Comparison

Authtify vs PDF Assist

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

Head to head
About

Authtify

Features
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Authtify is an identity validator that can receive verification requests online and verify whether they are approved or rejected. Use Authtify authentication, send verification requests online, verify in real time, and protect the security of your account data information. Based on OTP technology, when users perform authentication, Authtify authentication is triggered in a third-party application. After logging into Authtify with an account and password, real-time online authentication requests are initiated. Authtify users can directly click pass or reject, enter the set PIN code, and complete Authtify authentication. Authtify validation supports biological validation methods to pass validation. Users can enable biometric authentication in the account and security settings of the Authtify application. When receiving real-time authentication requests, Authtify users can authenticate through the biometric authentication method set by the device, recognize through Face ID and Touch ID, and ensure that only you have access to the application, ensuring your data privacy and operational security. Authtify supports blacklisting verification applications and application verification accounts. After blacklisting, applications will be placed on a blacklist, and accounts under subsequent applications will not be allowed to undergo Authtify verification. Once the blacklisting is lifted, verification can resume normal use. A simple and intuitive interface makes it easy for users to use, and provides home page shortcut application customization settings, making it convenient for users to operate quickly.

About

PDF Assist

Features
Read full description

PDF Converter Assistant – Make document processing more efficient and professional Whether it's document conversion for work, organizing materials for study, or archiving files in daily life, we provide a one-stop solution. No more switching between multiple tools — one phone handles all format conversions quickly, easily, and professionally. Multiple format conversions to meet different needs • PDF to Word/Excel/PPT: Intelligently recognizes layout and content, and outputs high-fidelity editable documents • PDF to Image: Supports high-resolution export for easy sharing or printing • Word/Excel/PPT to PDF: One-tap creation of standardized documents with original formatting preserved • Image to PDF: Supports converting images into PDFs — ideal for scanning IDs, receipts, or archiving • Supports common file formats: .pdf, .docx, .xlsx, .pptx, .jpg, .png, etc. Applicable scenarios covering the full workflow of study and work • Students: Convert courseware and handouts to PDF for archiving, or convert PDF textbooks to Word for note-taking • Workplace: Quickly convert work reports, financial spreadsheets, and presentations to boost productivity • Business trips: Convert PPT to PDF for presentation without relying on a computer or specific software • Freelancers: Scan images to PDF for submitting work, contracts, or invoices • Daily use: Quickly convert receipts, certificates, and IDs to PDF for centralized management [Auto-Renewal Rules] 1. We offer auto-renewable subscription plans for 1 week, 1 month, and 12 months 2. Payment: After the user confirms the purchase, the fee will be charged to their iTunes account 3. Renewal: Subscriptions with a free trial will automatically renew as paid subscriptions. Your iTunes account will be charged within 24 hours before the current period ends. The renewal cost depends on your plan. Once charged, the subscription period will be extended accordingly 4. Cancel Renewal: To cancel the subscription, please manually turn off auto-renewal in your iTunes / Apple ID settings at least 24 hours before the current period ends to avoid being charged again User Agreement: http://oss.yunjikeji.work/h5/pdf/user.html Privacy Policy: http://oss.yunjikeji.work/h5/pdf/privacy.html Subscription Agreement: http://oss.yunjikeji.work/h5/pdf/subscribe.html

Screenshots

Authtify4 screens
PDF Assist3 screens

Verdict

The call

The clearest difference is in-app purchases: Authtify at none against PDF Assist's 4. On price, update cadence, ads and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. PDF Assist sells 4 in-app purchases, starting at $2.99 per 7 days. Authtify asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

Scorecard1 real difference Ā· 5 level
Authtify versus PDF Assist: the parameters behind the verdict, then further details
ParameterAuthtifyPDF Assist
PriceFreeFree
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size29 MB7 MB
Age rating17+4+
DeveloperByteflux鑫 ēŽ‹

In-app purchases

None

Authtify

No in-app purchases

4 purchases

PDF Assist

Subscriptions3
  • Weekly Subscription7 Days trial$2.997 Days
  • Monthly Subscription$4.991 Month
  • Annual Subscription$14.991 Year
One-time1
  • Permanent member$24.99

Questions

Is Authtify free?
Authtify is free to download, with no in-app purchases.
Is PDF Assist free?
PDF Assist is free to download, with in-app purchases available.
Do Authtify or PDF Assist have ads?
Neither Authtify nor PDF Assist shows ads.
Which is updated more often, Authtify or PDF Assist?
Authtify ships an update every 4 months, and PDF Assist every 4 months. Most recently, Authtify was updated on November 4, 2026 and PDF Assist on October 30, 2026.

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