# PDF workbench vs Sum

The clearest difference is ads: Sum at none against PDF workbench's shown. Sum also leads on update cadence (every 5 days vs every 2 weeks) and iOS requirement (13.0 vs 15.1). On price, in-app purchases and device support there is nothing between them.

Both are free to download. PDF workbench sells 2 in-app purchases, starting at $4.99 per month and Sum sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

PDF workbench ships an update every 2 weeks, Sum every 5 days. The most recent releases landed on October 8, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | PDF workbench | Sum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pdf-workbench-convert-and-edit/id6742145977/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 32 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NOVASCRIPTUM LLC](https://appshunter.io/developer/1797063657) | [Aprilred SRL](https://appshunter.io/developer/1057855420) |

## What reviewers say

### PDF workbench

[App page](https://appshunter.io/ios/app/pdf-workbench-convert-and-edit/id6742145977)

Edit, convert, and manage PDF documents with a comprehensive suite of tools. Transform images and documents into PDFs, extract text, merge files, and secure your documents with passwords and watermarks. Offers batch processing and an intuitive interface for efficient mobile PDF management.

**Highlights:** Convert images and documents to PDF, Convert PDFs to Word, JPEG, PNG, Merge and split PDF files, Add digital signatures and watermarks, Password protection for PDFs, Compress PDF file size, OCR text extraction

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $49.99 | per year |


### Sum

[App page](https://appshunter.io/ios/app/sum-up/id6753583350)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Subscription | $4.99 | per month |
| Yearly Premium Subscription | $35.99 | per year |


## Frequently asked questions

### Is PDF workbench free?

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

### Is Sum free?

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

### Do PDF workbench or Sum have ads?

PDF workbench shows ads; Sum does not.

### Which is updated more often, PDF workbench or Sum?

PDF workbench ships an update every 2 weeks, and Sum every 5 days. Most recently, PDF workbench was updated on October 8, 2026 and Sum on September 30, 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.*