Language
Rune
Mutate one letter at a time to climb from START to END. Every step must be a real word — and higher tiers demand the shortest path.
Language · Vocabulary
Cognitive skill
Language
Session length
2–3 minutes
Difficulty
Balanced
What it trains
The skills behind Rune
Vocabulary
Lexical Search
Planning Under Constraint
What it measures
How Rune feeds your trends
Every session contributes to your Language rating, which rolls into your Brain Fitness Index — a single 0–100 score across all six skills. Difficulty adapts to you, so Rune 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 Rune in the CogDojo app
Quick 2–3 minutes sessions on your phone. Watch your Language trend take shape — free to start.
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