Practise a specific action
Repetition usually helps you perform the same task more accurately. The most reliable effects concern the skill that is actually practised.
Your practice starts here
Cognitive
exercises.
Six free online exercises. No accounts, subscriptions or rankings — just you, one clear rule and the next accurate response.
Synchronous focus100 steps
100 → 11 → 100
06exercises
3–7minutes per round
0exercise results sent
∞repetitions
Why use them
What these exercises are for
These are short exercises for attention, working memory and response control. You can use them as a brief mental warm-up before work or study: keep a rule in mind, spot what matters among distractions, remember a sequence, pause an automatic response and switch to a new rule. The exercises draw on well-known Stroop, Go / No-Go, Corsi and rule-switching tasks. They do not assess health or intelligence, provide a diagnosis or replace medical care.
Return to one clear rule
Under mental strain, a clear instruction and immediate feedback can provide a structured pause. This is not stress treatment or a substitute for rest or professional help.
Observe your own pattern
Compare only your own rounds in the same task, on the same device and in similar conditions. The site does not calculate a universal norm.
What we do not promise: prevention of dementia or other cognitive disorders, treatment of stress, higher intelligence, or transfer of game scores to everyday life.
Choose a station
Six ways
to hold focus
Start with a simple task. Increase speed or difficulty only after the rule feels familiar. Scores from different exercises cannot be compared.
01
02
Response control
Colour versus word
Answer with the font colour while ignoring the meaning of the word.
03
Visual search
Schulte table
Find the numbers from 1 to 25 in order without losing the centre of the field.
04
05
06
Your rhythm
Results stay
on this device
Only completed rounds, time and game metrics are stored in your browser. They are not sent to us.
- Completed rounds
- 0
- Time in exercises
- 0min
- Last round
- —
Evidence and limits
What research
actually supports
The evidence is not all-or-nothing. Effects are strongest for the practised task and become less certain as the expected transfer gets broader.
Improvement in the practised task
Repetition usually improves speed or accuracy in the same task. Transfer to related tasks is less consistent, and evidence for everyday abilities is much smaller.
Changes in some cognitive measures
Meta-analyses find small average effects in some areas, but outcomes depend on age, programme design, controls, support and study quality.
Prevention and clinical effectiveness
There is no evidence that these six game versions prevent cognitive impairment or dementia, treat stress, or produce clinically meaningful everyday transfer.
Stress and a clear task
Acute stress can impair working memory and cognitive flexibility. A simple task may feel structuring, but this does not prove that the exercise reduces stress.
Primary sources
Before you start
Common questions
Are the exercises free?
Yes. All six exercises are free and work without registration.
Can a score assess health or intelligence?
No. A score only describes one game round under particular conditions.
Where are results stored?
Game history stays in local browser storage and can be deleted by the user.
How often should I practise?
The project suggests one comfortable 5–10 minute round. This is not a clinical recommendation or a proven therapeutic dose.