# Sign Documents vs Authenticator App

The clearest difference is review sentiment: Sign Documents at 89% against Authenticator App's 50%. Sign Documents also leads on monetization model (free with in-app purchases vs subscription) and rating (4.5 vs 4.1). Authenticator App's advantage is update cadence (daily vs every 6 weeks). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Sign Documents sells 2 in-app purchases, starting at $8.99 per month and Authenticator App sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Sign Documents holds the better App Store score, 4.5 against 4.1. That said, the two scores are not equally well evidenced: Sign Documents has 65 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 89% of Sign Documents's written reviews are positive against 50% of Authenticator App's.

Sign Documents ships an update every 6 weeks, Authenticator App daily. The most recent releases landed on September 27, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Sign Documents | Authenticator App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (65 ratings)](https://appshunter.io/ios/app/sign-documents-sign-and-edit-pdf/id6475158813/reviews)** | [4.1 (9 ratings)](https://appshunter.io/ios/app/authenticator-app-two-factor/id6642711356/reviews) |
| Number of ratings | **65** | 9 |
| Positive reviews | **88.9% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Daily** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 9 MB | 13 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [晓峰 刘](https://appshunter.io/developer/1605337002) | [Marvin Wimmer](https://appshunter.io/developer/1771470022) |

## What reviewers say

### Sign Documents

[App page](https://appshunter.io/ios/app/sign-documents-sign-and-edit-pdf/id6475158813)

Easily add signatures, text, and images to your PDF documents. This user-friendly tool offers real-time saving and an intuitive interface for quick document personalization. Ideal for students and professionals needing efficient PDF editing.

**Highlights:** Add signatures, Insert text, Add images, Real-time saving, Intuitive interface, Personalize documents

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Editor PRO | $8.99 | per month |
| Forever Pro | $14.99 | one-time |


### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-two-factor/id6642711356)

Transform your living spaces with AI-powered design tools. Upload a room photo, select a style, and see instant real-time transformations. Explore endless customization and save your favorite creations.

**Highlights:** Instant room transformation, AI-powered design suggestions, Variety of design styles, Save and share designs, User-friendly interface, Explore design trends

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Weekly | $6.99 | per 7 days |


## Frequently asked questions

### Is Sign Documents free?

Sign Documents 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, Sign Documents or Authenticator App?

Sign Documents is rated higher. Sign Documents averages 4.5 out of 5 from 65 ratings, while Authenticator App averages 4.1 from 9 ratings.

### Do Sign Documents or Authenticator App have ads?

Neither Sign Documents nor Authenticator App shows ads.

### Which is updated more often, Sign Documents or Authenticator App?

Sign Documents ships an update every 6 weeks, and Authenticator App daily. Most recently, Sign Documents was updated on September 27, 2026 and Authenticator App on September 17, 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.*