# PDF Pro vs Sigmy

The clearest difference is ads: Sigmy at none against PDF Pro's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. PDF Pro sells 7 in-app purchases, starting at $5.99 per 7 days and Sigmy sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

PDF Pro ships an update every 9 days, Sigmy every 2 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PDF Pro | Sigmy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pdf-pro-doc-and-mark/id6738903272/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 3.2 GB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [APPSKY HONG KONG LIMITED](https://appshunter.io/developer/1629849302) | [SIGMY GROUP PTY LTD](https://appshunter.io/developer/1894404124) |

## What reviewers say

### PDF Pro

[App page](https://appshunter.io/ios/app/pdf-pro-doc-and-mark/id6738903272)

This app is a comprehensive document management tool for handling PDFs and other file types. It allows users to scan, annotate, sign, merge images into PDFs, and quickly search and favorite files. Enjoy efficient mobile productivity with a user-friendly interface.

**Highlights:** Multi-format document support (PDF, Word, Excel, PPT), Scan documents to PDF, Annotate PDFs with highlighting and drawing, Digitally sign documents, Merge images into PDF, Quick file search and favorites

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Pro | $5.99 | per 7 days |
| PDF Pro | $6.99 | per 7 days |
| PDF Pro | $6.99 | per 7 days |
| PDF Pro | $19.99 | per month |
| PDF Pro | $49.99 | per year |
| PDF Pro | $59.99 | per year |
| PDF Pro | $59.99 | per year |


### Sigmy

[App page](https://appshunter.io/ios/app/sigmy/id6762498646)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $5.99 | per month |
| Pro Yearly | $39.99 | per year |
| Lifetime Pro | $79.99 | one-time |


## Frequently asked questions

### Is PDF Pro free?

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

### Is Sigmy free?

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

### Do PDF Pro or Sigmy have ads?

PDF Pro shows ads; Sigmy does not.

### Which is updated more often, PDF Pro or Sigmy?

PDF Pro ships an update every 9 days, and Sigmy every 2 weeks. Most recently, PDF Pro was updated on October 30, 2026 and Sigmy on October 31, 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.*