Comparison

Avi Pdf Pro vs Ulak

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

Head to head
About

Avi Pdf Pro

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
Read full description

Free and easy to use complete PDF toolkit with functions to create, merge, lock, unlock, watermark PDF files using images from your phone or phone camera. This tool does not store your files on our server longer than needed. All files will be deleted from our server after process completes.

About

Ulak

Features
Read full description

ULAK is an open-source local network file sharing app developed by Turkish engineers. No internet connection required, no cloud servers involved — all transfers happen directly between devices. SECURE TRANSFERS AES-256 encryption ensures your files and texts can only be opened on the target device. Setting a custom password is optional. INSTANT DISCOVERY ULAK devices on the same network appear automatically. No manual IP entry or pairing needed. EVERY FILE TYPE Send photos, videos, audio, PDFs, ZIPs, text and more. Easy file selection via gallery picker and file browser. SHARE VIA LINK The built-in HTTP server lets you share a file or text accessible from any browser on the same network. Share the link or copy it instantly. APPLE WATCH SUPPORT Get notified on your Apple Watch, approve or reject incoming transfers, and monitor service status — all from your wrist. CLIPBOARD SHARING Send any text or image from your clipboard to other ULAK devices with a single tap. NOTIFICATIONS Receive instant notifications when a file or text arrives. AUTO ACCEPT Automatically accept files without prompts on trusted networks. iPadOS READY Full support for all iPad models — landscape and portrait, Files app integration, and split-screen compatible. Open source under the MIT License.

Screenshots

Avi Pdf Pro4 screens
Ulak4 screens

Verdict

The call

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.

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

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

Scorecard1 real difference · 9 level
Avi Pdf Pro versus Ulak: the parameters behind the verdict, then further details
ParameterAvi Pdf ProUlak
PriceFreeFree
Rating4.0 (8 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings8 — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, Mac, Apple Watch — better
Requires iOS15.0 — better17.0
Further details — not scored
Size40 MB19 MB
Age rating4+4+
DeveloperNavjot SinghFatih ONDER

In-app purchases

None

Avi Pdf Pro

No in-app purchases

None

Ulak

No in-app purchases

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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