CASify

CASify is a learning app that explains your CAS calculator to you — calmly, thoroughly, and step by step. Built specifically for upper secondary school students, it covers everything from basic calculator operation to Analysis, Algebra, Statistics, and Geometry. Most students get handed a TI-Nspire CAS at some point in year 7 or later, along with a 300-page manual that reads like it was written for engineers, not teenagers. Scattered YouTube tutorials don't help much either — you end up watching twenty minutes of video to find the one menu path you actually needed. CASify was built to close that gap: structured, searchable explanations you can actually use. What you'll find inside: Every important function comes with clear, step-by-step instructions — key by key, in the right order. Long, confusing menu paths get turned into something you can actually follow. Formulas are shown in authentic CAS notation, not simplified textbook versions that don't match what's on your screen. A favourites feature lets you bookmark the functions you use most, and everything is organised by grade level, from year 7 through to your final exams, so you're never wading through content that doesn't apply to you yet. Each topic comes with real examples and practical tips — not just the "how," but the "why," which tends to matter more once you're under exam pressure and things stop making sense on their own. Two ways to use it: CASify comes in two versions. CASify Lite is free and covers the basics — calculator operation and foundational algebra — a solid starting point for students in years 7 through 10. CASify Pro unlocks the full picture: Analysis, Statistics, Geometry, every grade level up to your final exams, unlimited favourites, and dark mode. It's a one-time purchase, not a subscription — pay once, keep it forever. What it doesn't ask of you: The app works entirely offline, whether you're studying at home or reviewing on the go. No account, no registration — install it and go. There's no advertising in the core learning content, no tracking, and no data collected about you. CASify Pro is a single payment with no hidden costs and nothing recurring. CASify is available in German and English, works in both light and dark mode, and runs on iPhone and iPad alike. At the end of the day, the idea behind CASify is a simple one: you should be able to focus on the math, not on hunting for the right button. Which button that is — and why it does what it does — is exactly what the app is there to explain.