# Merge files PDF vs Authtify

The clearest difference is in-app purchases: Authtify at none against Merge files PDF's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Merge files PDF sells 3 in-app purchases, starting at $0.99 per 7 days. Authtify asks for nothing beyond the download.

Merge files PDF ships an update every 2 weeks, Authtify every 3 weeks. The most recent releases landed on September 23, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Merge files PDF | Authtify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (339 ratings)](https://appshunter.io/ios/app/merge-files-pdf/id1559819770/reviews)** | — |
| Number of ratings | **339** | — |
| Positive reviews | 25.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Freemium | — |
| Size | 3 MB | 38 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Abdullah Albalawi](https://appshunter.io/developer/1008309841) | [Byteflux](https://appshunter.io/developer/1748538053) |

## What reviewers say

### Merge files PDF

[App page](https://appshunter.io/ios/app/merge-files-pdf/id1559819770)

Combine multiple PDF documents into a single file with ease. Select your desired PDFs and merge them quickly. Unlock advanced features like sharing, renaming, and unlimited merging with a premium subscription.

**Highlights:** Merge multiple PDF files, Easy to use interface, Display merged PDF, Share merged PDF, Rename merged PDF, Unlimited merging (premium)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| weekly subscription | $0.99 | per 7 days |
| monthly subscription | $3.99 | per month |
| yearly subscription | $14.99 | per year |

**What reviewers like**

- 🚀 Merge files
- 👍 Good app
- 💡 Can get free

**What reviewers complain about**

- 🐛 Doesn't work
- 💰 Need to pay for everything
- 🔒 Can't share or save without paying
- ⚠️ Useless if you don't pay
- 🚫 Fraud app

**Reported bugs**

- Subscription issues
- Incompatible with free usage

**Requested features**

- Allow free sharing and saving of merged files
- Improve free functionality


### Authtify

[App page](https://appshunter.io/ios/app/authtify/id6503684459)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Merge files PDF free?

Merge files PDF is free to download, with in-app purchases available.

### Is Authtify free?

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

### Do Merge files PDF or Authtify have ads?

Neither Merge files PDF nor Authtify shows ads.

### Which is updated more often, Merge files PDF or Authtify?

Merge files PDF ships an update every 2 weeks, and Authtify every 3 weeks. Most recently, Merge files PDF was updated on September 23, 2026 and Authtify on September 13, 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.*