Comparison

PDF OCR vs Undetectable AI

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

Head to head
About

PDF OCR

This app offers a comprehensive suite of tools for managing PDF files. It allows you to extract text using OCR, convert PDFs to images, secure documents with passwords, and merge or split files. It also enables creating PDFs from images and converting webpages into PDF format, all while ensuring your data remains private through offline processing.

Highlights
  • Extract text with OCR
  • Convert PDF to images
  • Secure PDFs with passwords
  • Merge or split PDFs
  • Create PDFs from images
  • Convert webpages to PDF
  • Compress file size
Features
Read full description

PDF OCR turns your iPhone and iPad into a complete PDF workspace: scan paper into searchable PDFs, read and mark up any PDF, and fix files with a full set of tools. Everything runs on your device. SCAN TO PDF • Point the camera at a page; edges are found and the page is straightened for you • Scan many pages in one go, then reorder, rotate or remove them • Text is recognized automatically, so scans are searchable and selectable • Reads QR codes and puts both sides of an ID card on one page READ AND MARK UP • Pen, highlighter, text highlight, underline and strikethrough • Notes, shapes, arrows, stamps and your saved signature • Select anything you added to move or resize it • Reorder, rotate, insert and delete pages • Search, contents and bookmarks, night mode and read aloud ALL YOUR PDF TOOLS • Recognize text (OCR) in scanned PDFs • Make files smaller • Merge PDFs and images, split by pages, ranges or every N pages • Convert PDF to images, text and RTF, and web pages to PDF • Add or remove passwords and permissions PRIVATE BY DESIGN Your documents never leave your device. Scanning, text recognition and summaries run on the device, with no account. PDF OCR PRO Pro adds OCR without page limits, advanced split, redaction that removes content for good, watermarks and page numbers, Face ID lock, smart file names for scans, on-device summaries and translation, and Shortcuts actions. Choose monthly, yearly (with a 7-day free trial) or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and can be managed in Settings › Apple Account › Subscriptions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://layerz.app/pdfocr/privacy

About

Undetectable AI

Transform AI-generated text into natural, human-like writing that bypasses AI detectors. This tool helps ensure your content remains authentic and undetectable by major detection systems. It also includes a built-in AI scanner to verify your text before submission.

Highlights
  • Bypass AI detection instantly
  • Humanize any text
  • Built-in AI detector
  • One-tap humanization
  • Advanced rewriting models
  • Preserve original meaning
Features
Read full description

Undetectable brings humanizing, AI text analysis, and everyday writing tools into one focused workspace. Rewrite a draft, review how it reads, and see what changed before you copy the result. HUMANIZE YOUR WRITING Turn stiff or repetitive AI-assisted drafts into smoother, more conversational text. Choose a tone, select a rewriting strength, and refine wording for essays, emails, articles, captions, and more. CHECK AI-LIKE WRITING SIGNALS Analyze text for patterns associated with AI-generated writing. Review an estimated human-likeness score, explore writing signals, and identify passages that may deserve a closer edit. Results are estimates, not proof of who wrote the text. COMPARE EVERY CHANGE Switch between your original text, the rewritten version, and highlighted changes. See what was adjusted while keeping control over your final message. MAKE IT SOUND LIKE YOU Create a personal writing voice from samples of your own writing. The app uses those examples to guide word choice, sentence length, and style in future rewrites. MORE WAYS TO IMPROVE TEXT • Paraphrase and reword • Fix grammar • Summarize long text • Shorten wordy paragraphs • Expand ideas • Translate into 20 languages BUILT FOR YOUR WORKFLOW Paste or type text, import a file, or use the scan option. Save work in your library, revisit recent drafts, and copy finished text when you're ready. Available for iPhone, iPad, and Mac, with layouts designed for each screen. Whether you're polishing an email, editing an article, or making an AI-assisted draft feel more personal, Undetectable helps you write with greater clarity and control. Important: AI detection scores are probabilistic indicators and should not be used as the sole basis for judgments about authorship. Note: Some features require Premium subscription - Weekly Monthly and annual plans available - Subscription auto-renews unless canceled - Cancel anytime Settings By subscribing, you agree to the app's Terms of Use and Privacy Policy: - Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - Privacy Policy: https://lixuslink.com/privacy-policy-2/

Screenshots

PDF OCR4 screens
Undetectable AI4 screens

Verdict

The call

The clearest difference is review sentiment: PDF OCR at 100% against Undetectable AI's 0%. PDF OCR also leads on monetization model (free vs free with in-app purchases) and update cadence (every 3 weeks vs every 2 months). 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. PDF OCR sells 3 in-app purchases, starting at $3.99 per month and Undetectable AI sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PDF OCR ships an update every 3 weeks, Undetectable AI every 2 months. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.

Scorecard3 real differences · 7 level
PDF OCR versus Undetectable AI: the parameters behind the verdict, then further details
ParameterPDF OCRUndetectable AI
PriceFreeFree
Rating4.4 (7 ratings) — better—
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings7 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better17.6
Further details — not scored
Size7 MB14 MB
Age rating17+4+
DeveloperLayerz Corp.HAMZA HARDOULI

Customer experience

PDF OCR

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Undetectable AI

Written reviews7 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

3 purchases

PDF OCR

Subscriptions2
  • PDF OCR Pro Monthly$3.991 Month
  • PDF OCR Pro Yearly7 Days trial$19.991 Year
One-time1
  • PDF OCR Pro Lifetime$49.99
2 purchases

Undetectable AI

Subscriptions2
  • Undetectable AI Premium$3.991 Month
  • Undetectable AI Premium7 Days trial$24.991 Year

Questions

Is PDF OCR free?
PDF OCR is free to download, with in-app purchases available.
Is Undetectable AI free?
Undetectable AI is free to download, with in-app purchases available.
Do PDF OCR or Undetectable AI have ads?
Neither PDF OCR nor Undetectable AI shows ads.
Which is updated more often, PDF OCR or Undetectable AI?
PDF OCR ships an update every 3 weeks, and Undetectable AI every 2 months. Most recently, PDF OCR was updated on October 25, 2026 and Undetectable AI on October 20, 2026.

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