide” in the app. (Measurable circuits) Planned to be added. Please let us know if you have any requests. Please also report any bugs or issues. (Australia) Sydney Motorsport Park (Brabham, Gardner GP, Druitt North) Sydney Motorsport Park Amaroo South (France) Circuit Paul Ricard (Gernany) Nürburgring Nordschleife Nürburgring Nordschleife (BTG) (Japan) Please see “https://gpslaptimer.blogspot.com/2026/08/list-of-japanese-circuits.html”. (Malaysia) Sepang International Circuit (Taiwan) Lihpao G2 Circuit (Thailand) Chang International Circuit (United Kingdom) Oulton Park Circuit Silverstone International Circuit Silverstone Grand Prix Circuit Silverstone Stowe Circuit Silverstone National Circuit Donington Park Circuit Brands Hatch GP Circuit Brands Hatch Indy Circuit (United States) Blackhawk Farms Raceway BRP Kart CCW1 BRP Kart CW1 BRP Race CCW1 BRP Race CW1 BRP Race CCW2 BRP Race CW2 BRP The Circuit CCW (Buttonwillow Raceway Park) BRP The Circuit CW (Buttonwillow Raceway Park) Laguna Seca Road America Sebring Raceway GP Road Course Sonoma Raceway Summit Point Motorsports Park (Main) Summit Point (Jefferson Circuit CCW) Summit Point (Shenandoah Circuit CCW) VIR Grand∙Full Course VIR North Course VIR South Course VIR Patriot Course Waterford Hills Road Racing The developer assumes no responsibility for any accident, violation, loss or claims by third parties which may arise from the use of this app. Terms of Use: This application is provided under the Apple Standard End User License Agreement (EULA). https://www.apple.com/legal/internet-services/itunes/dev/stdeula/