Comparison

PDF Reader vs Similar Plus

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

Head to head
About

PDF Reader

This app offers a superior PDF reading experience with its innovative Liquid Mode, which optimizes documents for mobile screens. It also provides robust tools for annotating, signing, managing, and sharing your PDF files, catering to both work and study needs.

Highlights
  • Liquid Mode for optimized mobile reading
  • Annotation tools (pencil, text, highlighting)
  • Handwritten signature insertion
  • File management (move, merge, copy, delete)
  • Cloud service integration (Wondershare, iCloud)
  • Create blank PDFs and folders
Features
Read full description

PDFelement - PDF Reader is a PDF reader using the latest technology. The newly connected Liquid Mode function allows you to enjoy the best reading experience. In addition, there are various annotation tools, file management, signature, Various functions such as cloud services can meet your PDF needs in work and study. PDF VIEWER • Liquid Mode gives you the best PDF reading experience • Star files to find them quickly • Easily locate recently accessed files in the "Recent" list. • Enter the page number to navigate to the desired page for viewing LIQUID MODE • Get the best PDF Reading experience with Liquid Mode • PDF document fully fits the mobile phone screen, no need to zoom in and out repeatedly. • Easily adjust brightness, font size,style, and spacing. ANNOTATE • Using Pencil to annotate like writing on the paper • Add text annotations, freely modify the text and background, border colors, choose the appropriate font and font size. • Supports many annotating tools like highlighting, underlining, squiggly lines, or strikethroughs. MANAGE • Move, merge, copy or delete files SIGNATURE • Enables handwritten signatures to be inserted anywhere within the document, while also offering the ability to zoom in and out for greater flexibility. • Built-in commonly used stamps CREATE • Quickly create completely blank PDF documents • Creat blank folders. SHARE • Sharing document content with others is just a click away with capture feature. • Select sentence(s) or pragraph(s) to share CLOUD SERVICE • PDF Reader supports uploading or downloading docs via computer, Wondershare document cloud and iCloud. Please note that this app only supports editing native PDF files. It does not support editing scanned or raster PDF. If you find you cannot edit text in PDF, please check if it is scanned PDF. Thank you! ---------------------------------------------------------------------------------------- Need HELP? Please contact us! We'll feedback to you ASAP. Email: pdfelement@wondershare.com Support Center: http://support.wondershare.com Forum: http://forum.pdf.wondershare.com Official Website: https://pdf.wondershare.com If you think this App helps you, your positive review in the App Store would be much appreciated.

About

Similar Plus

Read full description

Secure offline PDF, Docx, Xlsx, Pptx & Text Compare, Export with Advanced Clipboard Management - Ad-Free Google's Gemini AI as a collaborative assistant. Similar Plus offers robust local file comparison, powerful multi-clipboard storage, and easy text editing, all while keeping your documents securely on your device – no internet uploads required. UNRIVALED OFFLINE DOCUMENT PROCESSING Similar Plus turns your device into a powerful, secure analysis tool. •Deep PDF & Office Extraction: Go beyond simple text. Our built-in engine locally extracts content from PDF, Word, Excel, and PowerPoint files. Your documents are never uploaded. •Fast, Private, & Secure: By processing everything offline, we guarantee your sensitive data remains on your device. It's the perfect solution for confidential work. •AI & RAG Optimized: The extracted text is clean and well-structured, making it ideal for use with AI models to build powerful, accurate Retrieval-Augmented Generation (RAG) engines. Key Features: * Compare Files & Clipboard: Analyze differences between two PDFs, text files, or pasted clipboard content. * Side-by-Side Visual Comparison: View differences clearly and sync scrolling to identical content sections. * Secure Offline PDF Processing: Our built-in PDF processor extracts text locally on your device. * Convert PDF to Text: Easily save PDF content as editable text files. * Convert Office Document (Word, Excel, PowerPoint) to Text: Easily save content as editable text files. * Advanced Multi-Clipboard: * Store up to 30 persistent clipboard entries. * Easily save, edit, shortcuts, assign and load clipboard data. Improvement: * Support PDF 1.3 to 2.0 and multi-character sets. Performance may vary with other PDF versions or complex layouts/languages. * We are committed to improving Similar Plus! Please contact us via (support@thinkwider.co) if you encounter any issues or have suggestions. We apologize for any inconvenience these limitations may cause and appreciate your understanding. Terms of Use: [Standard Apple Terms of Use (EULA)] https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PDF Reader4 screens
Similar Plus4 screens

Verdict

The call

The clearest difference is price: PDF Reader at Free against Similar Plus's $149.99. Similar Plus's advantage is update cadence (every 11 days vs every 2 months) and iOS requirement (13.0 vs 15.0). On 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

PDF Reader is free to download; Similar Plus costs $149.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PDF Reader ships an update every 2 months, Similar Plus every 11 days. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

Scorecard3 real differences · 7 level
PDF Reader versus Similar Plus: the parameters behind the verdict, then further details
ParameterPDF ReaderSimilar Plus
PriceFree — better$149.99
Rating4.3 (3.9K ratings) — better—
Positive reviews76.7% of reviews—
Number of ratings3.9K — better—
Update frequencyEvery 2 monthsEvery 11 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.013.0 — better
Further details — not scored
Size173 MB21 MB
Age rating4+4+
DeveloperWondershare Technology (Hunan) Co.,Ltd.Thinkwider CO., LTD.

Bugs and requests

PDF Reader

Reported bugs

4 issues
  • Text boxes appearing randomly
  • Inability to select/edit text in some PDFs
  • Scrolling issues and page loading delays
  • Incompatibility with certain PDF formats

Requested features

5 requests
  • Ability to edit text formatting (font, size, color)
  • Support for multiple open documents
  • Improved Apple Pencil integration
  • Bookmark/favorite feature for frequently used PDFs
  • Expanded cloud storage integration (OneDrive, Google Drive, etc.)

Similar Plus

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

PDF Reader

No in-app purchases

None

Similar Plus

No in-app purchases

Questions

Is PDF Reader free?
PDF Reader is free to download, with no in-app purchases.
Is Similar Plus free?
Similar Plus costs $149.99, with no in-app purchases.
Do PDF Reader or Similar Plus have ads?
Neither PDF Reader nor Similar Plus shows ads.
Which is updated more often, PDF Reader or Similar Plus?
PDF Reader ships an update every 2 months, and Similar Plus every 11 days. Most recently, PDF Reader was updated on October 14, 2026 and Similar Plus on October 4, 2026.

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