Comparison

Atomic KB vs Kioku

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Atomic KB

Features
Read full description

Atomic is a client for your self-hosted Atomic knowledge base. It connects to your own server to give you mobile access to your notes, saved articles, and semantic search. Save any web page from Safari or any browser using the Share Extension โ€” Atomic automatically extracts the article content, generates embeddings, and connects it to your existing knowledge. Features: - Browse, create, and edit markdown notes - Save web articles from any app via the Share Extension - Semantic and hybrid search across your knowledge base - Hierarchical tag browsing - Offline support with local caching - Connect via QR code or manual setup Requires a self-hosted Atomic server. Learn more at https://github.com/kenforthewin/atomic

About

Kioku

Features
Read full description

Kioku is a personal knowledge library for Mac. Save articles, PDFs, websites, and your own Markdown notes into organized vaults you can read, search, annotate, and keep with you offline. Use Kioku to turn scattered research into a calm, durable library. Paste a URL to archive a single page, save a PDF from your Mac, or crawl more of a site when you want a deeper reference vault. Kioku stores your content as Markdown with downloaded assets, so your library stays portable and readable outside the app. Write your own notes with a focused Markdown editor, add images, create internal links, and keep authored notes separate from saved web pages. While reading, select passages to save excerpts and notes so important ideas do not disappear after the first pass. Kioku also includes optional local AI features for summaries, retrieval, chat, and study cards. Supported models run on your Mac, keeping those experiences local to your device. Features: Save articles, PDFs, pages, and websites into Markdown vaults Read saved content offline in a native Mac interface Write and edit Markdown notes Organize saved pages into vaults Search your library Annotate passages and save excerpts Generate summaries with optional on-device AI Create study cards from saved pages and notes Store content in a local or iCloud Drive-backed folder Keep your library portable with Markdown files and assets Kioku is for readers, researchers, students, builders, and anyone who wants a quieter place to collect what matters.

Screenshots

Atomic KB4 screens
Kioku4 screens

Verdict

The call

The clearest difference is update cadence: Kioku at every 2 days against Atomic KB's every 2 months. Atomic KB's advantage is iOS requirement (15.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Atomic KB ships an update every 2 months, Kioku every 2 days. The most recent releases landed on October 5, 2026 and October 31, 2026 respectively.

Scorecard2 real differences ยท 4 level
Atomic KB versus Kioku: the parameters behind the verdict, then further details
ParameterAtomic KBKioku
PriceFreeFree
Update frequencyEvery 2 monthsEvery 2 days โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS15.0 โ€” better26.0
Further details โ€” not scored
Size6 MB51 MB
Age rating4+4+
DeveloperFoldspace Labs LLCKai Kang

In-app purchases

None

Atomic KB

No in-app purchases

None

Kioku

No in-app purchases

Questions

Is Atomic KB free?
Atomic KB is free to download, with no in-app purchases.
Is Kioku free?
Kioku is free to download, with no in-app purchases.
Do Atomic KB or Kioku have ads?
Neither Atomic KB nor Kioku shows ads.
Which is updated more often, Atomic KB or Kioku?
Atomic KB ships an update every 2 months, and Kioku every 2 days. Most recently, Atomic KB was updated on October 5, 2026 and Kioku on October 31, 2026.

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