Core.01
Reaction
Reaction Time
Record the delay between a browser color change and your click or key press.
Metric: milliseconds (ms)Run test
Cognitive performance benchmark
Test Your
Beat Yesterday.
Measure reaction time, memory, precision, and perception. Save personal bests, understand the gap to your next target, and compete in clearly defined leaderboard windows.
- Tests
- 15
- Categories
- 4
- Access
- Free
System core
Testing Matrix
Five quick entry points into the full catalog. Every test produces a clear metric you can repeat and improve.
Reaction2
Memory5
Precision4
Perception4
How improvement works
Performance Architecture
BrainRivals turns short browser tests into a practical feedback loop: run a benchmark, save the result, and return with a specific target.
- 01
Run
Choose a focused challenge and establish a clear score.
- 02
Review
Compare the result with your own recent baseline.
- 03
Return
Come back with one specific target for the next session.
01
Personal bests
Keep one clear benchmark per test and see when a new run moves your baseline forward.
02
Near-miss context
Understand the distance to your next personal target or leaderboard position without vague progress badges.
03
Leaderboard windows
Compare eligible scores across daily, weekly, and all-time boards while your own record stays intact.
04
Progress history
Review recent sessions, streaks, and trends from a profile that grows from real attempts.
Knowledge Base
Learn & Improve
Practical guides on reaction time, memory, and cognitive performance.
Your next benchmark
One run gives you a target. The next one shows progress.
Start with any test. Play as a guest, or create a profile when you want to keep a history across sessions.