Dual N-Back: Stroop & Schulte

Stroop test, Schulte table, chimp test, reaction time: 12 brain tests to measure yourself, unlimited and with no subscription. Then Dual N-Back, the most studied working-memory exercise, to train.

Your brain has a limit: how much it can hold in mind at once. Dual N-Back is the exercise built to push that limit.

INCLUDED WITHOUT PRO
The whole Cognitive Lab, with no limit: all 12 tests. Your complete training history. And three Dual N-Back sessions a day, at N-1 and N-2.

The Lab tests measure. Dual N-Back trains: the rest of the app is built around that one exercise, up to level N-15.

HOW IT WORKS
Two streams arrive at the same time: a position on a grid, a spoken letter. You decide whether what you're getting now matches what appeared N turns earlier. You start at N-1. Hit 80% accuracy and the next level opens.

It's hard from the first minute. That's precisely why it works.

UP TO SEVEN SIMULTANEOUS STREAMS
• Dual — position + audio
• Triple — colour joins
• Quad — then shape
• Penta, Hexa, Hepta — up to seven streams at once
Levels N-1 through N-15.

THE COGNITIVE LAB
Twelve short tests: Stroop, Schulte table, chimp memory, reaction time, visual, verbal, number and sequence memory, aim trainer, typing, mental rotation and rule switching. Each keeps your best.

YOUR NUMBERS, NOT BADGES
Progress per level, accuracy broken out per stream, average reaction time, streaks. You see where you stall, not just a score.

DUAL N BACK PRO
• Every level, N-3 through N-15
• Triple, Quad, Penta, Hexa, Hepta
• Unlimited daily sessions
• Full analytics
• Custom Mode and Free Mode
7 days free on the yearly plan. Lifetime available as a single payment.

ON THE SCIENCE
Dual N-Back is the most studied working-memory task since a widely cited 2008 study (PNAS). Transfer to fluid intelligence is still debated in the literature. What is measurable: your progress on the task itself, and it's on screen.

SUBSCRIPTION
Payment is charged to your Apple account at confirmation. Renewal is automatic unless turned off at least 24 hours before the current period ends. Manage it any time in your account settings.

PRIVACY
Training history stays on your iPhone, with iCloud sync through your Apple Account when available. No app account to create, no third-party ads, no ad tracking.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://romeoapps.app/en/dual-n-back/privacy/