Welcome to AI Jargonaut

The language of artificial intelligence, explained on your device.

RAG, MoE, LoRA, quantization, tool calling. AI vocabulary arrives faster than anyone can keep up with, and a web search gives you a marketing page instead of a definition. AI Jargonaut gives you the definition — where the term came from, who coined it, and when.

Initially with 47 terms, carefully sourced

Every starter entry cites its origin: the paper, the announcement, or the publication it first appeared in, with the date. From AI (Dartmouth, 1955) to ACP (2025). Several come with a diagram.

Missing a term? Your device writes it

Type an acronym and Apple Intelligence fills in the full term, a plain-language definition, its source, and when it first appeared. On supported devices this runs entirely on device — nothing is sent anywhere. And nothing is saved until you've read it: every generated entry lands in a review sheet where you can correct any field first.

Private by design

No account to create. No server to ask. No analytics, no tracking, no advertising. Your terms live on your devices and in your own iCloud.

Yours to edit

Rewrite any definition in your own words. Attach your own illustrations. Entries you've written or changed are marked, so you always know which are yours.

On every device you own

Terms sync through your own iCloud account, so the same dictionary is waiting on iPhone, iPad, Mac, and Apple Vision Pro.

Where you already look things up

Search your terms from Spotlight. Ask Siri to define one. Keep the Term of the Day widget on your Home Screen.

Take your data with you

Export the terms you've written as plain, readable JSON, and import a list someone else made. It's your dictionary — the file format is documented right in the app.

Apple Intelligence features require a supported device with Apple Intelligence turned on. Without it, every other feature works and you can enter terms yourself. iCloud sync requires an iCloud account.

What's New in 2.0:

• Search now covers full terms and definition text, not just acronyms — type "retrieval" and find RAG

• Recent lookups, as search suggestions on iPhone and iPad and as a column on Mac

• Term of the Day widget; tap it to open that term

• Illustrations on selected terms, and you can attach your own to any entry

• Choose exactly which terms go into an export

• Clearer messages when iCloud can't sync — no account, storage full, or signed out

• Apple Vision Pro support

Review notes:

No account or login is required; all features are available on first launch.

Apple Intelligence: the "Look up with Apple Intelligence" buttons on the Create and Ask screens require a device with Apple Intelligence enabled. On a device without it, the app shows an explanation and the fields can be filled in manually — no feature is blocked. All model output passes through a review sheet, labelled as generated, before anything is saved.

Data: terms are stored in SwiftData and synced to the user's own private CloudKit database. We operate no server and receive no user data.

To test import: the Import button (Browse or Ask toolbar) opens a sheet documenting the JSON schema with a copyable example.

Privacy nutrition label: Data Not Collected. There's no analytics SDK, no network traffic beyond CloudKit, and the CloudKit data is in the user's private database, which we can't read.

Age rating: 4+.