Open Dict: Dictionary & AI

OpenDict — Offline Dictionaries and Custom AI

Bring your own dictionaries, look up words offline, and compare definitions side by side in one app. Customize AI explanations, highlight passages, and sync your notes across Mac, iPhone, and iPad.

Your Dictionaries, Offline
Import MDX/MDD, MOBI, StarDict, dictd, TXT, and TSV files. Switch between dictionaries with tabs or read them in a single view with collapsible sections. Entries retain their original formatting, images, and examples, with support for MDD audio and Dark Mode.

AI Explanations, Your Way
Use your own API key and choose your model and language. Switch prompts during a lookup, run it again, or revisit the last result for each prompt. Use built-in templates for definitions, translation, and near-synonym comparisons, or write, test, and preview your own. Supports OpenAI, DeepSeek, Kimi, Zhipu GLM, Claude, Gemini, and custom API endpoints.

Highlights, Notes, and Vocabulary
Highlight passages in multiple colors, take Markdown notes, and jump back to the original passage. Organize saved words with groups and star ratings. Sync lookup history, vocabulary groups, notes, and AI settings with iCloud.

Quick Lookup on Mac
Look up text from the menu bar, macOS Services, or the clipboard. Pin or resize the floating window and pick up where you left off when switching back to the main window.

One-Time Unlock
Use up to five dictionaries for free. A single purchase permanently removes the limit across Mac, iPhone, and iPad with the same Apple Account. No subscription required.

Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/