Reflex
Daily reaction test & insights · Free
How sharp are you today? Reflex tells you in 20 seconds. A daily reaction test based on the scientifically established PVT: tap as soon as the screen turns green. Reflex detects false starts and lapses and takes the median as your daily score. It attaches your health data to every test – sleep, steps, resting heart rate, HRV and wake time – and after seven days shows you what really makes you faster. No account, no tracking, everything stays on your device.
How sharp are you today?
Tap when it turns green
What makes you faster
Your reactions over weeks
Know your day in the morning
Coffee, exercise, Monday?
No account. No tracking.
Features
Daily 20-second reaction test that detects false starts and lapses – your daily score is the median
Today tab: 7-day average, streak, personal best and the day's health context at a glance
Apple Health: sleep, steps, resting heart rate, HRV and wake time are attached to each test – read-only, on your device only
History: your reaction time over weeks with details for every test
Insights after 7 days: how strongly each health metric relates to your reactions
Patterns by weekday and experiments with tags like coffee, exercise or alcohol
Daily forecast: an estimate in the morning, the comparison after the test
Widgets for Home and Lock Screen, Siri shortcut, Action button and daily reminder
Reflex Pro
€7.99 / year · or €19.99 one-time
The daily test is free. Reflex Pro unlocks advanced insights, experiments and iCloud sync – try it free for 7 days, then yearly subscription or buy once and keep it forever.
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Your test results and health data stay on your device. Apple Health is read-only, no server, no account, no tracking. Reflex is not a medical device.