# Avi Pdf Pro vs Ulak

The clearest difference is iOS requirement: Avi Pdf Pro at 15.0 against Ulak's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Avi Pdf Pro | Ulak |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (8 ratings)](https://appshunter.io/ios/app/avi-pdf-pro/id1469857534/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 40 MB | 19 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Navjot Singh](https://appshunter.io/developer/1469857533) | [Fatih ONDER](https://appshunter.io/developer/6776188512) |

## What reviewers say

### Avi Pdf Pro

[App page](https://appshunter.io/ios/app/avi-pdf-pro/id1469857534)

This utility app offers a comprehensive suite of tools for managing PDF files. Easily create, merge, lock, unlock, and watermark PDFs using images or your phone's camera. Your files are processed securely and deleted from servers after completion.

**Highlights:** Create PDF files, Merge PDF files, Lock PDF files, Unlock PDF files, Watermark PDF files, Use phone images or camera

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

**In-app purchases:** none


### Ulak

[App page](https://appshunter.io/ios/app/ulak-fast-file-transfer/id6776188510)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Avi Pdf Pro free?

Avi Pdf Pro is free to download, with no in-app purchases.

### Is Ulak free?

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

### Do Avi Pdf Pro or Ulak have ads?

Neither Avi Pdf Pro nor Ulak shows ads.

### Which is updated more often, Avi Pdf Pro or Ulak?

Avi Pdf Pro ships an update every 2 months, and Ulak every 2 months. Most recently, Avi Pdf Pro was updated on November 3, 2026 and Ulak on October 31, 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.*