N-Back Training: Mental Math

Equations keep coming, and you answer the one you saw a few turns ago while calculating the next.
Memorising and calculating at the same time, a dual task that keeps your head working.
This is the N-back task, a working memory exercise.

SLEEP & SCORE (APPLE HEALTH)
- Reads sleep and steps from Apple Health. "Sleep & Score" in the Review tab shows last night's sleep, today's steps, and your accuracy by how long you slept
- "What Health reveals" answers questions from your own records, such as how many hours of sleep make you sharpest and how far two short nights pull your score down (Premium)
- Saves how your mind feels after each round to Apple Health as State of Mind
- Health data stays on this device and is never sent anywhere. Not for medical use

KNOW YOUR MENTAL CONDITION
- After every round, slide along a color band to record how your mind feels, from foggy to clear
- "When your mind feels clear" ranks when you most often feel clear, such as mornings, your first round of the day, or after a break
- "Mood and score" plots each round so you can check whether clearer rounds score higher


THREE INPUT MODES
- Tap: answer quickly with number buttons
- Writing: write the digit on screen with your finger
- Listening: the equation is read aloud and never shown. Keep your eyes closed, listen, remember, and write

BUILT FOR HABIT
- One short session a day
- Streak counting
- Record how your head feels after each session

WHAT YOU LEAVE BEHIND
- A graph of how far up the levels you have climbed
- The hours you tend to practise, and total time
- A calendar showing which days you played

WHERE YOU STAND
- Connect Game Center to see your rank in the world
- Today, this week, and all time
- Ranks are free for everyone

INSIGHTS
- Once enough sessions pile up, the app names a pattern you would not notice yourself
- Accuracy runs higher on mornings; a level you lost tends to return after a rest day
- Differences between levels are factored out, so moving up alone is never called "doing well"
- Available on devices with Apple Intelligence, processed entirely on device

MAKE IT YOURS
- Set the number of questions and the time limit
- Choose a starting level, up to the highest you have reached
- Three colour themes
- iPhone and iPad

1 5 minutes a day is enough to start.

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