Comparison
The only one on the calculator students actually use.
Other AI calculators mod older, monochrome TI-84s. DojoCalc is built on the TI-84 Plus CE: color screen, live camera preview, and the model that doesn't look out of place in 2026.
| DojoCalc | calc.ninja | retard.dev | |
|---|---|---|---|
| Calculator model | TI-84 Plus CE | TI-84 Plus | TI-84 Plus / Silver Edition |
| Screen | 320×240 color LCD | 96×64 monochrome | Monochrome |
| Live camera preview | Yes, see the page as you aim | No, snap then hope | Not offered |
| Answers on screen | Color typeset math | LaTeX on a 96×64 grid | Plain text |
| Blends in today | The model still in every backpack | Older model | Older model |
| AI | Credits included, then your own key | Your own key (GPT, Claude, Gemini, Grok) | DeepSeek, ChatGPT, Gemini |
| Price | One-time, no subscription | $250 one-time + your key | Varies (beta) |
| Shipping | Fast, included | Express is +$150 | Varies |
Based on each company's public website as of June 2026. Specs change, so check theirs and ours before you buy.
Why it matters
The CE isn't a nice-to-have. It's the whole point.
- Only one on the CE
- Everyone else mods the older TI-84 Plus or Silver Edition. Those are increasingly the ones proctors eye. The CE is the model students actually carry now, so DojoCalc is the one that disappears.
- You see what you scan
- On a tiny monochrome screen you snap a photo and hope you framed it. The CE's color screen shows a live camera preview with a scan guide, so you read the problem before you ever solve it.
- Answers that read like a textbook
- A 96×64 grid can't show much. The CE renders fractions, roots, integrals, and chemistry as real typeset notation, in color, the way the answer was meant to look.