Fredinax Blog
Calculator guides and app notes
Clear answers to the questions students, parents and teachers ask about their graphing calculator, with the real keystrokes. Written by Marco Wenisch, author of the Fredinax guidebooks.
Comparison · Calculator guides
Which calculator guide do I need?
How to tell the TI-84 Plus, TI-84 Plus CE, TI-84 Evo and TI-Nspire CX II apart, and which Fredinax guidebook and reference card fit each model.
Read the guideTI-84 Plus CE · Calculator guide
How do you learn the TI-84 Plus CE quickly?
Learn the TI-84 Plus CE and CE Python in a sensible order: keys and menus, mode settings, graphing, the CALC menu, the Equation Solver and statistics.
Read the guideTI-84 Evo · Calculator guide
How do you get started with the TI-84 Evo?
First steps on the TI-84 Evo: the icon home screen, the fraction and toggle keys, Points of Interest while tracing, and the built-in solvers, with keystrokes.
Read the guideTI-84 Plus · Calculator guide
How do you use the classic TI-84 Plus with the black and white screen?
How to use the black and white TI-84 Plus, Silver Edition and TI-83 Plus: keys, modes, graphing, the CALC menu, solving equations and what changes on the CE.
Read the guideTI-Nspire CX II · Calculator guide
How do you learn the TI-Nspire CX II and CX II CAS?
How the TI-Nspire CX II and CX II CAS work: documents and pages, the menu and ctrl keys, exact answers, graph analysis, solving, statistics and CAS commands.
Read the guideReference cards · Study tips
Why does a laminated quick reference card help with a graphing calculator?
What is on the laminated TI-84 Evo and TI-84 Plus CE Reference Cards, how to use one for homework and test prep, and when you need the guidebook instead.
Read the guideCalculate 84 AI · Product overview
Calculate 84 AI: the AI graphing calculator app that scans handwritten math and shows the keystrokes
Calculate 84 AI by Fredinax Tech LLC is an AI graphing calculator for iPhone, iPad and Mac, intended for use with TI-84. It scans math and shows the keystrokes.
Read moreCat Allergy Buddy · Product overview
Cat Allergy Buddy: the AI-powered cat allergy tracker and relief coach for iOS and Android
Cat Allergy Buddy by Fredinax Tech LLC is an AI cat allergy tracker for iOS and Android with a symptom diary, daily habits and an AI coach. Not medical advice.
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