Hachimo
Memory for AI English Practice
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Keep the mistakes and words you learn with ChatGPT or Claude, review them before they fade, and always know what to practice next.
Do your English lessons with ChatGPT or Claude keep starting from zero?
Hachimo is the learning memory for your AI English practice. It keeps the mistakes, corrections, and words you choose to save, brings them back before you forget, and turns your history into the next focused 5–20 minute plan.
YOUR AI TEACHES. HACHIMO REMEMBERS.
Keep conversations, corrections, and drills in ChatGPT or Claude, the tools you already use. Hachimo organizes what came out of each lesson so your next session can continue from where the last one ended.
ONE CLEAR NEXT STEP
Hachimo prioritizes due reviews, lessons in progress, and the next activity. Adjust today’s plan to the five, ten, fifteen, or twenty minutes you actually have.
REVIEW YOUR OWN MISTAKES
Corrections, vocabulary, and useful expressions saved through the AI connection become a searchable Memory. Spaced review brings them back at the right time.
PROGRESS BASED ON REAL PRACTICE
See completed lessons, saved Memory, learning-stage items, consistency, and recent lesson evidence based on what you actually did.
WIDGET AND NOTIFICATIONS
The "Hachimo Today" widget on the Home Screen and Lock Screen shows your streak, today's lesson, and review cards at a glance. When your AI delivers a new lesson, Hachimo lets you know (if notifications are on).
Hachimo is for you if you:
• practice speaking or writing with ChatGPT or Claude
• want to stop repeating the same mistakes
• are tired of copying everything into a separate flashcard app
• need a useful routine that fits into a few minutes
HACHIMO PRO IS REQUIRED
Using the app and connecting ChatGPT or Claude requires Hachimo Pro (monthly or yearly). The yearly plan starts with a free trial for eligible new subscribers; after the trial, the yearly price is charged. The trial length, price, and terms are shown on the purchase screen.
If you purchase a subscription, payment is charged to your Apple Account. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel your subscription in your App Store account settings.
Terms: https://mcp.hachimo.protoductai.com/terms
Privacy: https://mcp.hachimo.protoductai.com/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The ChatGPT connection button now reads "Open chatgpt.com" and opens chatgpt.com.
The developer, ProtoductAI株式会社, 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
- Contact Info
- User Content
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- User Content
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- PROTODUCTAI K.K.
- Size
- 30.9 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Hachimo Pro 年額 $22.99
- Hachimo Pro Yearly $29.99
- Hachimo Pro Monthly $3.99
- Copyright
- © 2026 ProtoductAI K.K.