OpenMDict

The ultimate MDict reader you deserve: Unlimited dict imports & user groups, iCloud sync, Pop-up lookup, Multi-article layouts, Multi-window, keyboard shortcuts

OpenMDict is a free, open-source MDict (.mdx/.mdd) dictionary reader for iPhone and iPad.

► THREE LAYOUT MODES & MULTI-WINDOW ON iPadOS

• View definitions from multiple dictionaries simultaneously in Columns, Grid, or List layout — compare and cross-reference at a glance.
• Desktop-class productivity with multiple windows and 30+ keyboard shortcuts.

► POP-UP LOOKUP & JUMP SEARCH

• Look up words from any app via the Action Extension pop-up.
• Keep jump-searching unfamiliar terms within definitions until every word is clear.

► iCLOUD SYNC & UNLIMITED GROUPS

• Dictionaries, bookmarks, history, and lookup counts sync across all your devices
• Import unlimited dictionaries, create unlimited groups, no subscriptions, no ads, no paid tiers.

► PRESET DICTS INCLUDED & DARK ENHANCEMENTS

• Choose from 65 curated open-source dictionaries (WordNet, JMdict, CC-CEDICT, and more) — download and start using immediately.
• Enhance third-party dictionaries' readability in dark mode, with 7 levels of adjustable brightness per dictionary.

MORE FEATURES • Full MDict format support: V1 (LZO), V2 (zlib), MDD resources, obfuscated dictionaries • Lemma-aware search — finds base forms and inflected variants automatically • Siri Shortcuts, Spotlight search, Quick Actions, Share Extension, Drag & Drop • 13 languages: English, 简体中文, 繁體中文, 日本語, 한국어, Español, Deutsch, Français, Português (BR), Русский, Українська, العربية, हिन्दी