Comparison

PDF OCR vs Zhizhi

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

Zhizhi

This app uses AI to provide instant, one-minute podcast-style explanations of academic terms and content on each page of your documents. It acts like a personal tutor, making complex papers and lectures more accessible.

Highlights
  • AI-powered explanations
  • One-minute summaries per page
  • Academic term clarification
  • Document content analysis
  • Personalized tutor experience
Read full description

Open a lecture slide or an academic paper, and with each new page, you’re left puzzled—so many unfamiliar academic terms make it difficult to follow. At times like this, having a personal tutor to explain each page to you in just one minute would make the document much easier to understand. Zhizhi provides AI experts across various industries, ready in the top-right corner of every new page in your document to generate AI-powered podcast explanations of the content on that page!

Screenshots

PDF OCR4 screens
Zhizhi4 screens

Verdict

The call

The clearest difference is rating: Zhizhi at 5.0 against PDF OCR's 4.4. Zhizhi also leads on device support (4 vs 2) and iOS requirement (12.0 vs 17.0). PDF OCR's advantage is ratings volume (7 vs 2). On price, ads, in-app purchases and monetization model 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.

ReceptionRating · Positive reviews · Number of ratings

Zhizhi holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 7 and 2 respectively.

Scorecard4 real differences · 6 level
PDF OCR versus Zhizhi: the parameters behind the verdict, then further details
ParameterPDF OCRZhizhi
PriceFreeFree
Rating4.4 (7 ratings)5.0 (2 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings7 — better2
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS17.012.0 — better
Further details — not scored
Size7 MB38 MB
Age rating17+4+
DeveloperLayerz Corp.CoreSpeed Inc.

Customer experience

PDF OCR

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

Zhizhi

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

PDF OCR

No in-app purchases

None

Zhizhi

No in-app purchases

Questions

Is PDF OCR free?
PDF OCR is free to download, with no in-app purchases.
Is Zhizhi free?
Zhizhi is free to download, with no in-app purchases.
Which has better reviews, PDF OCR or Zhizhi?
Zhizhi is rated higher. PDF OCR averages 4.4 out of 5 from 7 ratings, while Zhizhi averages 5.0 from 2 ratings.
Do PDF OCR or Zhizhi have ads?
Neither PDF OCR nor Zhizhi shows ads.

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