Comparison

Pantheon Authenticator vs PDF Expert Viewer

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

Head to head

Pantheon Authenticator

Secure key for digital account

Simple PDF Reader

About

Pantheon Authenticator

Read full description

Protect your digital identity with Pantheon, a powerful and secure Two-Factor Authentication (2FA) app designed for both global services and Authnex-powered platforms. Pantheon generates time-based one-time passwords (TOTP) to add an extra layer of protection to your accounts — ensuring only you can access them.

About

PDF Expert Viewer

Features

Read full description

PDF Expert Viewer – Simple PDF Reader View PDFs with Ease PDF Expert Viewer is a lightweight, no-frills app for viewing PDF documents on your device. Open and read your files quickly without distractions. Key Features: Fast and smooth PDF viewing Zoom in/out and scroll seamlessly Resume reading where you left off Minimal design with no unnecessary features Simple & Reliable Small app size, low storage usage Works offline Just Open and Read Perfect for: Reading ebooks and articles Viewing work documents Checking reports and forms Free to Use Download now and enjoy a straightforward PDF reading experience. [Download Now] PDF Expert Viewer – Keep it simple. Just read.

Screenshots

Pantheon Authenticator4 screens

PDF Expert Viewer4 screens

Verdict

The call

The clearest difference is ads: Pantheon Authenticator at none against PDF Expert Viewer's shown. On price, update cadence, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Pantheon Authenticator ships an update every 5 days, PDF Expert Viewer weekly. The most recent releases landed on September 27, 2026 and October 10, 2026 respectively.

Scorecard1 real difference · 5 level

Pantheon Authenticator versus PDF Expert Viewer: the parameters behind the verdict, then further details
Parameter	Pantheon Authenticator	PDF Expert Viewer
Price	Free	Free
Update frequency	Every 5 days — better	Weekly
Ads	No — better	Yes
In-app purchases	No	No
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	14.0 — better	15
Further details — not scored
Size	17 MB	64 MB
Age rating	12+	17+
Developer	Authnex	Chengdu Doudou Oasis Network Technology Co.,Ltd

In-app purchases

None

Pantheon Authenticator

No in-app purchases

None

PDF Expert Viewer

No in-app purchases

Questions

Is Pantheon Authenticator free?

Pantheon Authenticator is free to download, with no in-app purchases.

Is PDF Expert Viewer free?

PDF Expert Viewer is free to download, with no in-app purchases.

Do Pantheon Authenticator or PDF Expert Viewer have ads?

PDF Expert Viewer shows ads; Pantheon Authenticator does not.

Which is updated more often, Pantheon Authenticator or PDF Expert Viewer?

Pantheon Authenticator ships an update every 5 days, and PDF Expert Viewer weekly. Most recently, Pantheon Authenticator was updated on September 27, 2026 and PDF Expert Viewer on October 10, 2026.