Comparison

O vs PDFAI Scan

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

Head to head
About

O

Features
Read full description

OBD II DONGLE是一套裝置軟體,能夠對著車裝傳感器進行燒錄,並且替換傳感器的ID號碼,裝置採用藍牙無線溝通技術,此APP必須搭配橙的電子所生產之OBD II DONGLE應用裝置所使用,可以使用QRCODE掃描ID,或者手動輸入ID來進行傳感器燒錄以及ID COPY

About

PDFAI Scan

Transform your device into a smart document scanner with AI-powered study tools. Easily scan, convert, and enhance documents, then leverage AI for summaries, flashcards, and interactive quizzes. Listen to documents read aloud and share your work in various formats.

Highlights
  • AI-powered document scanning
  • OCR text extraction
  • AI study tools (summaries, flashcards, quizzes)
  • Text-to-Speech functionality
  • Export to PDF, Word, Text, Images
  • iCloud sync across devices
Features
Read full description

“PDFAI Scan - Document Scanner” turns your iPhone and iPad into a smart document scanner with AI-powered study tools. Take a photo, import from your gallery, or open any PDF. The app makes your documents clearer and helps you learn from them. ◆ Easy Scanning ‣ Snap photos with your camera or choose images from your gallery ‣ Automatic document edge detection ‣ Scan single pages or multi-page documents ‣ Import PDFs, Word documents, and PowerPoint slides ◆ Photo to PDF ‣ Convert photos (JPG, PNG) into clean, high-quality PDF documents ‣ Enhance text and images for better readability ‣ Extract text from scans in 26+ languages (OCR) ‣ Smart naming automatically gives your documents helpful titles ◆ AI Study Tools ‣ AI Summary – Get key points from any document in seconds ‣ AI Flashcards – Automatically create study cards from your notes ‣ AI Quiz – Test yourself with questions generated from your documents ‣ Chat with PDF – Ask questions and get answers from any document ‣ Fun Mode – Add jokes and humor to make studying more enjoyable ‣ Earn XP and badges as you learn ◆ Listen & Read ‣ Text-to-Speech – Listen to any document read aloud ‣ 150+ voices in many languages ‣ Highlight words as they are read ‣ Great for learning on the go or when your eyes are tired ◆ Save & Share ‣ Export as PDF, Word (DOCX), Text, or images (PNG, JPG) ‣ Save audio files (M4A) to listen to later ‣ Share flashcards in Anki format ‣ Challenge friends with shared quizzes ‣ iCloud sync across iPhone, iPad, and Mac ◆ Premium Features ‣ No watermarks on your files ‣ Unlimited AI summaries, flashcards, and quizzes ‣ More accurate text recognition ‣ Work with multiple files at once ‣ Access to all voices and export options ‣ Priority customer support ◆ Works Everywhere ‣ Supports 32+ languages including English, Spanish, French, German, Chinese, Japanese, Korean, Vietnamese, Arabic, Hindi, and more ‣ Supports right-to-left languages like Arabic and Hebrew ‣ Optimized for iPad with sidebar navigation ‣ Supports VoiceOver, larger text, and haptic feedback ◆ Privacy First ‣ Scanning and text recognition happen on your device ‣ AI features ask for your permission before use ‣ Your documents remain private ‣ Location tagging is optional Perfect for receipts, homework, notes, forms, books, and important documents. Whether for school, work, or home, “Photo to PDF: PDFAI Scan” makes scanning and studying simple. Download “PDFAI Scan - Document Scanner” today and turn any document into a powerful learning tool. PDFAI Premium ‣ Weekly $3.99 · Monthly $4.99 · Annual $39.99 (save up to 80%) ‣ 7-day free trial with the monthly plan ‣ Prices are in USD and may vary by country ‣ Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period ‣ Payment is charged to your Apple ID upon confirmation of purchase ‣ Manage or cancel your subscription anytime in Account Settings ‣ Any unused portion of a free trial will be forfeited when you purchase a subscription ‣ EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

O3 screens
PDFAI Scan4 screens

Verdict

The call

The clearest difference is in-app purchases: O at none against PDFAI Scan's 3. O also leads on iOS requirement (11.0 vs 16.0). PDFAI Scan's advantage is update cadence (every 6 weeks vs every 3 months). On price, ads 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. PDFAI Scan sells 3 in-app purchases, starting at $3.99 per 7 days. O asks for nothing beyond the download.

UpkeepUpdate frequency

O ships an update every 3 months, PDFAI Scan every 6 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
O versus PDFAI Scan: the parameters behind the verdict, then further details
ParameterOPDFAI Scan
PriceFreeFree
Rating—5.0 (7 ratings) — better
Positive reviews—50.0% of reviews
Number of ratings—7 — better
Update frequencyEvery 3 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS11.0 — better16.0
Further details — not scored
Size34 MB69 MB
Age rating4+4+
DeveloperOrange ElectronicDuc Lai

In-app purchases

None

O

No in-app purchases

3 purchases

PDFAI Scan

Subscriptions3
  • PDFAI Scan Premium Weekly$3.997 Days
  • PDFAI Scan Premium Monthly7 Days trial$4.991 Month
  • Premium Account(1 year)$39.991 Year

Questions

Is O free?
O is free to download, with no in-app purchases.
Is PDFAI Scan free?
PDFAI Scan is free to download, with in-app purchases available.
Do O or PDFAI Scan have ads?
Neither O nor PDFAI Scan shows ads.
Which is updated more often, O or PDFAI Scan?
O ships an update every 3 months, and PDFAI Scan every 6 weeks. Most recently, O was updated on October 29, 2026 and PDFAI Scan on October 30, 2026.

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