N-Back Hz

A dual n-back trainer built for performance. Precise audio-visual synchronization and instant feedback.

Train your working memory — the mental ability behind focus, learning, and problem-solving. N-Back Hz is designed for serious practitioners who want a fast, responsive, and deeply configurable training experience.

Built from the ground up, N-Back Hz delivers zero-lag stimulus timing that you can feel from your first session.

THREE WAYS TO PLAY
— Campaign — structured tracks across Beginner, Variants, Speed, Patience, and Endurance, each with leveled progression and perfect-run stars
— Daily Training — a focused routine with streaks, weekly progress, and a daily target
— Quick Play — pick an N and go, with full per-session control

ADAPTIVE SKILL RATING
An Elo-inspired rating system tracks your ability per configuration. Your first 10 blocks calibrate faster, then the system smoothly adjusts based on sustained performance — no jarring jumps from a single lucky or unlucky block.

DEEP STATISTICS
— Skill rating progression charts
— Reaction time histograms
— Position heat maps revealing spatial blind spots
— Per-session drill-down with trial-by-trial data
— Filter by game mode, pace, and stimulus duration
— Export all data as CSV

GAMIFICATION THAT REWARDS REAL TRAINING
— Daily streak with configurable Lenient or Strict mode
— Skill badges that unlock as you reach new tiers
— Weekly progress and training calendar in your Profile
— Best streak and lifetime stats at a glance

FULLY CONFIGURABLE
— 4 pace options (2.0s – 3.5s intervals)
— 3 stimulus durations (300ms, 500ms, 700ms)
— Customizable letter sets with male and female voices
— Independent Daily Training and Quick Play settings
— Haptic, visual, and audio feedback toggles
— Customizable accent colors and per-theme grid backgrounds with live preview
— Four themes tuned for different lighting: Dark, Matte, Black (true OLED), and Light

LEARN BY DOING
A built-in tutorial walks you through dual n-back with a guided demo and a hands-on practice block — no manual, no guesswork.

BUILT FOR FOCUS
— 120Hz ProMotion rendering
— Clean, distraction-free game interface
— No ads, no distractions

TRAIN FOR FREE
Play freely up to N=4 in Daily Training and Quick Play, plus the full Beginner and Variants Campaign tracks — enough to build real working-memory gains. Unlock the deeper levels and the Speed, Patience, and Endurance Campaign tracks with a single $4.99 purchase. No subscriptions, no ads, ever.

FULLY OFFLINE
No account required. No data leaves your device. Just open the app and train.

Part of the Levmeup ecosystem — a suite of precision brain and fitness training apps. Learn more at levmeup.com