# CASify: TI-Nspire CAS Guide — The CAS handbook for exams > CAS calculator guide for high school math exams, offline and ad-free. (iPhone/iPad app by Lennart Koch.) - Source: https://appshunter.io/ios/app/casify-ti-nspire-cas-guide/id6776131288 (this page in markdown: same URL + `.md`) - Developer: [Lennart Koch](https://appshunter.io/developer/6776131290) - Category: Education, Reference - Price: $9.99 - Age rating: 4+ - Requires: iOS 15.1 · 29 MB - Languages: American English, German (Germany) - Released: 2026-06-26 - Data updated: 2026-09-07 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/casify-ti-nspire-cas-guide/id6776131288/reviews.md ## What is CASify? CASify is a learning app that explains your CAS calculator to you, calmly and thoroughly. The app is designed specifically for upper secondary school students and includes guidance for Analysis, Algebra, Statistics, Geometry, and basic calculator operation. What you will find in the app: • Clear, step-by-step instructions for every important function, key by key and in the correct order, • Long menu paths presented clearly with CASify, turning a confusing route into an easily traceable sequence, • Formulas shown in authentic CAS notation, • A favourites feature that lets you mark the functions that matter most to you, • From year 7 through to your final exams, CASify is organised by grade level, keeping the app clear and understandable for everyone, • The search function helps you find relevant content quickly. In terms of content, CASify covers everything you will genuinely encounter in the upper secondary curriculum: from basic operation, through algebra and solving systems of equations, to analysis, geometry, vectors, and statistics. Each function is explained with suitable examples as well as helpful tips and tricks, so that you understand not only how something works, but also why it works that way. This is where CASify becomes particularly valuable, namely when preparing for your next exam or for your final school-leaving examinations. Instead of clicking through endless menus, you can keep your mind free for what truly matters. What CASify does not require of you: • The app works entirely offline, whether you are studying at home or on the go, • You need no account and no registration, and can start using it immediately after installation, • There are no advertisements, and your usage is not tracked, • No data about you is collected, • You pay only once and then have full, permanent access to everything, with no hidden costs. CASify is available in both German and English. You can also choose between a light and a dark app appearance, and use the app on both iPhone and iPad. Ultimately, CASify is built around a rather simple idea: you should be able to concentrate on the mathematics itself, rather than on searching for the right key. Which key that is, and why it does the right thing, is something the app will explain to you. ## Key features - Clear function and button instructions - Simplified menu path navigation - Formulas in CAS notation - Favorite function marking - Sorted by grade level - Quick search functionality - Offline operation ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/casify-ti-nspire-cas-guide/id6776131288/reviews.md ### 5/5 — Immernoch Hilfreich *2026-07-06* Super App. Bin mittlerweile schon im Studium und die App ist auch hier noch hilfreich. Für mein Abi wäre es damals genau die richtige Option gewesen. ## Frequently asked questions about CASify ### What is CASify? CASify is a learning app designed to explain the functions of a CAS calculator for high school students. It covers topics like analysis, algebra, statistics, and geometry, with clear instructions and examples. ### What math subjects does CASify cover? CASify covers essential high school math subjects including Analysis, Algebra, Stochastics (Statistics), Geometry, and Vectors. It also includes basic operations for the calculator. ### Can I use CASify offline? Yes, CASify works completely offline. You can use it for studying at home or on the go without needing an internet connection. ### Does CASify have ads? No, CASify is ad-free. The app does not contain advertisements, and your usage is not tracked. ### How much does CASify cost? CASify is a one-time purchase priced at $9.99. This grants you permanent access to all features without any hidden costs or subscriptions. ### What devices is CASify compatible with? CASify is available for iPhone, iPad, and iPod. It supports both light and dark app displays. ### How often is CASify updated? The app was last updated on July 14, 2026, with version 1.1. Updates typically include improvements and new content to enhance the learning experience. ### Do I need to create an account to use CASify? No, you do not need an account or registration to use CASify. You can start using the app immediately after installation. ## Version history (last 3 releases) ### 1.1 — 2026-07-14 We've refreshed the design and improved usability throughout the app. CASify now feels clearer and smoother to use, so you can focus on the math, not the interface. ### 1.0.1 — 2026-07-05 In diesem Update haben wir kleinere Fehlerbehebungen vorgenommen und das Design der App weiter verbessert, damit du dich noch einfacher zurechtfindest. ### 1.0 — 2026-06-26 No release notes. ## More apps by Lennart Koch - [CASify Lite](https://appshunter.io/ios/app/casify-lite/id6787475078) All apps by Lennart Koch: https://appshunter.io/developer/6776131290 ## Related topics [ti nspire](https://appshunter.io/ios/topics/ti-nspire) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-07.*