Comparison

Similar Basic vs PDF Compare & AI Detector

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

Head to head
About

Similar Basic

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*Secure Offline PDF, Document Extract & Compare & Export - Ad-Free* Google's Gemini AI as a collaborative assistant. Similar Basic lets you quickly compare PDF or text files and clipboard content without uploading anything online. Your documents stay local using our built-in PDF processor. Special updates: •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. Key Features: * Compare two files (PDF or text). * Compare text pasted from the clipboard. * Offline PDF Processing: Securely extract text on your device. * Upgrade via In-App Purchase: Unlock multi-clipboard storage with save & edit capabilities. * Compare Docx: Direct compare Docx content. * Compare Xlsx: Direct compare Xlsx content. * Compare Pptx: Direct compare Pptx content. * All-New, Multi-Threaded PDF Engine. * Parallel Extraction for Maximum Performance. * Unmatched Accuracy and Reliability. * Export the Extracted File (limited to 100K bytes). Looking for more? Check out "Similar Plus" for advanced features. Terms of Use: [Standard Apple Terms of Use (EULA)] (https://www.apple.com/legal/internet-services/itunes/dev/stdeula/)

About

PDF Compare & AI Detector

Quickly identify discrepancies between documents and text files. Features synced scrolling, color-coded changes, and a similarity score to streamline reviews of contracts, reports, and AI-generated content. Offers detailed PDF analysis and report generation.

Highlights
  • Fast text/PDF comparison
  • Color-highlight additions & deletions
  • Similarity score (percentage)
  • PDF analysis: metadata, content, style
  • Detect missing text layers and scanned PDFs
  • Generate and share PDF analysis report
Features
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Your helper for working with AI, LLMs, and digital documents. Compare PDFs, Word, DOCX and text files, analyze documents, inspect PDF metadata, check formatting issues, and review AI-related signals before you share, submit or sign. Useful tools to compare, inspect, validate, and review content with confidence. COMPARE PDF, WORD, DOCX & TEXT • Highlight document differences • Check similarity score • Compare images in PDFs • Review changes side by side • Find added, removed and changed content AI SIGNALS / AI DETECTOR REVIEW • Check offline AI/Bot signal score • Review metadata and document properties • Detect unusual document patterns • See triggered signals with explanations The AI Signal Score does not determine whether content was created by AI. It highlights document signals that may require review. STYLE & FORMAT CHECKER • Detect formatting inconsistencies • Identify print cut and page edge risks • Check margins, spacing and text placement • Find long lines and readability issues • Detect excessive blank lines and empty pages PDF SECURITY INSPECTOR • View PDF metadata • Scan PDFs for hidden content • Detect tiny, invisible or unreadable text • Review suspicious links and embedded actions • Check PDF restrictions and permissions • Inspect forms, annotations and signature fields PDF REPORT EXPORT • Export a professional PDF report • Share document analysis results easily • Include AI signals, formatting issues and security findings • Add metadata summaries and key insights • Create reports for audits, reviews and documentation WORKS OFFLINE Document analysis runs offline on your device for enhanced privacy. Results are informational and may be incomplete or inaccurate. The app does not provide legal, forensic, cybersecurity or digital signature validation. USEFUL FOR • Contracts • Reports • Academic papers • Invoices • Resumes and CVs • Technical documents • Legal drafts • AI-generated drafts • Business documents • Before and after document versions PRO FEATURES: Some advanced features may require Pro access, including full PDF analysis, advanced comparison tools, larger document limits, detailed reports and premium document review features. PDF Compare & Analyzer is built for users who need more than a simple PDF viewer. Compare changes, inspect document structure, check metadata, review AI-related signals and analyze files with more confidence. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://tagaev.xyz/pdftextcompate-pp.html Support: info@tagaev.xyz

Screenshots

Similar Basic4 screens
PDF Compare & AI Detector4 screens

Verdict

The call

The clearest difference is iOS requirement: Similar Basic at 15.0 against PDF Compare & AI Detector's 17.6. On price, update cadence, ads and in-app purchases 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. Similar Basic sells 1 one-off in-app purchase and PDF Compare & AI Detector sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on May 17, 2026 and September 20, 2026 respectively.

Scorecard1 real difference · 9 level
Similar Basic versus PDF Compare & AI Detector: the parameters behind the verdict, then further details
ParameterSimilar BasicPDF Compare & AI Detector
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—50.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, Mac
Requires iOS15.0 — better17.6
Further details — not scored
Size22 MB23 MB
Age rating4+12+
DeveloperThinkwider CO., LTD.Marsel Tagaev

In-app purchases

1 purchases

Similar Basic

One-time1
  • Multi-clipboard Storage$13.99
3 purchases

PDF Compare & AI Detector

Subscriptions3
  • Weekly PRO Subscription3 Days trial$1.997 Days
  • Monthly PRO Subscription3 Days trial$3.991 Month
  • Annual PRO Subscription$19.991 Year

Questions

Is Similar Basic free?
Similar Basic is free to download, with in-app purchases available.
Is PDF Compare & AI Detector free?
PDF Compare & AI Detector is free to download, with in-app purchases available.
Do Similar Basic or PDF Compare & AI Detector have ads?
Neither Similar Basic nor PDF Compare & AI Detector shows ads.
Which is updated more often, Similar Basic or PDF Compare & AI Detector?
Similar Basic ships an update every 3 weeks, and PDF Compare & AI Detector every 3 weeks. Most recently, Similar Basic was updated on May 17, 2026 and PDF Compare & AI Detector on September 20, 2026.

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