# PDF Compressor ・ PDF Converter vs Olfactree SION ERP

The clearest difference is in-app purchases: Olfactree SION ERP at none against PDF Compressor ・ PDF Converter's 10. Olfactree SION ERP also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.6). PDF Compressor ・ PDF Converter's advantage is update cadence (every 5 days vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. PDF Compressor ・ PDF Converter sells 9 in-app purchases, starting at $4.99 per 7 days. Olfactree SION ERP asks for nothing beyond the download.

PDF Compressor ・ PDF Converter ships an update every 5 days, Olfactree SION ERP every 3 weeks. The most recent releases landed on October 28, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | PDF Compressor ・ PDF Converter | Olfactree SION ERP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (73 ratings)](https://appshunter.io/ios/app/pdf-compressor-pdf-converter/id6742428142/reviews)** | — |
| Number of ratings | **73** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 41 MB | 55 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RIJIPUPS OU](https://appshunter.io/developer/1594002879) | [Aayush Tekriwal](https://appshunter.io/developer/1766291418) |

## What reviewers say

### PDF Compressor ・ PDF Converter

[App page](https://appshunter.io/ios/app/pdf-compressor-pdf-converter/id6742428142)

Easily convert, scan, compress, and edit documents into PDFs. This tool offers smart camera features for accurate scanning, flexible compression options to save space, and the ability to merge or convert files. Keep your documents organized and secure with password protection.

**Highlights:** Convert photos, files, and scans to PDF, Smart camera for auto-detection and cropping, Compress PDFs with quality settings, Merge multiple PDFs, Convert PDFs to JPG or ZIP, Password protect sensitive documents, Edit and reorder PDF pages

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Converter PRO | $4.99 | per 7 days |
| PDF Converter PRO | $6.99 | per 7 days |
| PDF Converter PRO | $6.99 | per 7 days |
| PDF Converter PRO | $6.99 | per 7 days |
| PDF Converter PRO | $7.99 | per 7 days |
| PDF Converter PRO | $11.99 | per month |
| PDF Converter PRO | $19.99 | per month |
| PDF Converter PRO | $99.99 | per year |
| PDF Converter PRO | $119.99 | per year |


### Olfactree SION ERP

[App page](https://appshunter.io/ios/app/olfactree-sion-erp/id6792993505)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Compressor ・ PDF Converter free?

PDF Compressor ・ PDF Converter is free to download, with in-app purchases available.

### Is Olfactree SION ERP free?

Olfactree SION ERP is free to download, with no in-app purchases.

### Do PDF Compressor ・ PDF Converter or Olfactree SION ERP have ads?

PDF Compressor ・ PDF Converter shows ads; Olfactree SION ERP does not.

### Which is updated more often, PDF Compressor ・ PDF Converter or Olfactree SION ERP?

PDF Compressor ・ PDF Converter ships an update every 5 days, and Olfactree SION ERP every 3 weeks. Most recently, PDF Compressor ・ PDF Converter was updated on October 28, 2026 and Olfactree SION ERP on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*