HeyDay - AI English Diary
Writing practice & flashcards
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
HeyDay 2.0 is here! Get instant corrections on your English diary, plus 4,000 flashcards and lock screen learning. Build an English habit in 5 minutes a day.
Write a little, get corrected, and make it yours. HeyDay turns a daily English diary into real progress.
■ Instant corrections
• Smart Check fixes common learner mistakes, like tenses and prepositions, right on your phone and for free.
• AI correction polishes every sentence so it sounds natural, and suggests expressions that fit your diary.
• Every fix comes with a short explanation in your language.
• Stuck on a word? Write it in your own language and HeyDay turns it into English.
■ Easy diary writing
• A new "Today's idea" prompt every day gets your first sentence going.
• Pick a mode: one line, three lines, gratitude or free writing.
• Not in the mood to type? Write by voice.
■ Make it stick
• Listen to your diary, then practice the corrected sentences with Shadowing and Copy out.
• Review quizzes built from your own mistakes
• A weakness report shows the mistakes you make most.
• Save expressions and feedback to Words and review them with the meanings hidden.
■ 5 minutes a day in the Learn tab
• 4,000 flashcards: everyday conversation, phrasal verbs, business English, and words for daily life, travel and the TOEIC
• Every card comes with a short example sentence.
• Pick your level and go through cards with "I know it" or "Show again".
■ English on your lock screen
• Lock screen widgets and Live Activities show you an expression every time you pick up your phone.
• Home screen word widgets and a word-of-the-day notification keep words in sight.
■ See your progress
• A calendar that fills up as you write, plus streaks and streak freezes
• A stamp book that grows with every finished diary
• Ghost league: race against your own past weeks
• Monthly and yearly recap cards
• Time capsule: rewrite a diary from a month or a year ago and compare
■ Your diary stays private
• Your diary is stored on your phone.
• On supported devices, AI corrections run on the device, too.
• Your diary is never used to train AI.
■ HeyDay Premium
• Unlimited AI corrections on any device
• Diaries up to 2,000 characters (500 on the free plan)
• Choose your correction level
• Smart review with 5 quiz types, an all-time weakness report and mini lessons
• My-sentence widget
• Unlimited translation helper, pronunciation, Shadowing and Copy out
• Text from photos and cloud backup
• 3 streak freezes a month and no ads
• Monthly or yearly subscription, or a one-time lifetime purchase
The free plan includes Smart Check, AI corrections on supported devices (3 a week), the Learn tab, Words and lock screen learning.
Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
HeyDay 2.0 is a whole new app.
• A fresh design that's easier to read
• Smart Check: instant, free fixes for common mistakes, right on your phone
• 3 free AI corrections every week on supported devices
• Write words you don't know in your own language and get them in English
• New Learn tab with 4,000 flashcards
• Lock screen learning with widgets and Live Activities
• Review quizzes from your own mistakes, plus a weakness report
• Shadowing, Copy out and pronunciation practice
• Stamp book, Ghost league, recap cards and Time capsule
• A 7-day free trial of Premium and a new lifetime plan
The developer, Hayble, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Hayble
- Size
- 153.7 MB
- Category
- Education
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
English and 14 more
- English, French, German, Indonesian, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Premium Monthly $3.99
- Premium Lifetime $69.99
- Premium Yearly $39.99
- Copyright
- © 2025 Hayble Inc.