100% On-Device AI · 9 Languages

LaternZona
Your dictionary, offline.

A new kind of dictionary, powered by an AI model that runs entirely on your iPhone, iPad, and Apple Silicon Mac. Pick same-language mode for pure English-English (or 日本語-日本語, 中文-中文 ⋯) definitions, or translation mode to bridge any pair of 9 supported languages. Either way, every example sentence is freshly generated for your context — not pulled from a 1998 textbook.

iPhone · iPad · Mac (Apple Silicon)

Download on App Store See How It Works

LaternZona search screen — accessibility definition

Built around you.

Most dictionaries treat every learner the same. A surgeon, a software engineer, and a high-schooler all read the same example sentence for "execute." LaternZona's AI generates examples on the fly — ask again, get a different angle, in a context that fits your life.

Examples Written for YOU

AI-Generated, Not Static:
Every example is freshly generated by an on-device AI model — tap regenerate, get a new angle.
Your Context, Your Examples:
Configure example style (everyday, academic, business) so the model writes sentences you can actually use tomorrow.
Words and Phrases:
Look up single words or multi-word idioms, phrasal verbs, and slang — all in the same interface.

Privacy by Architecture

No Backend, No Cloud:
We don't have your search history because nobody has your search history. There is no server.
Works on Airplane Mode:
Download the model once. Cut the network entirely. The app keeps working — forever.
No Accounts:
No sign-up, no email, no tracking SDKs. Open the app and search.

Save. Review. Master.

Bookmark Vocabulary:
One tap saves the full entry — including the AI-generated examples that worked for you.
Spaced-Repetition Flashcards:
Built-in review system that surfaces words right before you'd forget them.
PDF Export:
Export your vocabulary list to a clean PDF — share with a tutor or print for offline study.

9 × 9 Languages, Any Direction

Same-Language Dictionary:
English-English, 日本語-日本語, 中文-中文, etc. — pure monolingual definitions for advanced learners.
Cross-Language Translation:
Look up a word in any of 9 input languages, get the answer in any of 9 output languages. 81 combinations total.
Side-by-Side Examples:
In translation mode, every example sentence shows the original alongside its translation.
Independent Axes:
UI language and AI output language are set separately — no forced bundling.

Supported Languages

English 繁體中文简体中文日本語 Español Français Deutsch العربية हिन्दी

See It in Action

LaternZona — English-English dictionary mode

LaternZona — translation mode (English → Traditional Chinese)

LaternZona splash screen — on-device model loading

Native iPad Layout

Universal app with a content-cap that keeps lines readable on the big screen — including full RTL support for Arabic and proper script rendering for Devanagari, Hiragana, and CJK.

LaternZona on iPad — centered content with adaptive width cap

Runs Natively on Apple Silicon Mac

One purchase, three devices. The same on-device AI model that powers LaternZona on iPhone and iPad runs natively on M-series Macs — same app, full window controls, the dictionary you keep open in a corner of your desk all day.

LaternZona running natively on macOS — search results for the word 'tragedy'

How It Works

The same architecture that makes the app private also makes it fast and resilient.

Step 01

Download Once

On first launch, the app downloads an AI model sized to your device's RAM. After that, you never need a network connection again.

Step 02

Search Instantly

Type a word or phrase. The model streams a structured response — definition, examples, pronunciation, etymology — directly to your screen.

Step 03

Stay Private

Your query never leaves the device. There's no analytics SDK, no telemetry, no backend. Just you and a local model.

LaternZona Your dictionary, offline.