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Acornonaut

Turns YouTube videos and playlists into timestamp-cited spaced-repetition flashcards, exportable to Anki or readable through an API.

From $9/moActively maintained

Creative & mediaFree tier
acornonaut.app ↗
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At a glanceswept Oct 21, 2026

not read yet

Use

For
learners who want to keep what they watch in long YouTube videos, through spaced-repetition flashcards
Price
From $9/mopricing page, read Oct 24, 2026
Activity
Actively maintainedsite updated 6 days ago
Runs as
API
Used for
  • turn YouTube lectures and playlists into spaced-repetition flashcards
  • review cards daily and check each source timestamp in the video
  • export flashcards to Anki, Obsidian or CSV
read off acornonaut.app on Oct 24, 2026
Worth knowingcomputed from what we read · each with its source
  • Has an MCP server (1 in the registry)public registry →
Pricingpricing page, read Oct 24, 2026

From $9/mo

pricing page

How a program reaches itfound, not claimed · read Oct 24, 2026

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Creative & mediaby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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Three tools from the Atlas for the job you describe, each with what fits and what does not.

From people who use itnot part of the reading

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Questions this page answers
  • What is Acornonaut?

    Turns YouTube videos and playlists into timestamp-cited spaced-repetition flashcards, exportable to Anki or readable through an API. It is listed in the Atlas under Creative & media.

  • Who is Acornonaut for?

    learners who want to keep what they watch in long YouTube videos, through spaced-repetition flashcards

  • How much does Acornonaut cost?

    Paid plans start at $9/mo, per Acornonaut's pricing page on 2026-10-24.

  • Do people use Acornonaut?

    Little sign of use.

  • Is Acornonaut still maintained?

    Actively maintained: site updated 6 days ago.

  • What are alternatives to Acornonaut?

    In Creative & media, by use: Everpop, EngrAmo, Vixdeo, Feedtomind.com, Lukija, Adobe.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk