Welcome to AI Jargonaut

The language of artificial intelligence, explained on your device.

AI Jargonaut turns AI jargon into something you can say out loud without bluffing. Start from a curated set of 66 acronyms and terms — each with its full expansion, a plain-language definition, an everyday analogy to make it stick, where you'd actually meet it, the source it came from, and the date it first appeared — then make the whole dictionary your own.

FROM THE FIRST LAYERS TO THE LATEST WORKFLOWS

The starter set runs from the words used loosely in every meeting — AI, AGI, ASI, LLM, RAG — through to the ones that have only just arrived. New in this version: HYSET, a way for an agent to pick a set of tools that work well together instead of ranking each tool on its own. It joins PPO, GRPO, Tokens, Hallucinations, Misalignment, and Swarms from the previous release.

WHERE EVERY TERM IS ACTUALLY USED

Every entry names the products, systems, and tasks the term turns up in. Not more theory — RAG comes with enterprise Q&A over internal documents and citation-backed chat; Quantization with 4-bit local inference and integer-only edge deployment. It's the line that turns "I've read the definition" into "I'd recognize one."

DEFINITIONS WRITTEN ON YOUR DEVICE

Type an acronym on the Ask screen and Apple Intelligence fills in the full term, the definition, the analogy, the uses, the source, and when it first appeared. On devices with Apple Intelligence it runs entirely offline.

PRIVATE BY DESIGN

What you look up stays with you. There's no account to create, no server to ask, and nothing reported back to anyone.

ON EVERY DEVICE YOU OWN

Terms you add travel through your own iCloud account, so the same entries are waiting on your iPhone, iPad, Mac, and Apple Vision Pro.

WRITTEN BY YOU, NOT JUST FOR YOU

Rewrite any entry in your own words and illustrate it with your own picture — it shows beside the term in the list, just as the app's own artwork does. Change your mind and Restore Original puts back the definition, analogy, uses, source, date, and illustration the term came with. Take the lot with you as a plain JSON file, and bring it back the same way.

A TERM AWAY, WHEREVER YOU ARE

Search your acronyms and terms from Spotlight, ask Siri to define one, or keep one on your Home Screen with the widget, which shows up to seven lines of a definition.

QUESTIONS, ANSWERED

A Frequently Asked Questions page in Settings covers how to edit a field, what editing costs you, how to put the original back, whether your edits and deletions carry over to a new device, how to get back to Browse, what happens to a bad date in an imported file, and why some entries are dated January 1st.

The app speaks Spanish throughout. The dictionary entries themselves are in English.

Definitions are drafted with a language model and offered as a starting point, not as authority. Please read the Disclaimer before you begin.

What's New in 4.7:

A NEW TERM

HYSET — hyperedge-based set-level tool retrieval — helps an AI agent choose tools from a large library by scoring whole sets of tools that are used together, rather than each tool in isolation.

That takes the starter dictionary to 66 acronyms and terms. Entries you've rewritten are left exactly as you wrote them; the new one is simply added alongside.

EIGHT NEW ILLUSTRATIONS

API, BERT, Coding Harness, Embedding, FFN, MLX, Multimodal Model, and NLP now come with artwork of their own, shown in the list and on the term's page.

TWELVE REDRAWN ILLUSTRATIONS

ACP, AGI, AI, CNN, Guardrails, LoRA, MCP, Model Router, NN, Quantization, RL, and RSI have new artwork.

PICK UP WHERE YOU LEFT OFF

The Ask screen reopens the definition you were reading when you last left the app.

COPY PART OF A DEFINITION

Select any text in an entry — the definition, the analogy, the uses, or the source — to copy just the part you need.

MORE ANSWERS IN SETTINGS

The Frequently Asked Questions page now explains how to get back to Browse from the Ask screen, and confirms that your edits and deletions carry over when you set up the app on another device.