MathMod vs Dual N

MathMod allows to plot 3D mathematical surfaces, described by implicit or parametric equations, and offers a very large database of model samples that can be generated with it. Apart from visualizing the actual shape, you are also free to edit the scripts and equations in order to understand how each parameter influences and reshapes the model. Moreover, MathMod can also be used to export to OBJ format and generate animations that showcase how the model morphs as it is given new parameters to work with.

Track positions and spoken letters, then spot matches from N turns earlier. Learn the rule with a short guided position round. Free: three daily Dual sessions at N-1 and N-2, plus 12 unlimited Lab games, including Stroop, Schulte and chimp memory. Pro adds higher levels, more streams and unlimited sessions. Dual N-Back asks you to track several pieces of information and compare them with those presented a few turns earlier. 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. Complete a session at your highest unlocked level with at least 80% accuracy on every stream to unlock the next level. The exercise asks you to follow positions and sounds carefully. 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 A 7-day free trial is available on the yearly plan for eligible accounts. The offer and the subsequent price are shown before purchase. Lifetime available as a single payment. ON THE SCIENCE Dual N-Back is a working-memory exercise studied in research. 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/