# PDF Compressor vs DueFlow

The clearest difference is in-app purchases: DueFlow at none against PDF Compressor's 4. DueFlow also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. PDF Compressor sells 4 in-app purchases, starting at $5.99 per 7 days. DueFlow asks for nothing beyond the download.

PDF Compressor ships an update fortnightly, DueFlow every 3 weeks. The most recent releases landed on October 6, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | PDF Compressor | DueFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 46 MB | 27 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zahid Hussain](https://appshunter.io/developer/1825488742) | [Abduvokhid Akhmedov](https://appshunter.io/developer/6798760035) |

## What reviewers say

### PDF Compressor

[App page](https://appshunter.io/ios/app/pdf-compressor-merge-split/id6748366278)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $5.99 | per 7 days |
| Monthly Plan | $12.99 | per month |
| Yearly Plan | $24.99 | per year |
| Yearly Trial Plan | $29.99 | per year |


### DueFlow

[App page](https://appshunter.io/ios/app/dueflow-renewal-reminders/id6798760033)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Compressor free?

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

### Is DueFlow free?

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

### Do PDF Compressor or DueFlow have ads?

PDF Compressor shows ads; DueFlow does not.

### Which is updated more often, PDF Compressor or DueFlow?

PDF Compressor ships an update fortnightly, and DueFlow every 3 weeks. Most recently, PDF Compressor was updated on October 6, 2026 and DueFlow on October 29, 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.*