LaternZona
Your AI dictionary, offline.
USD 5.99 · Designed for iPad. Not verified for macOS.
Forget one-size-fits-all dictionaries. LaternZona's on-device AI writes example sentences around what YOU care about — and runs 100% offline. Your words, your context.
Learning what YOU want matters more than memorizing what a textbook gave everyone else.
LaternZona is a new kind of English dictionary, powered by an AI model that runs entirely on your iPhone — no accounts, no cloud, no tracking. Look up any word or phrase, and instead of one frozen example sentence written in 1998, get fresh examples tuned to the way you actually use the language.
WHY AI BEATS A STATIC DICTIONARY
Traditional 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. Perfect accuracy matters less than relevance. The best example sentence is the one you can actually picture using tomorrow.
FEATURES
• AI-generated definitions, examples, and pronunciation for any English word or multi-word phrase (idioms, phrasal verbs, slang)
• 100% on-device AI — powered by Google's Gemma model running locally. Works on airplane mode. Works on the subway. Works forever.
• Two lookup modes, any direction — pure same-language dictionary (English-English, 日本語-日本語, 中文-中文, etc.) OR cross-language translation between any pair of the 9 supported languages: English, Traditional Chinese (繁體中文), Simplified Chinese (简体中文), Japanese (日本語), Spanish, French, German, Arabic (العربية), Hindi (हिन्दी). Set input and output languages independently — 9 × 9 = 81 combinations.
• Bookmark & review — save words, run spaced-repetition flashcards, export your vocabulary list as PDF
• Two-axis localization — set your UI language and AI output language independently
• Auto language detection for input — type in any supported language, get an English-anchored explanation
PRIVACY BY ARCHITECTURE, NOT BY PROMISE
Most "AI" apps send every query to a server. LaternZona physically can't — there is no backend. After you download the model once, you can delete the cellular signal from your phone and the app keeps working. We don't have your search history because nobody has your search history.
MADE FOR SERIOUS LEARNERS
Whether you're prepping for IELTS, reading English literature, or just trying to nail a tricky phrasal verb at work, LaternZona meets you where you are. Ask the question your way. Get the answer in your language. Build vocabulary that sticks.
Download once. Learn forever. Offline.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
What's new in 1.5
• On Mac (Designed for iPad), LaternZona now recognises your already-downloaded model instead of showing “Downloading model” on every launch — it starts in seconds from the local cache.
The developer, Chih Jen Chuang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Chih Jen Chuang
- Size
- 26.9 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 8 more
- English, Arabic, French, German, Hindi, Japanese, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- Copyright
- © TSUGAS

