# SDTPS Auctions vs PDF Compression

The clearest difference is in-app purchases: SDTPS Auctions at none against PDF Compression's 1. SDTPS Auctions also leads on ads (none vs shown) and iOS requirement (9.0 vs 18.5). PDF Compression's advantage is update cadence (every 4 days vs every 2 months). On price and device support there is nothing between them.

Both are free to download. PDF Compression sells 1 one-off in-app purchase. SDTPS Auctions asks for nothing beyond the download.

SDTPS Auctions ships an update every 2 months, PDF Compression every 4 days. The most recent releases landed on September 25, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | SDTPS Auctions | PDF Compression |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/pdf-compression/id6752516285/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 19 MB |
| Requires iOS | **9.0** | 18.5 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SDTPS – Sharjah Government](https://appshunter.io/developer/973033207) | [Antonio Gonzalez de la aleja german](https://appshunter.io/developer/1839645711) |

## What reviewers say

### SDTPS Auctions

[App page](https://appshunter.io/ios/app/sdtps-auctions/id1193052124)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Compression

[App page](https://appshunter.io/ios/app/pdf-compression/id6752516285)

Easily reduce the size of your PDF files without sacrificing quality. This tool is perfect for students and professionals needing to optimize documents for storage, email, or sharing. Compress multiple files quickly and efficiently.

**Highlights:** Compress PDFs for free, Reduce file size to specific megabytes, Optimize documents for email and sharing, Compress multiple PDFs at once, Maintain document quality during compression, Convert PDFs to ZIP format

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is SDTPS Auctions free?

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

### Is PDF Compression free?

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

### Do SDTPS Auctions or PDF Compression have ads?

PDF Compression shows ads; SDTPS Auctions does not.

### Which is updated more often, SDTPS Auctions or PDF Compression?

SDTPS Auctions ships an update every 2 months, and PDF Compression every 4 days. Most recently, SDTPS Auctions was updated on September 25, 2026 and PDF Compression on October 1, 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.*