1secDic: Offline AI Dictionary
EPWING, MDict & Flashcards
Free · In‑App Purchases
Offline-first dictionary with on-device Apple Intelligence and on-demand cloud reasoning. Blazing-fast 0.3s search, flashcard quizzes, and full EPWING/MDict support!
1secDic: Offline AI Dictionary & Flashcard Companion.
Meet 1secDic—the next-generation dictionary crafted for serious language learners, polyglots, and researchers. By fusing offline authoritative dictionary archives with the reasoning power of Apple Intelligence, 1secDic doesn't just define words—it helps you truly understand and master them.
Search across massive collections in an instant without an internet connection, ask on-device AI to explain subtle nuances, and turn your discoveries into active-recall flashcard study sessions.
Key Features:
- Offline-First Architecture & Private On-Device AI:
Core dictionary lookups across your EPWING and MDict collections work completely offline. Apple Intelligence runs privately on-device for instant nuance breakdowns and example dialogues—with zero data tracking. Need deeper etymology or 32K context? Seamlessly tap to refresh via Apple's Private Cloud Compute on demand.
- Interactive Flashcard Quiz Mode:
Never forget a word again. Seamlessly convert your bookmarks and search history into active-recall study decks. Features fluid 3D card flips, auto-scrolling marquee cards for comprehensive definitions, and an intuitive spaced repetition workflow ("Keep" vs. "Got It").
- Blazing-Fast Zero-Latency Engine:
Engineered in C++ and Swift for instant responsiveness. Decoded in-memory heading caches deliver 300ms live typing results across dozens of dictionaries simultaneously—with zero seek lag.
- Complete Format Freedom (EPWING & MDict):
Import your own EPWING and MDict (.mdx/.mdd) archives with ease, or get started immediately with free built-in downloadable dictionaries. Full support for subbooks, multi-book simultaneous search, embedded audio, and rare Kanji / Gaiji rendering.
- Retro Electronic Dictionary Aesthetics:
Relive the golden age of dedicated electronic dictionaries. Choose from authentic Green CRT, Plasma Amber, Blue Workstation, LCD, or E-Ink display styles, paired with custom bitmap typography (EtchedUD font) and subtle scanlines.
- Unified Apple Ecosystem:
Native apps crafted for iOS, iPadOS, macOS, and Apple Watch. Synchronize your bookmarks and history effortlessly across all your devices via iCloud.
*Note on Apple Intelligence: AI features run on-device and require iOS 26+ / macOS 26+ on compatible Apple Silicon hardware (iPhone 15 Pro, iPhone 16 series, or M-series Macs/iPads). On other devices, all offline dictionary lookups, EPWING/MDict archives, audio, flashcards, and retro themes remain fully operational.*
Ratings & Reviews
- iPhone Duo & Foldable Dual-Screen Support: Adaptive 50:50 hinge split, draggable divider, and seamless rotation caching.
- Apple Intelligence & Private Cloud Compute (PCC): On-demand deep reasoning, diagnostic readiness status, and dynamic suggestion chips.
- Refined Japanese Kana and Chinese Pinyin Search: Enhanced Hepburn Kana conversion and full tone/tone-free Pinyin with Hanzi character matching.
- Audio Playback & Search Stability: Reliable on-demand pronunciation playback, history selection fixes, and optional launch auto-focus.
- Other minor bug fixes and performance improvements.
The developer, editoy Inc., 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- editoy Inc.
- Size
- 23.7 MB
- Category
- Reference
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 12.0 or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
English and 4 more
- English, Japanese, Korean, Simplified Chinese, Traditional Chinese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Full Unlock (All Devices) $7.99
- Copyright
- © 2026 editoy Inc.
