# Sting Mobile vs PDF Compressor

The clearest difference is ads: Sting Mobile at none against PDF Compressor's shown. PDF Compressor's advantage is update cadence (every 2 months vs every 47 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Sting Mobile ships an update every 47 months, PDF Compressor every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Sting Mobile | PDF Compressor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (866 ratings)](https://appshunter.io/ios/app/pdf-compressor-compress-pdf/id1637213307/reviews)** |
| Number of ratings | — | **866** |
| Positive reviews | — | 26.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 47 months | **Every 2 months** |
| Monetization | — | Ad-supported |
| Size | 139 MB | 11 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CAPITAL AIR (PTY) LTD](https://appshunter.io/developer/1598108260) | [Vishalbhai Vaghasiya](https://appshunter.io/developer/1512628511) |

## What reviewers say

### Sting Mobile

[App page](https://appshunter.io/ios/app/sting-mobile/id1598108258)

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

**In-app purchases:** none


### PDF Compressor

[App page](https://appshunter.io/ios/app/pdf-compressor-compress-pdf/id1637213307)

Reduce the size of your PDF documents with this easy-to-use tool. Select your file, choose the desired output quality, and compress your PDFs with a single tap. Save disk space and speed up uploads and downloads.

**Highlights:** Compress PDF files, Reduce PDF file size, Select output PDF quality, Easy-to-use interface, Single-tap compression

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and efficient compression
- 👍 Simple and easy-to-use interface
- 💰 Free to download and use
- ✅ Effective file size reduction
- 📧 Solves email attachment size issues

**What reviewers complain about**

- 📢 Excessive and intrusive advertisements
- 🐛 Frequent app crashes and glitches
- ❌ File compression increases size instead of reducing it
- 🔄 App requires restart after each compression
- ⚠️ Suspicious ad permissions and potential security concerns

**Reported bugs**

- App crashes on second compression attempt
- File size increases instead of decreasing
- App exits unexpectedly after compression
- Compressed file unrecognizable or corrupted
- Keyboard numbers display as blank

**Requested features**

- Reduce or eliminate advertisements
- Add compression quality/control settings
- Batch file compression capability
- Improved preview functionality for multiple documents
- Better file naming conventions for compressed files


## Frequently asked questions

### Is Sting Mobile free?

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

### Is PDF Compressor free?

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

### Do Sting Mobile or PDF Compressor have ads?

PDF Compressor shows ads; Sting Mobile does not.

### Which is updated more often, Sting Mobile or PDF Compressor?

Sting Mobile ships an update every 47 months, and PDF Compressor every 2 months. Most recently, Sting Mobile was updated on November 3, 2026 and PDF Compressor on November 3, 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.*