Comparison

Osushi vs nook

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

Head to head
About

Osushi

Features
Read full description

機能 - iOS Osushiに投稿された記事の閲覧 - 記事のお気に入り登録 - お気に入りに登録するとオフラインでも閲覧できます 本アプリはOSSです。 ソースコードはGitHub上のリポジトリから確認でき、閲覧や貢献できます。 https://github.com/ios-osushi/Osushi-iOS

About

nook

Features
Read full description

Read collected technical articles and research papers cleanly on your devices. This app is a companion reader designed to work alongside the Mac version of nook. Feed registration, folder organization, article polling, and AI summarization are handled in the Mac app. Synced articles and briefings appear on your iPhone and iPad via iCloud for a quiet reading experience on the go. Using sync requires signing in with the same Apple Account on both your Mac and iOS devices. Everything syncs privately through your personal iCloud storage (private database). No proprietary account is required. ■ Built for Technical Reading - Native Markdown: Clean hierarchy, structured lists, tables, inline code, and block quotes. - LaTeX Math Rendering: Crisp rendering of mathematical formulas and equations in research papers and articles. - Expandable Image Viewer: Tap or pinch to zoom into architecture diagrams, charts, and technical figures. - In-App Video Playback: Watch demonstration and technical videos directly within articles (streamed on demand). ■ Briefings and Citations - Topic Overviews: Review key topics summarized across multiple articles in a feed or folder. - Interactive Citations: Tap citation links to jump directly to referenced excerpts and source articles. ■ Organization and Offline Access - Filter by Folders and Feeds: Filter articles by synced feeds and folders. - Fast Search: Instantly search articles by title and list preview text. - Automatic Offline Caching: Automatically caches the last 30 days of articles, images, and your favorites for offline reading on planes or subways. - Two-Way Favorite Sync: Starred articles sync across your devices. ■ Language Settings - The app UI language can be set independently under Settings to System, Japanese, or English (changing the UI language does not retranslate existing saved articles). - The language used for AI summaries, briefings, and Ask responses is determined by the settings in the Mac app. Getting Started - This app cannot register feeds, create or edit folders, poll articles, or generate AI summaries and briefings on its own. These operations are performed in the Mac app. - Data sync utilizes your personal iCloud storage. - Even without a Mac or before syncing, you can test core reading features—including article layout, math and figure rendering, image zoom, search, and favorites—using 3 built-in sample technical articles (briefings, video playback, and iCloud sync are not included in sample mode). Completely free. No in-app purchases, no subscriptions, no ads, and no user tracking.

Screenshots

Osushi3 screens
nook3 screens

Verdict

The call

The clearest difference is update cadence: nook at daily against Osushi's every 6 days. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Osushi ships an update every 6 days, nook daily. The most recent releases landed on October 9, 2026 and September 25, 2026 respectively.

Scorecard1 real difference · 5 level
Osushi versus nook: the parameters behind the verdict, then further details
ParameterOsushinook
PriceFreeFree
Update frequencyEvery 6 daysDaily — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size2 MB16 MB
Age rating4+12+
DeveloperKaito MuraokaKohei Ono

In-app purchases

None

Osushi

No in-app purchases

None

nook

No in-app purchases

Questions

Is Osushi free?
Osushi is free to download, with no in-app purchases.
Is nook free?
nook is free to download, with no in-app purchases.
Do Osushi or nook have ads?
Neither Osushi nor nook shows ads.
Which is updated more often, Osushi or nook?
Osushi ships an update every 6 days, and nook daily. Most recently, Osushi was updated on October 9, 2026 and nook on September 25, 2026.

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