Fair rules
- One phone, passed around. Every phone has different screen and touch delay.
- Fixed difficulty: Normal. Each difficulty has its own curve.
- One warm-up: Practice mode isn’t recorded, so everyone gets one try.
- Win on the average: Reaction Time averages 5 rounds automatically.
Picking tests
| Mood | Test | Why |
|---|---|---|
| All ages | Reaction Time | One-line rules, short rounds |
| Laughs | Color Trap | Meaning and ink color clash |
| Fun to watch | Chimp Test | Tension rises with every extra number |
| Self-control duel | Impulse Control | Someone always taps the red |
Chimp Test
Reflex Lab’s Chimp Test has you memorise where numbers sit, then tap them in order from 1. The moment you tap 1, the rest are hidden, and each cleared board adds one more number. You get three strikes.
Color Trap
Color Trap gives you 30 seconds to judge whether each word’s meaning matches its ink color: +1 for right, −1 for wrong.
With faraway friends
The Daily Challenge picks 5 tests by date, so everyone gets the same set on the same day. Compete with family or friends elsewhere on “today’s challenge” and you’re playing the same tests. It runs at whatever difficulty you’ve selected, so agree on that too. You’re on different phones, so laugh off a few milliseconds.
Sharing results
Share a result card
Tap Share on the result screen to send an image card with your score and “top % of humans” to the group chat. The default card background is free; other skins (Midnight, Sunset, Aurora, Ember, Mono) and watermark removal unlock permanently with one ad each.
FAQ
Won’t everyone’s scores get mixed together on one phone?
The app has no user profiles, so everything is saved as one person’s history. To protect your own records, keep Practice mode on during the duel and compare the numbers on the result screen.
Can we duel with the Full Gauntlet?
The Full Gauntlet runs every unlocked test back to back and takes a while. At a party, one or two tests is about right.
Reflex Lab: Brain Speed Test
No sign-up, fully offline, records stay on your device. Free on Android.