Speed
Quartz
Rotate and drop the falling crystals to clear lines — read the queue and set up big clears before the floor speeds up.
Speed · Mental Rotation
Cognitive skill
Speed
Session length
2–3 minutes
Difficulty
Balanced
What it trains
The skills behind Quartz
Mental Rotation
Spatial Planning
Processing Speed
What it measures
How Quartz feeds your trends
Every session contributes to your Speed rating, which rolls into your Brain Fitness Index — a single 0–100 score across all six skills. Difficulty adapts to you, so Quartz stays in your stretch zone, and you can review how it trends over time on the web dashboard.
CogDojo measures and motivates your training. It is not a medical product and does not diagnose, treat, or prevent any condition.Play Quartz in the CogDojo app
Quick 2–3 minutes sessions on your phone. Watch your Speed trend take shape — free to start.
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