Free Athlete Tools
Built by Olympian and Olympic coach Stephen Lambdin, based on sports science research. Use them at the gym, on the mat, or on the road.
Round Timer
Taekwondo match rounds, Fight Rounds, EMOMs and bike sprints, with beeps and voice calls so you never have to look at your phone mid-round.
Open the timerCalculators
Your daily water, protein and caffeine numbers from your bodyweight. Includes a sweat rate test.
Open calculatorsBreathe
A guided breathing pacer to calm down before a match, reset between rounds, or wind down for sleep.
Open BreatheStroop Test
Don't read the word, tap the color. A quick test of how well your brain blocks out distractions.
Take the testJump Height
Measure your vertical jump from a slow-motion video. Your video never leaves your phone.
Measure a jumpTip: open any tool on your phone and choose "Add to Home Screen" so it's one tap away.
Want the numbers built into a real plan?
The Athlete System gives you strength and conditioning programming around your sport, research-backed guides for competition and recovery, and a coach in your corner.