# 1secDic: Offline AI Dictionary — EPWING, MDict & Flashcards

> Fast, customizable dictionary reader for EPWING and MDict collections. (iPhone/iPad app by editoy Inc..)

- Source: https://appshunter.io/ios/app/1secdic-offline-ai-dictionary/id6759234827 (this page in markdown: same URL + `.md`)
- Developer: [editoy Inc.](https://appshunter.io/developer/1191725361)
- Category: Reference, Education
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.0 · 23 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-03-31
- Data updated: 2026-10-25
- Monetization: free with in-app purchases

## What is 1secDic?

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.*

## Key features

- Blazing-Fast EPWING/MDict Engine
- AI Chat powered by Apple Intelligence
- Multi-Platform Support (macOS, iOS, iPadOS, Apple Watch)
- Retro Aesthetic (Vintage Mode)
- Precise Rendering of special characters
- Instant Access with search history and bookmarks
- Integrated Text-to-Speech (TTS)

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Unlock (All Devices) | $7.99 | one-time |


## Is 1secDic safe?

Not enough ratings yet to assess 1secDic.

## Is 1secDic legit?

1secDic: Offline AI Dictionary appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for 1secDic is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Frequently asked questions about 1secDic

### What is 1secDic?

1secDic is a modern and high-performance dictionary reader designed for language enthusiasts. It allows for instant searches across large EPWING and MDict collections with a customizable interface.

### Does 1secDic have ads?

Yes, 1secDic contains advertisements. As a free application with in-app purchases, it utilizes ads to support its development and distribution.

### What platforms does 1secDic support?

1secDic offers a fully native experience on macOS, iOS, iPadOS, and Apple Watch, allowing for seamless study across all your Apple devices.

### Can 1secDic read EPWING and MDict files?

Yes, 1secDic features a blazing-fast engine specifically optimized for high-speed searches across both EPWING and MDict(.MDX) dictionary formats.

### Does 1secDic offer AI features?

Yes, 1secDic includes AI Chat powered by Apple Intelligence, available on iOS/macOS 26+ and supported hardware, enhancing its utility for language research.

### What is the rating of 1secDic?

1secDic has a perfect rating of 5.0 stars based on 1 review, indicating a highly positive user reception.

### Is 1secDic suitable for offline use?

While the app itself is available offline, the AI Chat feature powered by Apple Intelligence may require an internet connection to function.

### How often is 1secDic updated?

The latest version of 1secDic is 1.2.3, and it was last updated on August 9, 2026. This suggests a recent and active development cycle.

## Version history (last 5 releases)

### 1.3.1 — 2026-10-24

- 支持 iPhone Duo 及折叠双屏布局：中缝 50:50 自适应双栏视图、可微调分割栏，旋转与折叠切换平滑无白屏。
- Apple Intelligence 与 Private Cloud Compute (PCC)：支持按需云端深度推理、设备就绪状态诊断横幅与动态后续建议。
- 优化日语假名与中文拼音检索：精细化赫本式假名转换，全面支持带调/无调拼音及汉字单字候选匹配。
- 发音音频播放与搜索稳定性增强：语音按需自动重载、修复历史记录点选加载、新增启动自动聚焦搜索。
- 其他多项细节优化与已知问题修复。

### 1.3.0 — 2026-10-08

Version 1.3.0 brings exciting new learning tools and intelligent AI enhancements:

- Interactive Flashcard Quiz Mode: Transform your bookmarks and search history into an active-recall flashcard deck featuring flipping cards, auto-scrolling marquee cards, and a spaced mastery workflow.
- Apple Intelligence Upgrades: Smarter AI chat with on-demand cloud reasoning and dynamic follow-up suggestion chips.
- Ultra-Fast In-Memory Search: Instant live typing response accelerated to 300ms with zero-latency in-memory heading caches across all your enabled dictionaries.
- Enhanced Retro CRT Aesthetics: Refined Green CRT, Plasma Amber, and Blue Workstation themes with custom bitmap typography and scanline textures.
- General stability improvements and bug fixes.

### 1.2.3 — 2026-08-09

- Added vintage color theme (Blue Workstation)
- Other bug fixes

### 1.2.2 — 2026-08-01

- Improved synchronization functionality

### 1.2.1 — 2026-07-25

[macOS, iOS, watchOS] Flashcard quiz game for History and Bookmarks
[watchOS] Various bug fixes

## Apps similar to 1secDic

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [FlashcardDict](https://appshunter.io/ios/app/flashcarddict/id6762287923) | 5.0 (1) | Free | Reference |
| [MDX Reader:Personal Dictionary](https://appshunter.io/ios/app/mdx-readerpersonal-dictionary/id6756669176) | 5.0 (1) | Free | Reference |
| [WoDict](https://appshunter.io/ios/app/wodict/id6747629179) | — | Free | Reference |
| [WristDict](https://appshunter.io/ios/app/wristdict/id6760006502) | — | Free | Reference |
| [OpenMDict](https://appshunter.io/ios/app/openmdict/id6759032057) | 4.5 (4) | Free | Reference |
| [Ultimate Guide to Phrasal Verb](https://appshunter.io/ios/app/ultimate-guide-to-phrasal-verb/id1052570188) | — | $0.99 | Reference |

## More apps by editoy Inc.

- [Editoy NoteSheet](https://appshunter.io/ios/app/editoy-notesheet/id1191725362)
- [TubeToDo — Focused Video Lists](https://appshunter.io/ios/app/tubetodo-focused-video-lists/id1435607778)
- [1secNote: Markdown & Prompter](https://appshunter.io/ios/app/1secnote-markdown-and-prompter/id6476831073)
- [SubFloat: Multiple Subtitles](https://appshunter.io/ios/app/subfloat-multiple-subtitles/id6759848487)

All apps by editoy Inc.: https://appshunter.io/developer/1191725361

## Related topics

[mdict](https://appshunter.io/ios/topics/mdict)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-25.*