GhostCalc
Calculator menu
The GhostCalc menu running on the real TI-84 screen.
Chat, camera, history, settings, and exit are controlled from the calculator itself.
GhostCalc tucks a full AI — chat, a step-by-step solver, smart notes and camera vision — invisibly inside your TI-84. No computer. No cables. Nobody can tell.
GhostCalc looks and feels exactly like the calculator you already know — until you ask it something.
Type a question on the TI-84, send it over the built-in Wi-Fi bridge, and read a clean answer back on the LCD. Powered by GPT-5.5 with smart routing — quick questions stay fast, hard ones get the deep model.
The 5MP Vision build adds an onboard camera that captures the calculator screen, your notes, or a diagram — so the AI answers your exact problem, with the full visual context.
The ESP32-S3, firmware, power tap and link-port interface are built into the original TI-84 shell. From the outside it's the same calculator — same weight, same buttons, same look.
Type your question straight on the TI-84 keypad, or snap the screen with the camera on the 5MP Vision build.
The hidden ESP32-S3 sends it over Wi-Fi to GPT-5.5 and streams the reply back through the link port.
A clean, readable answer appears on the LCD — or a full program is injected, ready to run.
Actual device photo
This is the actual on-device menu customers use after the build is installed. No laptop window, no external display, no extra box — just the calculator screen.
A quick look at the pieces customers actually care about: the calculator menu, the ESP32-S3 camera module, and the on-device AI flow.
Chat, camera, history, settings, and exit are controlled from the calculator itself.
The camera version can capture notes, equations, and diagrams for visual context.
Every GhostCalc is hand-assembled and bench-tested before it ships.
Modify Mine is for people who already have the right TI-84. If you are unsure, use this as the first pass before checkout.
Pick the closest model. Standard and 5MP Modify Mine orders are meant for TI-84 Plus hardware.
TI-84 Plus units are the main supported mail-in calculator. Choose Modify Mine during checkout to save $50.
You keep ownership of your calculator, send it in, and get it back with the GhostCalc install completed.
A tighter review section built around real-use notes: setup help, quick delivery, and the calculator doing what it is supposed to do.
"Ordered the basic TI-84 GhostCalc, works great, and the setup walkthrough made it easy."
"Customer support was handled almost instantly when I needed help with my order."
"Bought the firmware and got it sent over fast. The process was simple."
"It works exactly as advertised. The calculator feels normal until the AI menu opens."
The product cards are quick, but this is the cleaner breakdown: what is included, what changes with Modify Mine, and what gets tested before anything ships.
Every ready-made and mail-in build gets a practical checkout pass, focused on what customers actually use.
Keys, menus, battery behavior, and normal TI-84 functions are checked first.
The ESP32-S3 connects and returns a response through the calculator workflow.
A real prompt is sent and the reply is verified on the device screen.
Program transfer behavior is checked before packaging.
5MP units get a camera capture check for notes and equations.
Orders are packed with the right instructions and matched to tracking.
Buy a ready-made unit, choose Modify Mine at checkout to send your own TI-84 Plus for $50 off, preorder 5MP, or grab the DIY PCB board and build your own.
Choose Standard or 5MP, then select Modify Mine in checkout. That takes $50 off the build.
Use the Shipping Instructions page and include your checkout email inside the package.
Modify Mine includes return shipping after the install. DIY PCB orders use normal shipping rates.
Send a photo of the calculator model before ordering and the build can be checked first.
Prices in USD · Secure Stripe checkout · Cards + eligible stablecoin crypto · Worldwide shipping
Join thousands of students already using GhostCalc to study smarter — without anyone noticing.
For setup, order status, firmware notes, or custom build questions, this is the fastest way to reach the GhostCalc side of the workshop.
Talk with the builder, get setup help, and follow updates as new firmware rolls out.
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