# OtoFlash: AI Audio Flashcard — Native Pronunciation Practice

> AI audio flashcards for native pronunciation practice and language learning. (iPhone/iPad app by Koji Minoda.)

- Source: https://appshunter.io/ios/app/otoflash-ai-audio-flashcard/id6740526880 (this page in markdown: same URL + `.md`)
- Developer: [Koji Minoda](https://appshunter.io/developer/1790413869)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 67 MB
- Languages: English, Japanese
- Released: 2025-04-16
- Data updated: 2026-06-01
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/otoflash-ai-audio-flashcard/id6740526880/reviews.md

## What is OtoFlash?

■ Learn any language using high-quality AI speech
OtoFlash revolutionizes language learning with cutting-edge AI voice technology. Create flashcards with natural, high-quality audio that sounds like a native speaker!

■ Hear the difference
Traditional flashcard apps use robotic text-to-speech that doesn't sound natural. OtoFlash harnesses advanced AI to generate crystal-clear, human-like pronunciation for authentic learning.

■ Key Features:
- Advanced AI Speech: Learn with natural-sounding voices in 25+ languages
- Image Scanning: Create flashcards instantly by taking photos of textbooks or notes
- Audio Streaming: Listen to your flashcards on repeat for immersive learning
- Study Streaks: Track your progress and maintain motivation
- Multiple Study Modes: Practice listening, translation, and more

■ Perfect for:
- Language learners at any level
- Students preparing for exams
- Travelers wanting to learn key phrases
- Anyone looking to improve pronunciation

Whether you're learning everyday phrases or specialized vocabulary, OtoFlash helps you master both the meaning and natural pronunciation.

■ The power of sound learning

"Oto" means "sound" in Japanese - the perfect description for an app that helps you remember through the power of hearing. Studies show that listening to correct pronunciation significantly improves language retention and speaking ability.
Download OtoFlash today and experience the future of language learning with AI-powered audio flashcards!

Terms of Use: This application is licensed under the standard Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- AI-generated native pronunciation
- Image scanning for flashcard creation
- Audio streaming for immersive learning
- Study streaks for motivation
- Multiple study modes
- Support for 25+ languages

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| 6 Months Premium | $14.99 | per 6 months |
| Monthly Premium | $3.99 | per month |


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/otoflash-ai-audio-flashcard/id6740526880/reviews.md

### 1/5 — いきなり全て消えた

*2026-01-16, version 2.2.2*

300以上の単語や例文を入れたのに、いきなりアプリが消えて、再ダウンロードしてら中身全部消えてて終わった。

### 5/5 — 音声のクオリティが高い

*2026-01-02, version 2.2.0*

他のアプリに比べて音声のクオリティが高いので、音から暗記していくのにとても助かっています。

### 5/5 — 素晴らしい。

*2025-07-03, version 1.6.3*

ネイティブ音声で外国語を話してくれるアプリを丁度探していました。語学勉強の聞き流しで活用したいと思います。助かります。

### 5/5 — 最高です

*2025-06-15, version 1.4.4*

まさに探していたアプリでした。読み上げ音声のクオリティが高く、何より、画像スキャンからの自動生成機能が便利すぎます。

リクエストですが、自動再生の機能で、日本語→英語の順で流せる機能を追加いただけるととても嬉しいです。

### 4/5 — ネイティブのような高音質音声！

*2025-06-14, version 1.4.4*

とても使いやすいアプリで、実際に使ってみて感動しています。韓国語を学習していますが、音声が今までの機械的な物とは違い、本当にネイティブが喋っているようなナチュラルさに驚きました！

今まで使っていたフラッシュカードアプリを辞めて、こちらのプレミアムプランで引き続き学習することにしました。

素晴らしいアプリなので、不満や改善点は何もないのですが、一つ要望というかリクエストさせて頂きたいです。AI音声に女性のver.も追加して頂いて、男性と女性の声、好きな方を選べるように設定頂けると、大変ありがたいです。

私自身が女性なので、同性の声だとより発音や抑揚が練習しやすくて助かるなぁと感じています。ご検討よろしくお願い致します。

### 5/5 — シンプルだけど超便利！暗記がはかどる

*2025-05-13, version 1.4.4*

英単語の暗記に使ってますが、本当に使いやすいです！
自分が覚えたい単語をどんどん追加できて、それだけでも便利なのに、訳が自動で入力される機能がすごすぎます。入力の手間が省けるので、テンポよく単語を登録できます。
カードをめくる感覚も直感的で気持ちいいし、覚えた単語はどんどん整理できるのも◎。
語学勉強をしている人にはぜひおすすめしたいアプリです

### 5/5 — 写真の読み取りで、訳を自動生成してくれるので効率的

*2025-04-21, version 1.3*

フラッシュカードの生成や暗記を通勤時間で気軽にできるので、TOEICの勉強で使っています。

問題を解いていて、間違えた文章や単語を暗記するために、自分で英語と日本語訳をすべて書いて単語帳を作っていたのですが、時間がかかるのでこのアプリを使ってみました。

単語や文章の写真を取り込むと、自動で訳して暗記カードを生成してくれるのでかなり負担が減って、暗記に注力できるようになりました。学生時代にもこういう機能があったら効率よく勉強できたのにな〜と思いました。
音声付きで流れてくれるのも嬉しいポイントです。

## Frequently asked questions about OtoFlash

### What is OtoFlash?

OtoFlash is an AI-powered application that uses advanced speech technology to help users learn languages. It creates flashcards with natural, native-sounding audio for pronunciation practice and language retention.

### How does OtoFlash's AI speech differ from other apps?

Unlike traditional apps that use robotic text-to-speech, OtoFlash employs cutting-edge AI to generate crystal-clear, human-like pronunciation, offering a more authentic learning experience.

### Can I create my own flashcards in OtoFlash?

Yes, OtoFlash features image scanning that allows you to instantly create flashcards by taking photos of textbooks or notes.

### What study modes are available in OtoFlash?

OtoFlash offers multiple study modes to cater to different learning preferences, including practice for listening and translation, among others.

### Does OtoFlash have ads?

No, OtoFlash does not contain advertisements. It is an ad-free application.

### What are the subscription options for OtoFlash Premium?

OtoFlash offers a Monthly Premium subscription for $3.99/month and a 6 Months Premium subscription for $19.99/6 months. Both plans include a 3-day free trial.

### On which devices can I use OtoFlash?

OtoFlash is available for iPhone, iPad, and iPod, indicated by its compatibility with iOS devices.

### How often is OtoFlash updated?

The latest version of OtoFlash is 2.2.4, and it was last updated on February 15, 2026, suggesting regular updates to improve the application.

## Version history (last 5 releases)

### 2.2.8 — 2026-05-06

Minor update

### 2.2.4 — 2026-02-15

Minor update

### 2.2.2 — 2026-01-06

Minor update

### 2.2.0 — 2025-11-29

In this update, we have introduced a new Spaced Repetition System (SRS). When you take a flashcard test, the AI analyzes your proficiency and presents questions at the optimal time for you.

### 2.1.0 — 2025-10-17

Added a new feature to move and copy cards.

## Apps similar to OtoFlash

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [PhrasePro: AI Flashcards](https://appshunter.io/ios/app/phrasepro-ai-flashcards/id6535590142) | — | Free | Education |
| [発音英単語帳-しゃべって記憶強化。自動ループ再生可](https://appshunter.io/ios/app/id6475912716) | — | Free | Education |
| [AI Vocabulary Book, AI Word B](https://appshunter.io/ios/app/ai-vocabulary-book-ai-word-b/id6461420201) | — | Free | Education |
| [AI Vocabulary Book (Multiling](https://appshunter.io/ios/app/ai-vocabulary-book-multiling/id6462388172) | — | Free | Education |
| [Flashcards for Fluency](https://appshunter.io/ios/app/flashcards-for-fluency/id6743016619) | 5.0 (1) | Free | Education |
| [【聞き流し】英単語＆英熟語6200](https://appshunter.io/ios/app/6200/id6657983464) | — | Free | Education |

## More apps by Koji Minoda

- [Cognitive Shuffling Nem Sleep](https://appshunter.io/ios/app/cognitive-shuffling-nem-sleep/id6745964044)
- [Native Voice Check: AI Speech](https://appshunter.io/ios/app/native-voice-check-ai-speech/id6752515948)
- [診察のきろく - 診察メモを録音でAIが要約・文字起こし](https://appshunter.io/ios/app/ai/id6758099265)

All apps by Koji Minoda: https://appshunter.io/developer/1790413869

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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 2026-06-01.*