# Due.Zero vs UPDF

The clearest difference is in-app purchases: Due.Zero at none against UPDF's 10. UPDF's advantage is update cadence (fortnightly vs every 4 months) and iOS requirement (14.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. UPDF sells 10 in-app purchases, starting at $9.99 per month. Due.Zero asks for nothing beyond the download.

Due.Zero ships an update every 4 months, UPDF fortnightly. The most recent releases landed on November 3, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Due.Zero | UPDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (705 ratings)](https://appshunter.io/ios/app/updf-ai-powered-pdf-editor/id1595826623/reviews)** |
| Number of ratings | — | **705** |
| Positive reviews | — | 84.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 195 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DUE.ZERO SRL](https://appshunter.io/developer/1545104646) | [Superace Software Technology Co., Ltd.](https://appshunter.io/developer/1595826625) |

## What reviewers say

### Due.Zero

[App page](https://appshunter.io/ios/app/duezero/id1544240205)

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

**In-app purchases:** none


### UPDF

[App page](https://appshunter.io/ios/app/updf-ai-powered-pdf-editor/id1595826623)

This app is a powerful PDF editor for mobile devices, offering AI-powered features for summarizing, translating, and chatting with documents. It allows users to read, edit, annotate, convert, and sign PDFs, as well as scan paper documents into editable files. Manage all your PDF files and protect them with security features.

**Highlights:** AI-powered summarization and translation, Edit text, images, and watermarks in PDFs, Annotate with various markup tools, Convert PDFs to Word, Excel, and PPT, Scan documents to editable PDFs, Sign and fill PDF forms, Organize and protect PDF files

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $9.99 | per month |
| UPDF AI Unlimited | $15.00 | per month |
| UPDF AI Standard | $15.00 | per month |
| UPDF Pro + AI Unlimited | $18.99 | per month |
| Quarterly Subscription | $19.00 | per 3 months |
| Annual Subscription | $49.99 | per year |
| UPDF AI Standard | $69.00 | per year |
| UPDF AI Unlimited | $79.00 | per year |
| Perpetual License | $79.99 | one-time |
| UPDF & AI Add-on for iOS | $148.99 | one-time |

**What reviewers like**

- 🚀 Excellent PDF editor
- 👍 Intuitive and easy to use
- 🔒 Secure file management
- 💡 Powerful features like AI-powered summarization
- 🚀 Fast and responsive performance

**What reviewers complain about**

- 🐛 Occasional crashes or stability issues
- 💡 Need for more customization options
- 💡 Lack of integration with third-party cloud storage
- 🐛 Issues with handwriting recognition and annotation

**Reported bugs**

- Inability to edit text directly in PDF files
- Inconsistent behavior when switching between devices
- Occasional loss of editing progress when app is minimized

**Requested features**

- Add password protection for PDF files
- Improve file organization and folder management
- Implement keyboard shortcuts for power users
- Expand OCR capabilities and text extraction
- Allow custom signature and stamp imports


## Frequently asked questions

### Is Due.Zero free?

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

### Is UPDF free?

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

### Do Due.Zero or UPDF have ads?

Neither Due.Zero nor UPDF shows ads.

### Which is updated more often, Due.Zero or UPDF?

Due.Zero ships an update every 4 months, and UPDF fortnightly. Most recently, Due.Zero was updated on November 3, 2026 and UPDF on November 11, 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.*