OpenMDict

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