# Word Defense: Blue Hole Diver — Learn words by playing a game

> Learn words by playing a game (iPhone/iPad app by sanghui lee.)

- Source: https://appshunter.io/ios/app/word-defense-blue-hole-diver/id6808081166 (this page in markdown: same URL + `.md`)
- Developer: [sanghui lee](https://appshunter.io/developer/1721270552)
- Category: Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 36 MB
- Languages: American English
- Released: 2026-09-07
- Data updated: 2026-11-01

## What is Word Defense?

"Learn words, defend the sea!"
Word Defense: Blue Hole Diver is an edutainment game that blends vocabulary learning with tower defense, set in the mysterious deep-sea world of the Blue Hole and drawn in beautiful 16-bit retro pixel art.

Dive into the Blue Hole to learn essential vocabulary, then spend the gold you collect on sea-creature towers to fend off the monsters rising from the deep!

■ Key Features

1. Essential core vocabulary in multiple languages
- Spanish (everyday essentials based on corpus frequency)
- Japanese (high-frequency words from modern conversation and media)
- Korean (everyday essentials for Korean learners)
- English (top words based on NGSL 1.2, for Korean-interface users)
- Switch your learning language anytime from the main screen

2. Step-by-step diving lessons by depth
- Levels grouped in sets of 10 words, each level one meter deeper
- Clear one level at a time and explore further into the deep
- High-quality native TTS pronunciation on every word

3. Sea-creature towers full of personality
- Clownfish (10G): steady range and balanced fire rate (2.0s)
- Pufferfish (20G): long-range sniper covering a wide area (1.6s)
- Giant Octopus (50G): rapid close-range strikes that shred narrow chokepoints (0.9s)
- Combine each tower's range ring and traits to build the best defense line

4. Natural, reliable real-time review
- Each time you defeat a monster, the word you learned and its meaning pop up above it for a second
- Native TTS speaks the word at the same moment, so you review listening and meaning instantly
- Overlap control keeps speech clear even in the heat of battle

■ Recommended for
- Anyone bored by flashcards and rote memorization
- Players who want to grow their Spanish, Japanese, or Korean vocabulary while having fun
- Fans of retro pixel art and the tower defense genre
- Anyone who wants light, quick vocabulary review on the commute

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 광고 제거 | $1.99 | one-time |


## Is Word Defense safe?

Not enough ratings yet to assess Word Defense.

## Is Word Defense legit?

Word Defense: Blue Hole Diver appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Word Defense is 70 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.0.7 — 2026-10-12

- A word question appears before each wave. Get it right and a Clownfish helper joins you.
- Towers you place now carry over to the next wave. No more rebuilding from scratch.
- At WAVE 2, pick a permanent Clownfish upgrade: attack speed or range.
- The Pufferfish is available to buy from WAVE 3.
- Early waves were rebuilt so each one brings something new.
- A short prep time before enemies arrive lets you place your first tower.
- Clear WAVE 5 to earn a first-rescue crest.

### 1.0.6 — 2026-10-01

- English interface added. Switch languages in Settings.
- Korean added as a learning language (for English-interface users).
- Improved lessons: look at the picture and pick the word in the language you are learning. Tap any choice to hear it.
- Levels are now shown as depth (1m, 2m, ...), and the level map scrolls to your current level.
- New Settings button on the home screen (event codes, remove ads).
- Launch event: enter code DIVE100 to get 100G.
- Tidied up the bottom info bar on the game screen for a wider view.
- Clear a wave to earn a 10G reward.
- Deep-Sea Defense now tells you when you have no gold to spend.

### 1.0.5 — 2026-09-23

- 학습 단어 200개로 확장, 모든 단어에 그림 추가
- 단어 목록 새 구성(생활 단어 중심, 다국어 지원)
- 기존 학습 기록 사용자 안내 추가
- 웨이브 3판 클리어마다 광고가 한 번 표시됩니다
- 광고 제거 상품 추가(한 번 구매하면 계속 유지)

### 1.0.4 — 2026-09-17

- 10웨이브마다 물길 지도가 바뀝니다
- 대왕문어 사거리 확대
- 웨이브 재설계, 타워 단계별 공개
- 바닷가재 갑각 방패, 타워 배치 규칙 개선

### 1.0.3 — 2026-09-15

게임 더 재밌게

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All apps by sanghui lee: https://appshunter.io/developer/1721270552

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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 2026-11-01.*