NBack vs Span N

The N-Back Challenge isn’t just a game.
 It’s a scientifically validated cognitive upgrade —
 engineered to boost your IQ in just 7 hours total. Built on Research. Designed for Results.
 Forget brain-training fluff.
 This is dual n-back — the only method proven to actually increase fluid intelligence, with results published in New York Times, The Wall Street Journal and other top journals. But here’s the truth:
 It’s brutal. It’s exhausting. It works. If you can complete 20 sessions, you may unlock:
 • Sharper memory
 • Faster learning
 • Enhanced problem-solving
 • Stronger focus under pressure Track your progress.
 See real gains — backed by data.
 All within a beautifully designed, customizable experience. This is not for everyone.
 But if you’re hungry to evolve,
The Challenge awaits. This app is only available in English. Privacy Policy: https://boostiq.app/privacypolicy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Train your brain with the gold standard of cognitive training. Span N-Back is a scientifically-designed working memory training app based on the dual n-back task — the only cognitive training method shown in peer-reviewed research to improve fluid intelligence. WHAT IS N-BACK TRAINING? The n-back task challenges you to remember sequences of positions and sounds, then identify when the current stimulus matches one from "n" steps back. It's simple to learn but progressively challenging, keeping your brain in the optimal training zone. WHY SPAN N-BACK? • Research-Based Design — Built on the Jaeggi dual n-back protocol used in cognitive science studies • Precision Timing — Sub-20ms stimulus accuracy for reliable training • Progressive Difficulty — Levels 1-9 adapt to your growing abilities • Dual Modality — Train visual and auditory working memory simultaneously • Detailed Analytics — Track accuracy, reaction time, and progress over time • Privacy First — All data stays on your device. No accounts, no tracking. WHO IS THIS FOR? Whether you're a student preparing for exams, a professional seeking mental edge, or anyone interested in cognitive fitness — consistent n-back training can help sharpen focus, improve working memory capacity, and enhance mental agility. FEATURES • Clean, distraction-free interface • Visual and audio training modes • Session history and performance tracking • Export your data (JSON/CSV) • Dark mode support • Designed for daily practice Start with 2-back and work your way up. Just 15-20 minutes daily can make a difference. Download Span N-Back and train smarter.