Comparison

BOOKSCAN Checker vs RetrieverX

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

Head to head
About

BOOKSCAN Checker

Scan book ISBN barcodes with your iPhone or iPod Touch camera to retrieve book and publisher information. It's designed for books that are out of copyright, public domain, or for which you have obtained permission to use.

Highlights
  • Scan ISBN barcodes using device camera
  • Display book information
  • Display publisher information
  • Supports iPhone, iPad, and iPod Touch
  • Free to download and use
Read full description

BOOKSCAN Checkerは、iPhone/iPod Touchのカメラで書籍のバーコード(ISBN)を読み込み、書籍に関する情報や出版者の情報を表示することが出来ます。BOOKSCANでは、著作権が切れているもの、著作権フリーのもの、著作権者から同意を得ているもの、ご自身が著作権を有している書籍のみ受け付けており、その際 著作権が有効な書籍の場合には必ず、こちらのアプリでご確認後、出版者情報から著作権者を特定し、お問い合わせの上、許可を得てBOOKSCANへお申込みください。 ※ご注意ください。 ISBNコードを取得する際、本にはバーコードが2つ記載されています。上部に印字されているバーコードがISBNコードになりますので。下のバーコードは手で隠すなどして上部のバーコードのみ読み込んでください。 冊数分はあくまで目安です。小冊子がある場合は、+1冊分となります。

About

RetrieverX

Features
Read full description

RetrieverX は、よく見るWebサイトの情報を自分好みに整理して閲覧できるホワイトリスト型ブラウザアプリです。 CSS、XPath、JsonPath、正規表現などを使ったルールを設定するだけで、Webページから必要な情報だけをピックアップ。テキスト・画像・PDF・動画など、さまざまなコンテンツをすっきり見やすく表示します。 お気に入り登録や閲覧履歴はもちろん、表示カスタマイズやセキュリティ機能も搭載。毎日の情報チェックがもっと快適になります。 あなただけのルールで、Web上の情報をスマートに管理しましょう。 RetrieverX is a whitelist browser app that lets you organize and view your favorite websites just the way you like. Simply set up rules using CSS selectors, XPath, JsonPath, regular expressions, and more to extract exactly the information you need from web pages. View text, images, PDFs, videos, and other content in a clean, organized layout. With built-in favorites, browsing history, display customization, and security features, your daily information routine becomes effortless. Create your own rules and enjoy a smarter way to manage web content. --- -サブスクリプション- サブスクリプションのご利用に際して、下記のプライバシーポリシーおよび利用規約をご参照ください。 1.プライバシーポリシー https://retriever-app.github.io/Retriever.app/privacy-policy.html 2.利用規約 https://retriever-app.github.io/Retriever.app/terms-of-service.html -Subscription- Before subscribing, please refer to our Privacy Policy and Terms of Service: 1. Privacy Policy https://retriever-app.github.io/Retriever.app/privacy-policy.html 2. Terms of Service https://retriever-app.github.io/Retriever.app/terms-of-service.html

Screenshots

BOOKSCAN Checker4 screens
RetrieverX3 screens

Verdict

The call

The clearest difference is in-app purchases: BOOKSCAN Checker at none against RetrieverX's 3. BOOKSCAN Checker also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.6). RetrieverX's advantage is update cadence (weekly vs every 4 months). On price 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. RetrieverX sells 3 in-app purchases, starting at $1.99 per month. BOOKSCAN Checker asks for nothing beyond the download.

UpkeepUpdate frequency

BOOKSCAN Checker ships an update every 4 months, RetrieverX weekly. The most recent releases landed on October 23, 2026 and October 10, 2026 respectively.

Scorecard4 real differences · 4 level
BOOKSCAN Checker versus RetrieverX: the parameters behind the verdict, then further details
ParameterBOOKSCAN CheckerRetrieverX
PriceFreeFree
Positive reviews9.1% of reviews—
Update frequencyEvery 4 monthsWeekly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size6 MB45 MB
Age rating4+17+
DeveloperBOOKSCAN Inc.Daichi Hayashi

In-app purchases

None

BOOKSCAN Checker

No in-app purchases

3 purchases

RetrieverX

Subscriptions3
  • Basic Monthly14 Days trial$1.991 Month
  • Standard Monthly14 Days trial$3.991 Month
  • Premium Monthly14 Days trial$4.991 Month

Questions

Is BOOKSCAN Checker free?
BOOKSCAN Checker is free to download, with no in-app purchases.
Is RetrieverX free?
RetrieverX is free to download, with in-app purchases available.
Do BOOKSCAN Checker or RetrieverX have ads?
RetrieverX shows ads; BOOKSCAN Checker does not.
Which is updated more often, BOOKSCAN Checker or RetrieverX?
BOOKSCAN Checker ships an update every 4 months, and RetrieverX weekly. Most recently, BOOKSCAN Checker was updated on October 23, 2026 and RetrieverX on October 10, 2026.

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