A sprinting app for coaches and athletes

The test plays the audio sequence of a meet start: on your marks, set, then the gun. The hold between set and the gun changes every rep, so you cannot anticipate it, and the app times your reaction to the millisecond with the same high-precision timing your phone uses for game input, so the number on screen is the number a timing system would show. The leaderboard ranks you on your best clean block of five, five consecutive reactions in one session with zero false starts, because one twitch at a meet and you are out.

In practice, treat it like a pre-practice neural primer. A short block before a speed session wakes up the central nervous system and locks in the audio cue you will hear at meets. Use wired headphones or your phone speaker. Bluetooth adds 100 to 300 ms of latency, so the app blocks it. Set a baseline early in your training cycle, then chase your personal best across the season. Every clean block of five trains the discipline of staying patient in set, which is where most false starts happen.

Catch fatigue before you can feel it. The CNS Tap Test is a research-backed way to detect central nervous system fatigue before it shows up on the track. You run three 10-second rapid taps between two zones. We measure total taps, taps per second, and rhythm stability across all three rounds, then roll the results into one daily readiness score: Ready, Maintain, or Recover. The first seven days build your personal baseline so the score reflects your own nervous system. After calibration, the home screen shows a 7-day rolling chart so you can see whether you are climbing toward a peak or running into accumulated fatigue. A daily reminder keeps the habit consistent.

In practice, test at the same time every day, ideally first thing in the morning before caffeine or training. Inconsistent timing pollutes the trend. Watch the direction of the line over several days. A one-day dip after a hard session is normal. Three flat or falling days in a row is a real signal to back off intensity. Pair the readout with how you feel in warm-up: when the tracker says Recover and your warm-up confirms it, that is the day to swap a max-effort session for tempo work. Used this way, the test becomes the cheapest, fastest auto-regulation tool in your training.

A complete max-velocity setup in seconds. The Wickets Calculator builds the whole wicket run: run-in marks, hurdle positions, and cumulative distances, all on your phone and ready to lay out at the track. Two modes cover every athlete you coach. Quick Setup uses the proven Anderson-style profile: pick the athlete category and tier, and the spacing snaps in instantly. Custom Setup drives spacing from the athlete's leg length and a seasonal progression formula, so tall, short and developing athletes get a setup that fits them.

In practice, custom setups are the ideal. Once you have an athlete's leg length on file, the calculator dials in spacing matched to their stride mechanics. That matters most for your tall and short athletes, and for developing sprinters whose stride is changing every few months. Use Quick Setup for group sessions where five athletes of similar level can all run the same wickets back to back, or as a starting point before you take measurements. Save each setup to the athlete's profile so when they show up next Tuesday you are not measuring out a brand new run. As max velocity climbs across the season, update the inputs and watch the spacing stretch with them. A wicket setup that no longer challenges an athlete is a sprint with extra hurdles in the way; the calculator keeps the stimulus matched to the work they are capable of today.

The Speed Profile breaks a 30 m fly into the three numbers that drive sprint speed: velocity, step length, and step frequency, benchmarked against athletes at the same level. Plug in the athlete's leg length, capture step timestamps from the clip, and the app returns each metric alongside the benchmarks for high school, college and elite sprinters. Where most tools stop at a finish-line number, Speed Profile shows you which component of speed is doing the work and which is lagging. An athlete with long strides but below-benchmark frequency has a clear training direction. So does the opposite. Length or frequency, the answer is different for every athlete, and now you have it.

In practice, run a profile early in the season to set the baseline, then re-run after each training block to see what is moving. If the benchmark says the athlete should be hitting 2.20 m steps and they are at 2.05 m, length work has clear runway. If frequency is the lagging metric, switch the emphasis. Save each profile so you can scroll back and see the curve across a season. Pair the inputs with the Kinogram for the same clip and you get the rare combination of qualitative position work and quantitative output sitting next to each other for the same stride.

Block Check grades a sprinter's start from the two frames that decide it: set position and block clearance. Film the athlete from the side in slow motion, then import the clip and scrub to the frames you want graded. A still photo works for set, but block clearance is hard to catch by hand, which is why the slow-motion clip is the better workflow for both. Tap two points to calibrate the ground line, and the app uses Apple's Vision framework to overlay pose landmarks and traffic-light grades on the segments that drive a fast start: back leg angle, front shin angle, hip projection, and shoulder stack at set, plus extension and projection angles at clearance. Green, yellow, and red show at a glance which checkpoints are dialed in and which need a cue. Every check saves to the athlete's profile alongside the annotated frame, so you have a record you can look back on.

In practice, shoot from a perpendicular side angle with the camera level and roughly at hip height. Tilted phones throw off angle measurements, and slow motion (240 fps on most modern phones) gives you the frame precision block clearance demands. Glance over the auto-detected landmarks before saving. The pose layer is good, but a hand-confirmation on knee or hip points takes two seconds and locks in the result. The most powerful workflow is before-and-after: capture the set, give one cue ("more aggressive front-shin angle"), capture again, and save both. The athlete sees the change in their own body in under thirty seconds, which beats a thousand verbal corrections. Over a season, the saved sequence becomes a visible trail of improvement you can show a parent, a college coach, or the athlete on a tough day.