Sentrio: Learn English
3 sentences a day, made yours
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Learn three English sentences a day. Read the explanations, check your understanding, listen and speak along, then write from memory. A placement test helps you find a suitable starting level.
Hi, Grammar is a 38-chapter book that explores the questions behind everyday English. Browse the contents, save bookmarks, adjust the type size and pick up where you left off. English examples and translations have distinct colors and a clean layout. The book is included in the app for offline reading.
Chapter 1 and the preface are free. One purchase unlocks lifetime access to all chapters and the glossary of Hi, Grammar within this app only. The purchase covers reading the book, not any other services. It is not a subscription. Daily English practice remains free.
Choose Japanese, English, Simplified Chinese, Traditional Chinese, Korean, French, Italian or Spanish inside the app. AI-assisted practice requires an internet connection. Download the voice once to listen to English sentences offline. Learning history and backups stay on your device.
Privacy Policy: https://everyday.wandernovainc.com/privacy
Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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We revised all eight language editions of Hi, Grammar, including the introduction, all 38 chapters and the glossary. Explanations are clearer and more natural, with more precise grammar guidance.
The developer, 咏冬 王, 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 Linked to You
The following data may be collected and linked to your identity:
- Purchases
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 咏冬 王
- Size
- 86.4 MB
- Category
- Education
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 7 more
- English, French, Italian, Japanese, Korean, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Hi, Grammar Lifetime $9.99
- Copyright
- © 2026 Yongdong Wang