Seimai
Extract the essence
Free · In‑App Purchases
Turn long videos into clear, structured summaries. Follow channels, highlight what matters, and ask AI about any video.
Seimai turns YouTube videos into clear, structured summaries — so you can absorb the essence of an hour-long video in a few minutes of reading.
Seimai is free to download and use, with monthly limits on the free plan. A subscription raises those limits (see Plans below).
Summaries, your way
Paste any YouTube link or search inside the app to get a structured summary with sections and key points — 5 free summaries per month, more with a subscription. Summaries are generated at a Normal reading depth; Pro and Max subscribers can also switch to Concise or In-depth. Read any summary in your language with automatic translation, included on every plan.
Follow your channels
Subscribe to your favorite channels and new uploads are summarized for you automatically, with a push notification when a summary is ready — up to 2 channels on the free plan, more with a subscription. Your feed becomes a reading list of everything worth knowing.
Ask follow-up questions
Chat with an AI assistant about any video — clarify a concept, dig into a claim, or get context beyond the transcript. Includes 50 free chat messages per month, more with a subscription.
Highlight and remember
Select any passage to save it as a note, organized automatically into your personal knowledge base. Add your own thoughts, and keep everything searchable in one place. Included on every plan.
Share what you learn
Publish notes to the community, follow other readers, and discover what people are highlighting across topics you care about. Included on every plan.
Plans
Seimai is free to download. The free plan includes 5 AI summaries per month, following up to 2 channels, and 50 AI chat messages per month, at Normal detail. To do more, an auto-renewing subscription is required:
• Lite — 20 summaries/mo, 10 channels, 150 chat messages/mo
• Pro — 100 summaries/mo, 25 channels, 500 chat messages/mo, plus Concise & In-depth detail levels
• Max — 500 summaries/mo, 50 channels, unlimited chat, plus Concise & In-depth detail levels
Subscriptions are billed to your Apple Account and auto-renew unless cancelled at least 24 hours before the end of the period. Manage or cancel anytime in your Apple Account settings. Prices are shown in-app before purchase.
Seimai (精米) is Japanese for "rice polishing" — removing the husk to get to what matters. That's what we do with videos.
Terms of Use (EULA): https://seimai.app/terms
Privacy Policy: https://seimai.app/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, SW6 Ltd, 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
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SW6 LTD
- Size
- 12 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Infrequent
Cartoon or Fantasy Violence
Realistic Violence
Profanity or Crude Humor
Mature or Suggestive Themes
Horror/Fear Themes
Medical Treatment information
Alcohol, Tobacco, Drug Use or References
Sexual Content or Nudity
Guns or Other Weapons
Contains
User-Generated Content
Health or Wellness Topics
Social Media
- In-App Purchases
Yes
- Seimai Max $8.99
- Seimai Pro $6.99
- Seimai Lite $3.99
- Copyright
- © 2026 SWT LTD