Measure your reflexes in milliseconds with a free 5-round reaction test. Plus coordination drills, rhythm and mobile modes. No signup, no install — runs instantly in the browser.
Reaction Time Trainer — Free Browser Game was submitted to SlowDen by Coordination Trainer. SlowDen did not make this game - it is published here from the developer's own submission, added on 2026-09-16. It runs in the browser with no download, no install and no sign-up.