Backtrack

N-back level

1

Compare each step with the one 1 back

Today's session 0 / 12 rounds

0day streak

0/20challenge days

1highest level

1-back 0 / 21

+

Round 1 of 12

Nice work!

0%Position

0%Sound

Both ≥ 90% raises the level · either < 75% lowers it

Session complete

All 12 rounds done

0avg level

0highest

0day streak

0%avg position

0%avg sound

0/20challenge

1current level

1highest level

0current streak

0longest streak

0sessions

0rounds

0all-time avg

0/20challenge

Average level per day

last 30 days

Accuracy per day

Position Sound

Calendar

Recent rounds

When	Level	Position	Sound

Appearance

ThemeFollow the device, or always light or dark

Game

Show gridDraw the 3×3 grid lines Swap buttonsSound left, Position right Button deselectionTap a button a second time to deselect it VibrationHaptic tick on tap (Android)

Letters

Letter modeLetters are read aloud

Voice languageLanguage the letters are read in VoiceLetters are read aloud by your device

Advanced

The default settings match those used in the scientific studies (3 s per step, automatic levelling, no instant feedback). Changing them may reduce the benefit.

Scientific modeLock settings to the study protocol

Instant feedbackButtons flash green or red when tapped Level controlsSet your own n-back level after each round Speed1.0× · 3.0 s per step

Data

Import data

All data stays on this device.

Each step, a square lights up on the grid and a voice says a letter.
At level 1, compare each step with the step right before it: step 2 against step 1, step 3 against step 2, and so on.
If the square is in the same place, tap Position. If the letter is the same, tap Sound. Both can match at once, so tap both.
At level 2, compare against two steps back: step 3 against step 1, step 4 against step 2. Level n means n steps back.
A round has 20 + n steps, 3 seconds each. After the round, if both scores are 90% or more your level goes up. If either is below 75% it goes down. Otherwise it stays.
Play 12 rounds a day (≈20 minutes). Aim for 20 days. Your day resets at 4 AM.

Score per channel = hits ÷ (hits + misses + false alarms). Keyboard: A position, L sound.