Comparison

SCAN ACE · PDF Scanner App vs One Scan

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

Head to head
About

SCAN ACE · PDF Scanner App

Transform any document or image into a high-quality digital file. This app offers automatic edge detection, multiple scan modes, and advanced editing tools like OCR, filters, and watermarking. Securely manage, share, and convert your files with ease.

Highlights
  • Automatic document edge detection
  • Document, ID, and Passport scan modes
  • AI OCR for text recognition and copying
  • Professional editing filters
  • Add signatures and watermarks
  • Password protection for PDFs
  • Cloud storage integration
Features
Read full description

Turn a simple scan into perfect results - SCAN ACE Every file and image is consistently captured with clear, high-quality results. Trusted by millions of users worldwide for over a decade. SCAN ACE PROVIDES ALL THE TOOLS FOR DOCUMENTS: FULL FEATURE SCANNER - Automatically detects document edges with no manual angle adjustment required; - Supports Document, ID Card, Passport scan modes, and image to PDF conversion for different needs; - Provides the option to select page size when exporting documents; - Supports JPG, PDF, and image to PDF file formats for sharing ALL IN ONE PDF DOCUMENT EDITOR - Recognizes text in over 20 languages with AI OCR and supports content copying; - Professional filters including Color, Black & White, Photo, Grayscale; - Draw or scan a signature directly into documents; - Highlight important information with a marker. - Add a watermark to documents for protection or labeling. MANAGE & SHARE PDF - Add a password to PDF documents to keep them secure; - Send documents by fax or email, save to files, or upload to Google Drive, OneDrive, Box, and Dropbox; - Adjust PDF pages to reorder, delete, or rotate them; - Convert files to PDF or search PDF documents by keywords to quickly find what you need SUBSCRIPTION DETAILS - Weekly and annual subscriptions are available. - Payment will be charged to your iTunes account at confirmation of purchase. - Your subscription will automatically renew unless auto-renew is disabled at least 24 hours before the end of the current subscription period. - Automatic renewals will be charged at the same price you were originally charged for the subscription. - Subscriptions can be managed by going to Account Settings on the App Store after purchase. SCAN ACE is regularly updated with new features and improvements. If you encounter any issues, please contact us before leaving a review. We are always ready to help and guide you through using the app. If you have a problem or suggestion, please email support@neopixel.biz. You will receive a timely response and solution. Terms of Service: https://neopixel.ai/SCAN-ACE/terms Privacy Policy: https://neopixel.ai/SCAN-ACE/privacy

About

One Scan

Easily scan, convert, and sign documents from your device. Organize your business and personal files with features like auto-detection, flash, and folder management. Edit, e-sign, and share your scanned documents quickly and efficiently.

Highlights
  • Scan documents with auto-detection
  • Convert to PDF instantly
  • E-sign and paraph files
  • Organize with folders and search
  • Share via email and text
  • Import files from cloud storage
Features
Read full description

One Scan turns your iPhone and iPad into a powerful AI scanner. Point, tap, done: documents, receipts, ID cards, books and photos become crisp, searchable PDFs in one tap. Then sign, edit, organize and share them in seconds. Everything you expect from a top scanner app, without the clutter. No settings to fiddle with, no learning curve: One Scan does the hard work for you. SCAN ANYTHING IN ONE TAP - Automatic edge detection, perspective correction and shadow removal - Batch mode: capture dozens of pages in a row and get a single multi-page PDF - Smart filters: color, grayscale, black & white, whiteboard and auto-enhance - Dedicated modes for documents, ID cards (front and back on one page), passports, business cards, books, receipts and photos - Import from Photos, Files, Mail or any app with the Share Sheet - Built-in QR code and barcode reader AI THAT DOES THE BORING PART - OCR text recognition in 100+ languages: copy, search and export the text of any scan - AI summaries and instant answers: ask a question about a contract, an invoice or a report and get the answer - Smart naming and auto-sorting: One Scan reads your document, names it and files it for you - Data extraction: pull dates, totals and vendors from receipts and invoices, ready to export - One-tap translation of scanned text SIGN AND EDIT PDFS - Sign with your finger, Apple Pencil or a saved signature; add initials, dates and text fields - Fill out forms, annotate, highlight, draw, add stamps and watermarks - Reorder, rotate, delete, merge and split pages - Compress files, choose the page size (A4, Letter…) and the margins - Export as PDF, JPG, PNG, TXT or Word ORGANIZE AND FIND EVERYTHING - Folders, tags and favorites - Full-text search inside your scans, powered by OCR - iCloud sync keeps your library up to date on iPhone and iPad - Save to Files, iCloud Drive, Google Drive, Dropbox or OneDrive - Share by Mail, Messages, AirDrop or WhatsApp, or print with AirPrint PRIVATE BY DESIGN - Your scans are processed on your device and stay in your library. No account required - Lock the app and individual documents with Face ID, Touch ID or a passcode - Password-protect PDFs before you share them - No ads, and we never sell your data MADE FOR IPHONE AND IPAD - Full iPad experience: Split View, drag and drop, keyboard shortcuts and Apple Pencil - Home Screen widgets, Siri Shortcuts and a Files extension to scan from anywhere - Optimized for the latest iOS and iPadOS PERFECT FOR Students, teachers, freelancers, small businesses, travelers and remote workers. Anyone who needs to scan contracts, receipts, notes, whiteboards, IDs or old family photos. Terms of Use: https://mwm.ai/legal/scanner/terms-of-use Privacy Policy: https://mwm.ai/legal/scanner/privacy-policy

Screenshots

SCAN ACE · PDF Scanner App4 screens
One Scan4 screens

Verdict

The call

SCAN ACE · PDF Scanner App and One Scan both sit at 4.8 stars, but that hides the real split: 87% of SCAN ACE · PDF Scanner App's written reviews are positive against 26% of One Scan's. SCAN ACE · PDF Scanner App also leads on update cadence (fortnightly vs every 2 months) and chart position (#187 vs unranked). One Scan's advantage is monetization model (freemium vs subscription). On price, rating, 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. SCAN ACE · PDF Scanner App sells 10 in-app purchases, starting at $2.99 per month and One Scan sells 10 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for SCAN ACE · PDF Scanner App against 4.7 for One Scan. Both are backed by a comparable volume of ratings — 39K and 12K respectively. Written reviews are what separate them: 87% of SCAN ACE · PDF Scanner App's written reviews are positive against 26% of One Scan's.

UpkeepUpdate frequency

SCAN ACE · PDF Scanner App ships an update fortnightly, One Scan every 2 months. Both last shipped on September 24, 2026.

Scorecard6 real differences · 5 level
SCAN ACE · PDF Scanner App versus One Scan: the parameters behind the verdict, then further details
ParameterSCAN ACE · PDF Scanner AppOne Scan
PriceFreeFree
Rating4.8 (39K ratings) — better4.7 (12K ratings)
Positive reviews86.8% of reviews — better26.0% of reviews
Number of ratings39K — better12K
Update frequencyFortnightly — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFreemium — better
Best chart rank#187 — better—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better26.0
Further details — not scored
Size126 MB40 MB
Age rating4+4+
DeveloperNEO PIXEL LABS PTE. LTD.App Rover

Customer experience

SCAN ACE · PDF Scanner App

All ratings39,124 ratings
Positive96.7%
Neutral1.1%
Negative2.2%
Written reviews1,987 reviews
Positive86.8%
Neutral3.5%
Negative9.7%

One Scan

All ratings11,765 ratings
Positive91.2%
Neutral2.8%
Negative5.9%
Written reviews208 reviews
Positive26.0%
Neutral6.3%
Negative67.8%

User reviews

SCAN ACE · PDF Scanner App

From 39K App Store ratings

What we love

  • 💻 Easy to use
  • 🚀 Convenient for on-the-go scanning
  • 📁 Effective for organizing and storing documents
  • 🔍 Produces high-quality scans
  • ⚙️ Useful features like color/grayscale options

Room to improve

  • 🐛 Issues with recent updates (e.g., lost folder organization, decreased functionality)
  • 🔍 Quality concerns with some scans
  • 🔒 Unreliable cloud storage integration (Dropbox, Google Drive)
  • 💰 Frustration with subscription model after previous one-time purchase
  • 🤔 Confusing or unintuitive user interface

One Scan

From 12K App Store ratings

What we love

  • 🚀 Fast and easy to use
  • 📸 Excellent image quality
  • 💾 Convenient document storage

Room to improve

  • 🐛 Crashes and stability issues
  • 💰 Expensive subscription model
  • 🔒 Difficulty cancelling subscription

Bugs and requests

SCAN ACE · PDF Scanner App

Reported bugs

3 issues
  • Crashes or freezes during use
  • Issues with batch scanning and document processing
  • Problems with exporting or sharing scanned documents

Requested features

4 requests
  • Restore folder organization and management
  • Improve cloud storage integration and sync
  • Add more customization options for file naming and organization
  • Enhance multi-page scanning and editing capabilities

One Scan

Reported bugs

3 issues
  • App freezes and becomes unresponsive
  • Scans not saving properly
  • Subscription charges continue even after cancellation

Requested features

3 requests
  • Free tier with limited scans
  • Ability to export scans to cloud storage
  • Better customer support and communication

In-app purchases

10 purchases

SCAN ACE · PDF Scanner App

Subscriptions10
  • Premium Plan - Monthly3 Days trial$2.991 Month
  • Premium Plan - Weekly3 Days trial$4.997 Days
  • Premium Plan - Weekly$4.997 Days
Show 7 more
  • Premium Plan - Weekly3 Days trial$5.997 Days
  • Premium Plan - Monthly$9.991 Month
  • Premium Plan - Weekly7 Days trial$9.997 Days
  • Premium Plan - Yearly$19.991 Year
  • Premium Plan - Yearly1 Year trial$29.991 Year
  • Premium Plan - Yearly$29.991 Year
  • Premium Plan - Yearly$49.991 Year
10 purchases

One Scan

Subscriptions10
  • Weekly Premium Pass7 Days trial$3.997 Days
  • Weekly Premium Pass7 Days trial$5.997 Days
  • Scanner Premium Pass7 Days trial$7.997 Days
Show 7 more
  • Monthly Premium Pass7 Days trial$9.991 Month
  • Monthly Premium Pass3 Days trial$9.991 Month
  • Annual Premium Pass$29.991 Year
  • Annually Premium Pass7 Days trial$49.991 Year
  • Yearly Premium Pass3 Days trial$49.991 Year
  • Yearly Premium Pass.$49.991 Year
  • Annually Premium Pass7 Days trial$59.991 Year

Questions

Is SCAN ACE · PDF Scanner App free?
SCAN ACE · PDF Scanner App is free to download, with in-app purchases available.
Is One Scan free?
One Scan is free to download, with in-app purchases available.
Which has better reviews, SCAN ACE · PDF Scanner App or One Scan?
SCAN ACE · PDF Scanner App is rated higher. SCAN ACE · PDF Scanner App averages 4.8 out of 5 from 39K ratings, while One Scan averages 4.7 from 12K ratings.
Do SCAN ACE · PDF Scanner App or One Scan have ads?
Neither SCAN ACE · PDF Scanner App nor One Scan shows ads.
Which is updated more often, SCAN ACE · PDF Scanner App or One Scan?
SCAN ACE · PDF Scanner App ships an update fortnightly, and One Scan every 2 months. Most recently, SCAN ACE · PDF Scanner App was updated on September 24, 2026 and One Scan on September 24, 2026.

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