2027 Edition coming
TI-84 Plus CE Guidebook
For the TI-84 Plus CE and CE Python
PaperbackKindle
Publisher · App Studio · Applied AI
Making complex things simple. From guides to AI.
Fredinax Tech publishes calculator guides and reference cards, builds everyday apps, and develops applied AI for our products and partners.
01Fredinax Education · Books & cards
Guidebooks that make the calculator click.
From the blog
All articlesComparison · Calculator guides
Which calculator guide do I need?
Read the guideTI-84 Evo · Calculator guide
How do you get started with the TI-84 Evo?
Read the guideCalculate 84 AI · Product overview
Calculate 84 AI: the AI graphing calculator app that scans handwritten math and shows the keystrokes
Read more02Our apps
Apps we build and run ourselves.
Calculate 84 AI
iPhone · iPad · Mac
AI-enhanced graphing calculator intended for use with TI-84: scan a worksheet, a data table or a handwritten equation to set up the calculator, then ask by text or voice for the exact keystrokes.
Cat Allergy Buddy
iOS · Android
AI-powered cat allergy tracker and relief coach: symptom diary, daily habits, AI coach.
03Applied AI
We build AI into real products.
01
Vision and handwriting recognition
Our scanner reads a handwritten multi-line formula correctly in under 5 seconds.
02
AI features in mobile apps
iOS, Android and Mac, from prototype to App Store.
03
Custom tools on current language models
For education and consumer products.
04Investments
Selective investments in AI and technology.
We take long-term positions in founders and companies building applied artificial intelligence and the technology around it.
01
Applied AI
02
Developer tools and infrastructure
03
Consumer software
04
Frontier technology
05About
The company behind the books and apps.
Fredinax Tech is the umbrella for our publishing imprint, our own apps and our AI development work.
- Company
- Fredinax Tech LLC, Sheridan, Wyoming, USA
- Imprint
- Fredinax Education, the publisher name on our books and cards
- Author
- Guidebooks written by Marco Wenisch
- Apps
- Calculate 84 AI and Cat Allergy Buddy
06Contact
What can we help with?
Questions about a book or card, help with one of our apps, or an AI project in mind: pick a topic and write to us. We read every message.
contact@fredinax.com
Opens your mail app with the subject “Books & cards”.
