Comparison

iSign vs Authenticator App

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

Head to head
About

iSign

Transform any document into a searchable, signable PDF. Scan, organize, and edit with AI-powered summaries and OCR. Your data remains private on your device.

Highlights
  • Scan documents to PDF
  • Automatic edge detection
  • Edit and sign documents
  • OCR text recognition
  • AI-powered summaries
  • On-device data storage
Features
Read full description

Turn any document into a searchable, signable PDF — in seconds. Sherlock is the fastest way to scan, organize, sign, and understand your documents. Whether it's a contract, a receipt, or a handwritten note — just point your camera and you're done. SCAN TO PDF INSTANTLY Use your camera to capture any document with automatic edge detection and perspective correction. Sherlock produces crisp, high-quality PDFs every time — no flatbed scanner needed. EDIT & SIGN DOCUMENTS Add your signature, insert text, draw annotations, and reorder pages directly inside the app. Send signed contracts in minutes, not days. OCR TEXT RECOGNITION Sherlock reads your scanned documents and extracts all the text, making it searchable and copyable. Find any word inside any document, instantly. AI-POWERED SUMMARIES Paste any document or text and get a clear, concise summary in seconds. Ask follow-up questions to refine and dig deeper, like having a personal assistant for your paperwork. YOUR DATA STAYS PRIVATE Documents are stored exclusively on your device. Nothing is uploaded to the cloud without your consent. Your files are yours always. PERFECT FOR: - Freelancers & remote workers signing contracts on the go - Students digitizing class notes and textbooks - Anyone who wants to go paperless at home - Professionals managing receipts, invoices, and legal documents Try free for 3 days. No commitment. Start your trial and see why Sherlock is the last document app you'll ever need. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Authenticator App

Enhance digital security with a multi-factor authenticator app. It provides an extra layer of protection for sensitive accounts and information, working offline for reliable access. Protect email, social media, financial accounts, and more with this user-friendly solution.

Highlights
  • Multi-factor authentication
  • Offline 2FA code generation
  • Wide service integration
  • User-friendly interface
  • Enhanced account protection
Features
Read full description

Enhance the security of your digital life with the Multi-factor Authenticator. Our app is designed to provide you with an additional layer of protection, ensuring that your sensitive accounts and information remain safe from unauthorized access. Whether you're a business professional, a tech-savvy individual, or simply someone who values their online privacy, Multi-factor Authenticator is your trusted companion in the world of cybersecurity. Protect your email, social media, financial accounts, and more. multi-factor Authenticator is your reliable, user-friendly solution, making it effortless to implement two-factor authentication across various online platforms. - Multi-factor Authenticator effortlessly integrates with a wide range of online services and accounts. Whether you're securing your email, social media, or cloud storage, our app supports popular platforms and is continually expanding its compatibility - The app's intuitive and user-friendly interface makes it easy for both tech-savvy individuals and newcomers to 2FA. No technical expertise is required to set up and use this powerful security tool - Don't rely on an internet connection for your 2FA codes. Multi-factor Authenticator works offline, ensuring your security is never compromised, even in challenging network conditions Subscription terms: - Payment will be charged to your Apple ID account at the confirmation of purchase - Your account will be charged for renewal within 24 hours prior to the end of the current period - You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase - After the free trial period, if offered, the subscription automatically renews with the price and duration given above unless it is canceled at least 24 hours before the end of the current period - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Privacy Policy: https://apperture.neocities.org/authenticator/apple/privacy Terms of Use: https://apperture.neocities.org/authenticator/apple/terms

Screenshots

iSign4 screens
Authenticator App3 screens

Verdict

The call

The clearest difference is review sentiment: iSign at 100% against Authenticator App's 0%. iSign also leads on rating (5.0 vs 4.5) and update cadence (fortnightly vs monthly). Authenticator App's advantage is ratings volume (24 vs 1) and iOS requirement (15.0 vs 18.0). 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. iSign sells 4 in-app purchases, starting at $0.99 per month and Authenticator App sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

iSign holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Authenticator App has 24 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of iSign's written reviews are positive against 0% of Authenticator App's.

UpkeepUpdate frequency

iSign ships an update fortnightly, Authenticator App monthly. Both last shipped on September 29, 2026.

Scorecard5 real differences · 5 level
iSign versus Authenticator App: the parameters behind the verdict, then further details
ParameteriSignAuthenticator App
PriceFreeFree
Rating5.0 (1 ratings) — better4.5 (24 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings124 — better
Update frequencyFortnightly — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size69 MB101 MB
Age rating4+4+
DeveloperBruno WideApperture Limited

Customer experience

iSign

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Authenticator App

All ratings24 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

4 purchases

iSign

Subscriptions4
  • Scanner Pro - Monthly Promo$0.991 Month
  • Scanner Pro - Monthly$1.991 Month
  • Scanner Pro - Yearly Promo$9.991 Year
Show 1 more
  • Scanner Pro - Yearly$19.991 Year
4 purchases

Authenticator App

Subscriptions4
  • Pro Version$4.997 Days
  • Pro Version3 Days trial$7.997 Days
  • Pro Version$14.991 Month
Show 1 more
  • Pro Version7 Days trial$39.991 Year

Questions

Is iSign free?
iSign is free to download, with in-app purchases available.
Is Authenticator App free?
Authenticator App is free to download, with in-app purchases available.
Which has better reviews, iSign or Authenticator App?
iSign is rated higher. iSign averages 5.0 out of 5 from 1 ratings, while Authenticator App averages 4.5 from 24 ratings.
Do iSign or Authenticator App have ads?
Neither iSign nor Authenticator App shows ads.
Which is updated more often, iSign or Authenticator App?
iSign ships an update fortnightly, and Authenticator App monthly. Most recently, iSign was updated on September 29, 2026 and Authenticator App on September 29, 2026.

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