# Smart PDF Editor vs Authenticator App

The clearest difference is rating: Authenticator App at 4.5 against Smart PDF Editor's 3.8. Authenticator App also leads on ads (none vs shown) and update cadence (monthly vs every 7 months). Smart PDF Editor's advantage is in-app purchases (none vs 4) and review sentiment (21% vs 0%). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Authenticator App sells 4 in-app purchases, starting at $4.99 per 7 days. Smart PDF Editor asks for nothing beyond the download.

Authenticator App holds the better App Store score, 4.5 against 3.8. Both are backed by a comparable volume of ratings — 109 and 24 respectively. Written reviews complicate that: 21% of Smart PDF Editor's written reviews are positive against 0% of Authenticator App's, so the app with the better star average is not the one people write more warmly about.

Smart PDF Editor ships an update every 7 months, Authenticator App monthly. The most recent releases landed on October 8, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Smart PDF Editor | Authenticator App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (109 ratings)](https://appshunter.io/ios/app/smart-pdf-editor/id1184081486/reviews) | **[4.5 (24 ratings)](https://appshunter.io/ios/app/authenticator-app-duo-secure/id6470662300/reviews)** |
| Number of ratings | **109** | 24 |
| Positive reviews | **20.9% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Monthly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 11 MB | 101 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Qrayon, LLC](https://appshunter.io/developer/354980265) | [Apperture Limited](https://appshunter.io/developer/1727867515) |

## What reviewers say

### Smart PDF Editor

[App page](https://appshunter.io/ios/app/smart-pdf-editor/id1184081486)

This app is a PDF editor designed for efficient ink annotations, especially with a stylus. It helps professionals sign and share documents, and students take notes on study materials. Organize your files with a built-in manager.

**Highlights:** Ink annotation optimized, Digital signature tool, Document review and sharing, Note-taking on documents, Built-in file manager, Color-coded categories

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-duo-secure/id6470662300)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $4.99 | per 7 days |
| Pro Version | $7.99 | per 7 days |
| Pro Version | $14.99 | per month |
| Pro Version | $39.99 | per year |


## Frequently asked questions

### Is Smart PDF Editor free?

Smart PDF Editor is free to download, with no in-app purchases.

### Is Authenticator App free?

Authenticator App is free to download, with in-app purchases available.

### Which has better reviews, Smart PDF Editor or Authenticator App?

Authenticator App is rated higher. Smart PDF Editor averages 3.8 out of 5 from 109 ratings, while Authenticator App averages 4.5 from 24 ratings.

### Do Smart PDF Editor or Authenticator App have ads?

Smart PDF Editor shows ads; Authenticator App does not.

### Which is updated more often, Smart PDF Editor or Authenticator App?

Smart PDF Editor ships an update every 7 months, and Authenticator App monthly. Most recently, Smart PDF Editor was updated on October 8, 2026 and Authenticator App on September 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*