Comparison

BookViewer vs 猫耳ビューアー

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

Head to head
About

BookViewer

Features
Read full description

BookViewerは、PDFファイルや画像フォルダ(ZIP)を読み込み、Kindleのようにスワイプで読めるリーダーアプリです。 【主な機能】 ■ 本棚(ライブラリ) インポートした本を一覧表示。サムネイルとタイトルで管理できます。 ■ ファイルの追加 「+」ボタンから、PDF・ZIP・画像フォルダを選択して追加。 ■ 読書画面 ・左右スワイプでページめくり(Kindle風) ・画面タップでメニュー表示/非表示(閉じる・シークバー) ・下のスライダーで好きなページへジャンプ ・ページ数・進捗を表示 ■ 読み方の切り替え ・左開き:一般的な本のように左から右へ ・右開き:漫画のように右から左へ(ボタンで切り替え) ■ 画像の拡大 画像の本では、ピンチやダブルタップで拡大・縮小できます。 ■ 続きから読む 最後に開いたページを自動保存。次に開いたときは続きから読めます。 【対応形式】 ・PDF(.pdf) ・ZIP(中身の画像を連番で表示) ・画像フォルダ(画像が入ったフォルダをそのまま選択可能)

About

猫耳ビューアー

Features
Read full description

NekomimiViewer is a media viewer built for browsing deep image, video, and PDF libraries exactly as they are organized on disk. Point it at a local folder or a NAS (SMB share) you choose, and it becomes your media library—no import, no upload. ■ Highlights - Fast browsing of deeply nested libraries Even huge folder trees scroll smoothly in grid view. Deep chains of sparse folders are automatically flattened into a single readable view. - Direct NAS (SMB) connection Add your NAS and stream videos and PDFs straight from it—no need to download entire files to your device first. - Images, video, PDF, and audio in one app The built-in viewer handles a wide range of video formats including MKV and AVI (FFmpeg bundled), two-page spread PDF reading, and thumbnail grids for images. - Mini player for watching while you browse Keep a video or track playing in a small window while you explore the library. Playback continues in the background, with repeat, shuffle, and lock screen controls. - Works as a music library Audio tags (title, artist, album art) are read automatically. Switch to the music list view to sort by track number or tag. - Downloads for offline viewing Save files from your NAS to the device and view them offline. Interrupted transfers resume where they left off. - Automatic thumbnails Generated and cached entirely on your device—first frame for video, first page for PDF. - Full-text search (file name and path) Fast search across the whole library. Folder paths can optionally be included in the search. - Favorites, star ratings, and history Mark the files you open often and jump straight back to them from your history. - Tuned per folder Grid, list, and music list view modes are remembered per folder. Rename roots for display, and act on items from the long-press menu. ■ Privacy - No personal information or usage data is collected—ever - No tracking, no analytics, no ads, no account required - All files, thumbnails, and favorites are processed and stored on your device only - The only network traffic is reading media from the NAS (SMB share) you registered ■ Who it's for - Anyone who wants to browse a photo or video collection stored on a NAS from an iPhone or iPad - Anyone who wants to stream a music library kept on a NAS - Anyone who reads local PDF libraries in two-page spreads - Anyone who values privacy and would rather not hand their data to an external server NekomimiViewer is completely free with no ads. See the bundled license notices and the published privacy policy for details.

Screenshots

BookViewer4 screens
猫耳ビューアー2 screens

Verdict

The call

The clearest difference is device support: 猫耳ビューアー at 4 against BookViewer's 2. On price, ads, in-app purchases and iOS requirement 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.

Scorecard1 real difference · 5 level
BookViewer versus 猫耳ビューアー: the parameters behind the verdict, then further details
ParameterBookViewer猫耳ビューアー
PriceFreeFree
Update frequency—Every 4 days
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS16.015.0 — better
Further details — not scored
Size2 MB43 MB
Age rating4+4+
Developerjun muraseMakoto Nishimura

In-app purchases

None

BookViewer

No in-app purchases

None

猫耳ビューアー

No in-app purchases

Questions

Is BookViewer free?
BookViewer is free to download, with no in-app purchases.
Is 猫耳ビューアー free?
猫耳ビューアー is free to download, with no in-app purchases.
Do BookViewer or 猫耳ビューアー have ads?
Neither BookViewer nor 猫耳ビューアー shows ads.

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