When a two-hour video can be understood in minutes, you can take in many of them in a fraction of the time you would spend watching one. Discover new ones, and free up your hours for what matters. Seimai lifts the time limit off YouTube.

SMART SUMMARIES

With Seimai's Smart Summary strategies, every video becomes a well-structured piece in the creator's own voice, not just a list of bullet points. A short introduction sets the scene, then clear sections you can skim or open up, at a length that matches the video. Written by AI from the full transcript, with the original always one tap away.

YOUR DAILY FEED

Follow channels
New videos from the channels you follow arrive as Smart Summaries automatically, with a notification when each one is ready. The first 2 channels are free; more with a subscription.

Discover channels worth following
Suggested channels with a line on what each is about, picks from great channels dropped into your feed, and links to share a channel or a whole set of channels with a friend.

Follow channels in any language
Creators in English, Spanish, Portuguese, French, German, Italian, Chinese, Japanese and Korean, all summarised in your language. The app itself speaks those nine languages too.

GO DEEPER WHEN IT MATTERS

Summarise any video
Search for a video in Seimai, paste a YouTube link, or pick one from any channel's page. Your first 5 summaries each month are free; more with a subscription.

Ask questions
Chat about a video, with answers grounded in what it actually says. The first 50 messages each month are free; more with a subscription.

Choose your depth
Concise, Normal or Detailed. Choosing the level is available on Pro and Max; Free and Lite use Normal.

KEEP WHAT MATTERS

Highlight and keep
Highlight any passage and save it as a note. Notes are sorted automatically into a personal knowledge base you can browse and search.

Share what you find
Publish your notes, follow other people, and browse the notes they share.

PLANS

Free — 5 summaries, 2 channels and 50 chat messages a month. Normal detail level.

Lite — 20 summaries, 10 channels and 150 chat messages a month. Normal detail level.

Pro — 100 summaries, 25 channels and 500 chat messages a month. All detail levels.

Max — 500 summaries, 50 channels and unlimited chat. All detail levels.

Discovery, translations, notes and sharing are included on every plan, including Free.

New accounts get 21 days of full Pro access, free and with no payment details required. When it ends the account moves to the Free plan — nothing is charged unless you choose to subscribe.

Lite, Pro and Max are monthly subscriptions billed through Google Play. Prices are shown in the app and can be cancelled any time in your Google Play account.

GOOD TO KNOW

Summaries and translations are generated by AI from each video's transcript, and can contain mistakes — check anything important against the original video.

Seimai does not host, download or re-upload videos. Every summary links back to the source video on YouTube.

Privacy policy: https://seimai.app/privacy
Terms of service: https://seimai.app/terms
Contact and abuse reports: support@seimai.app