Nextletic Ready brings the brief-PVT — the reaction-time test used in NASA fatigue research — to your phone. One 3-minute test a day tells athletes and coaches what feeling alone can't.
No wearables, no lab. Just a phone, a flash of light, and a personal baseline that makes every result meaningful.
A 60-second morning survey: sleep, rest, soreness. Quick enough to do before your feet hit the floor.
A 3-minute reaction-time test before training. Tap when the light flashes — that's it. No wearables, no lab.
Your result is compared to your own personal baseline — not someone else's average. Green: in your normal range. Amber: slower than usual. Red: significantly slower than usual.
This is a 30-second taste of the real thing. Tap the screen the instant it turns green — your nervous system does the rest.
Reaction Test
Wait for green.
Tap as fast as you can.
5 rounds.
Every tap captures the speed of your brain's alertness circuit. In the full app, a validated 3-minute brief-PVT collects dozens of reactions, filters out false starts, and compares the result to your own baseline — built in under two weeks of daily testing.
This browser demo is for fun — device timing varies. The app uses calibrated on-device measurement.
Build your personal baseline in under two weeks, then watch your trend: daily reaction time, 7-day and 28-day form lines, all in one chart.
Reaction trend
Last 28 days
Open the dashboard and see your whole roster as a traffic light: who's ready, who's slower than usual, who hasn't tested yet — sorted by urgency.
The app measures. You decide. Nextletic Ready never prescribes training — it gives you an objective signal to coach with.
Team readiness
Today · 07:45
Kata B.
+11% slower than baseline
Milan T.
+6% slower · poor sleep reported
Adam K.
Hasn't tested yet · reminder sent
Sara N.
In normal range
Bence H.
In normal range · best this month
Reaction time tells you what changed. The 60-second morning check-in tells you why. Sleep, rest, and soreness — logged in under a minute, before your feet hit the floor.
Morning check-in
Today · 60 seconds
Subjective wellness surveys are useful — and easy to game. Reaction time isn't.
The Psychomotor Vigilance Task (PVT) is one of the most studied objective measures of alertness and fatigue — the same paradigm used in NASA fatigue research.
PVT performance is sensitive to sleep loss and overload before the athlete feels it — an early-warning signal that surveys alone miss.
Every result is compared against the athlete's own baseline — not a population average — so the signal is personal from day one.
Nextletic Ready is part of the Nextletic ecosystem — alongside Nextletic 360 and the Coach App for AI-powered performance measurement.
Explore the full platformHave questions? We'd love to hear from you. Send us a message and we'll respond as soon as possible.
Whether you're an athlete looking to transform your training or a team seeking performance insights, we're here to help.
