Comparison

PDF Viewer vs Authenticator

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

Head to head
About

PDF Viewer

Easily convert various file formats to PDF and back again. This app supports conversions from images, documents, and presentations, allowing you to manage and share your files efficiently. It also offers OCR capabilities to convert photos into editable text.

Highlights
  • Convert JPG, Word, Excel, PPT to PDF
  • Convert PDF to other formats
  • Share and save converted files
  • Access conversion history
  • Pull files from iCloud or gallery
  • Convert Photos to Text (OCR)
Read full description

PDF Viewer makes file conversions easy, fast, and completely free. Convert files like JPG, Word, Excel, PPT, and more to PDF or convert PDFs back to other formats all from your iPhone.  Here’s what you can do with PDF Viewer: ● Convert files from popular formats like JPG, DOC, XLS, PPT, TXT, RTF, EPUB, and many more to PDF ● Convert PDF files back into various formats ● Share or save your converted files directly to iCloud or other apps ● Access and manage your conversion history ● Pull files from iCloud, your photo gallery, or capture a new image for conversion ● Share converted files via iMessage, open them in other apps, print, or save them to your Files app ● Convert Photos to Text ———————————————————— ◆ How to convert files with PDF Viewer ◆ 1. Select the file you want to convert 2. Choose your desired output format (PDF or another) 3. Tap the “Convert” button 4. Your file will be instantly converted (you can then save it, share it, or access it from your history) ———————————————————— PDF Viewer subscription policy: Once you sign up to PDF Viewer Premium, you will have full access to all of PDF Viewer’s features for free for 3 days. You can cancel your subscription any time and you will be sent a reminder before your PDF Viewer subscription begins after your trial. PDF Viewer Premium Subscription: - With a PDF Viewer Premium subscription you have access to all of PDF Viewer’s advanced PDF editing features, and access to all future updates. - PDF Viewer Premium monthly subscription is billed monthly for $4.99, and payment will be charged to iTunes Account after a 3 day free trial. - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. - Subscriptions can be managed by the user and auto-renewal can be turned off by going to the user's iPhone Settings -> Apple ID -> Subscriptions. ———————————————————— Connect with us on X and Instagram: @AndrewLeeReal Have any questions or recommendations? Feel free to reach out to me at: Andrew@AndrewLee.Ventures Privacy Policy: http://andrewlee.ventures/privacy Terms of Use: http://andrewlee.ventures/terms

About

Authenticator

Secure your online accounts with this app, offering robust two-factor authentication (2FA) and time-based one-time password (TOTP) generation. It provides advanced security features like end-to-end encryption, privacy mode, and break-in alerts, alongside convenient multi-device sync and quick QR code scanning for effortless account protection across all your Apple devices.

Highlights
  • Time-based one-time password (TOTP) generation
  • End-to-end encryption for codes
  • Privacy Mode to hide codes
  • Break-in alerts for unauthorized access attempts
  • Multi-device sync across Apple ecosystem
  • Quick QR code scanning for account setup
  • Lock screen widgets for instant access
Features
Read full description

Protect your online accounts with Authenticator App, the ultimate two-factor authentication (2FA) solution designed for security, privacy, and everyday convenience. Generate time-based one-time passwords (TOTP) and keep every account safe across all your Apple devices. Whether you need an authenticator app for Google, Microsoft, Facebook, Amazon, or any other service – this is your all-in-one 2FA security companion. WHY PEOPLE CHOOSE AUTHENTICATOR APP * Built for modern account security threats and data breaches * Designed for real life, not just tech experts * Simple, beautiful and deeply secure experience * Trusted by users who want protection, not complexity ADVANCED SECURITY & PRIVACY * End-to-End Encryption – Military-grade protection for all your codes * Privacy Mode – Hide verification codes from prying eyes with a single tap * FaceDown Lock – Instantly lock the app by placing your device face down * Break-In Alerts – Get notified if someone attempts unauthorized access * Biometric Lock – Secure the app with Face ID or Touch ID EFFORTLESS & CONVENIENT 2FA * Multi-Device Sync – Access your 2FA codes across iPhone, iPad, Apple Watch, and Mac * Encrypted iCloud Backup – Never lose access to your accounts * Quick QR Code Scan – Add new accounts in seconds by scanning QR codes * Lock Screen Widget – Instant access to your most-used 2FA codes * Search & Organize – Find accounts quickly with smart search and custom icons OPTIMIZED FOR APPLE ECOSYSTEM * Apple Watch Support – Access 2FA codes directly from your wrist * iPad & Mac Integration – Seamless authentication across all Apple devices * Offline Authentication – Generate codes even without internet connection * Lock Screen & Home Screen Widgets – Pin codes for one-glance access PERSONALIZED EXPERIENCE * Dark & Light Mode – Choose the theme that suits your style * Custom Icons – Personalize with recognizable brand icons * Flexible Layout – List view, grid view, or favorites WORKS WITH ALL MAJOR SERVICES * Google, Microsoft, Facebook, Apple, Instagram, Twitter/X, Amazon, Coinbase, Discord, GitHub, Dropbox, LinkedIn, Snapchat, TikTok, Reddit, Steam, Epic Games, Nvidia, PayPal, Binance, Kraken, Shopify, WordPress, and thousands more * Perfect as your Authenticator App for Google * Perfect as your Authenticator App for Microsoft * Perfect as your Authenticator App for Facebook * Perfect as your Authenticator App for Instagram * Perfect as your Authenticator App for Crypto & Banking WHY CHOOSE AUTHENTICATOR APP? * Free to use with premium features * No account or phone number required * No ads in the core experience * Works completely offline * Regular updates and improvements * Designed for privacy – your data stays yours YOUR ACCOUNTS DESERVE PROTECTION Download Authenticator App Add 2FA now Secure every login Stay protected ---------------------------------------------------------------------------------------------------------------- Subscription Details: Payment will be charged to your iTunes Account at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage auto-renewal in your App Store settings. Privacy Policy: https://sites.google.com/view/centillion-policy/home EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PDF Viewer4 screens
Authenticator4 screens

Verdict

The call

The clearest difference is review sentiment: PDF Viewer at 89% against Authenticator's 26%. PDF Viewer also leads on rating (4.8 vs 4.4). Authenticator's advantage is update cadence (every 3 weeks vs every 3 months). On price, ratings volume, 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. PDF Viewer sells 2 in-app purchases, starting at $4.99 per month and Authenticator sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

PDF Viewer holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 235 and 179 respectively. Written reviews point the same way: 89% of PDF Viewer's written reviews are positive against 26% of Authenticator's.

UpkeepUpdate frequency

PDF Viewer ships an update every 3 months, Authenticator every 3 weeks. The most recent releases landed on September 8, 2026 and September 22, 2026 respectively.

Scorecard3 real differences · 7 level
PDF Viewer versus Authenticator: the parameters behind the verdict, then further details
ParameterPDF ViewerAuthenticator
PriceFreeFree
Rating4.8 (235 ratings) — better4.4 (179 ratings)
Positive reviews89.5% of reviews — better26.3% of reviews
Number of ratings235 — better179
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS15.0 — better16.0
Further details — not scored
Size11 MB32 MB
Age rating4+4+
DeveloperAndrew LeeArpit Kakadiya

Customer experience

PDF Viewer

All ratings235 ratings
Positive96.6%
Neutral2.6%
Negative0.9%
Written reviews57 reviews
Positive89.5%
Neutral7.0%
Negative3.5%

Authenticator

All ratings179 ratings
Positive86.0%
Neutral3.9%
Negative10.1%
Written reviews19 reviews
Positive26.3%
Neutral0.0%
Negative73.7%

User reviews

PDF Viewer

From 235 App Store ratings

What we love

  • 👍 Easy and intuitive to use
  • 🚀 Fast and efficient conversion
  • 💰 Free or affordable pricing
  • 📄 Excellent PDF conversion and merging capabilities
  • 🎨 Clean and simple interface design

Room to improve

  • 🐛 Forced review prompt before app usage
  • ❌ Missing file deletion option
  • 📸 No in-app camera scanning capability
  • ⚙️ No file size customization options
  • 🔄 Inconsistent performance across devices

Authenticator

From 179 App Store ratings

What we love

  • 👍 Working app after latest update
  • 👍 Lifetime subscription working

Room to improve

  • 🐛 Lifetime purchase option not working
  • 🐛 Subscription issue after lifetime purchase
  • 🔒 Lack of transparency and false information
  • 🚫 Deceptive free lifetime offer

Bugs and requests

PDF Viewer

Reported bugs

4 issues
  • App doesn't function on iPad mini (current model)
  • Forced review requirement blocks app access
  • Document quality issues when converting images to PDF
  • Occasional glitches during operation

Requested features

5 requests
  • Add file deletion functionality
  • Implement in-app camera scanning feature
  • Add page merge and delete options
  • Include file size/quality customization
  • Support for more device types (iPad compatibility)

Authenticator

Reported bugs

3 issues
  • Lifetime purchase option not working
  • Subscription issue after lifetime purchase
  • Lifetime offer not working

Requested features

1 request
  • Generate QR code for existing accounts

In-app purchases

2 purchases

PDF Viewer

Subscriptions1
  • PDF Converter: Premium3 Days trial$4.991 Month
One-time1
  • PDF Converter: PremiumFree
4 purchases

Authenticator

Subscriptions3
  • Weekly$1.997 Days
  • Monthly$4.991 Month
  • Annual3 Days trial$19.991 Year
One-time1
  • Lifetime$39.99

Questions

Is PDF Viewer free?
PDF Viewer is free to download, with in-app purchases available.
Is Authenticator free?
Authenticator is free to download, with in-app purchases available.
Which has better reviews, PDF Viewer or Authenticator?
PDF Viewer is rated higher. PDF Viewer averages 4.8 out of 5 from 235 ratings, while Authenticator averages 4.4 from 179 ratings.
Do PDF Viewer or Authenticator have ads?
Neither PDF Viewer nor Authenticator shows ads.
Which is updated more often, PDF Viewer or Authenticator?
PDF Viewer ships an update every 3 months, and Authenticator every 3 weeks. Most recently, PDF Viewer was updated on September 8, 2026 and Authenticator on September 22, 2026.

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