# HeyDay - AI English Diary — 일기 쓰기로 시작하는 손쉬운 영어 습관

> AI-powered English diary for daily language practice and feedback. (iPhone/iPad app by Hayble.)

- Source: https://appshunter.io/ios/app/heyday-ai-english-diary/id6766733677 (this page in markdown: same URL + `.md`)
- Developer: [Hayble](https://appshunter.io/developer/1829451434)
- Category: Education, Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 15.5 · 97 MB
- Languages: Korean, German (Germany), Russian, Vietnamese, European Spanish, American English, Italian, Indonesian, Japanese, Chinese (Traditional, Hong Kong SAR China) and 4 more
- Released: 2026-06-11
- Data updated: 2026-07-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/heyday-ai-english-diary/id6766733677/reviews.md

## What is HeyDay?

■ Experience English becoming more familiar with just one diary sentence a day

You don’t have to write perfectly every day.
Even if you simply open the app and read “Today’s Thought,” a beautiful footprint will be added to your personal achievement map.
When you have a little more time and write a diary entry, the space will be filled with a deeper color.
Drop by casually, like stamping a daily attendance check, and enjoy filling up your own English progress board.

■ On days when even typing feels like too much, just speak your thoughts out loud

When you don’t feel like writing, try using the Voice Input feature.
The sentences you speak are automatically converted into text, helping you practice speaking and writing at the same time.

■ Receive 1:1 AI native-style feedback that even explains nuance

Stop relying on lifeless machine-translated English. Start recording your daily life in English and build real skills from today.
HeyDay corrects not only grammar mistakes, but also refines your sentences into natural native-style expressions that fit the situation.
Experience 1:1 tutoring that kindly explains even the subtle differences in nuance.

■ Make it truly yours with Re-writing Practice & Vocabulary List

Don’t just read the feedback and forget it right away. Practice re-writing to make it stick.
Rewrite corrected sentences yourself based on the feedback,
save the key expressions you learned today in your own vocabulary list, and review them until they become completely yours.

■ Zero data collection for AI training, complete privacy protection

Worried that your precious daily thoughts and private stories might be used to train an AI model?
HeyDay never collects or uses your diary data to improve AI performance or for external training purposes.
Your diary stays in a thoroughly encrypted private space, so you can safely write your honest thoughts in English.

Download HeyDay now and start building an English habit that naturally fits into your daily life without pressure.

[HeyDay Premium]
- Remove ads
- Write unlimited diary entries
- Expand the maximum diary character limit
- Choose AI correction level
- OCR correction, text scan
- Detailed and precise correction with high-performance AI


Terms of Use : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Daily diary writing for English practice
- AI-powered grammar and nuance correction
- Voice input for spoken practice
- Re-writing exercises
- Personalized vocabulary list
- Private and secure diary storage

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/heyday-ai-english-diary/id6766733677/reviews.md

### 5/5 — 귀차니즘에게 추천하는앱

*2026-06-22*

원래는 지피티로 검색해가면서 영어 일기 썼는데 찾아보는 게 은근 귀찮아서 지속이 안되더라구요,, 앱으로 하니까 훨씬 간편해서 좋내요ㅋ

### 5/5 — 직장인 영어 공부하기 좋은어플!!!!!

*2026-06-18*

하루하루 일하기 바빠서 영어학원 다닐 시간도 체력도 없는데 ㅜ 날마다 짧게라듀 영어일기 쓰니까 공부되서 넘 좋타 바쁜 직장인들은 꼭 써보세요 강추 매일 일기 주제도 있어서 가볍게 주제 읽고 데일리로 글쓰기 넘 좋은거 같음
첨삭도 해주고 관련된 주제로 쓸 수 있는 표현들도 밑에 쭉 나와서 확실히 공부되는 느낌남

### 5/5 — 일기쓰기 최고의 어플

*2026-06-18*

일기쓰는걸 좋아한다면 적극 추천! 첨삭도 해주고 음성 작성도 가능해요 ㅎㅎ 추천합니다

### 5/5 — 영어일기 어플 찾아보는 중에

*2026-06-18*

디쟌이 이뻐서 다운받았는데 피드백도 잘해주구 만족도가 높아서 결국 구입했습니다~~ 좋아용

### 5/5 — 개인적으로 말해보카나 스픽 듀오링고보다 나은듯..? (가성비 기준)

*2026-06-18*

영어공부 걍 여러 어플로 꾸준히 하는 편인데 새로 나와서 함 써봄. 일기라서 부담스러웠는데 주제를 줘서 할말이 없진 않음(이건 좋은듯?) 글고 갠적으로 좋다고 생각한건 말로 술술 말하면 알아서 일기장에 써주고 첨삭해주는 형식이라 회화에 작문까지 한번에 공부하는 느낌이라 가성비 ㄱㅊ은듯 ㅎ (한달에 사오천원 정도?) 일기는 매일 쓰는거라 눈에 보이게 위젯같은 게 있으면 좋을 것 같은데 아직 그건 안되는 것 같아서 좀 아쉬움

## Frequently asked questions about HeyDay

### How does HeyDay help me learn English?

HeyDay encourages daily English practice through diary writing. It provides AI-powered feedback on grammar, natural phrasing, and nuance, helping you build real skills. You can also practice re-writing corrected sentences and save new vocabulary to your personal list.

### Can I use HeyDay offline?

The provided data does not specify offline functionality. However, features like AI feedback and voice input typically require an internet connection to process.

### What kind of AI feedback does HeyDay offer?

HeyDay offers 1:1 AI native-style feedback that goes beyond basic grammar correction. It refines your sentences for natural, situationally appropriate expressions and explains subtle nuances, similar to a personal tutor.

### Is my diary data safe with HeyDay?

Yes, HeyDay prioritizes privacy with zero data collection for AI training. Your diary data is stored in a thoroughly encrypted private space, ensuring your personal stories remain secure and are not used for external training purposes.

### What are the benefits of HeyDay Premium?

HeyDay Premium offers an ad-free experience, unlimited diary entries, an expanded character limit, adjustable AI correction levels, and OCR correction for text scanning. It provides more advanced and precise correction with high-performance AI.

### What devices is HeyDay available on?

HeyDay is available on iPhone, iPad, and iPod, as indicated by its compatibility with iOS devices. The app is rated for ages 4 and up.

### How often is HeyDay updated?

The latest version of HeyDay was released on June 11, 2026, with the version number 1.0. This suggests it is a new application, and future updates will likely occur to introduce new features and improvements.

### Does HeyDay have ads?

No, HeyDay is ad-free. The 'HeyDay Premium' subscription explicitly mentions removing ads as a benefit, indicating the free version may contain advertisements.

## Version history (last 1 release)

### 1.0 — 2026-06-11

No release notes.

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All apps by Hayble: https://appshunter.io/developer/1829451434

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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 2026-07-24.*