# PDF Tools vs Modysign

The clearest difference is ads: Modysign at none against PDF Tools's shown. Modysign also leads on update cadence (every 4 days vs every 5 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Tools sells 2 in-app purchases, starting at $2.99 per 7 days and Modysign sells 1 in-app purchase, starting at $2.00 per month. Whichever you choose, the download price is not the number that matters.

PDF Tools ships an update every 5 months, Modysign every 4 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PDF Tools | Modysign |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 4 days** |
| Size | 5 MB | 3 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [云峰 林](https://appshunter.io/developer/1740866485) | [Romain Fernandes lopes](https://appshunter.io/developer/1893140467) |

## What reviewers say

### PDF Tools

[App page](https://appshunter.io/ios/app/pdf-tools-merge-split-edit/id6738097501)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Assistant Weekly VIP+Trial | $2.99 | per 7 days |
| PDF Assistant Permanent VIP | $3.99 | one-time |


### Modysign

[App page](https://appshunter.io/ios/app/modysign-sign-and-edit-pdfs/id6762151674)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mody-Sign Premium Monthly | $2.00 | per month |


## Frequently asked questions

### Is PDF Tools free?

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

### Is Modysign free?

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

### Do PDF Tools or Modysign have ads?

PDF Tools shows ads; Modysign does not.

### Which is updated more often, PDF Tools or Modysign?

PDF Tools ships an update every 5 months, and Modysign every 4 days. Most recently, PDF Tools was updated on October 25, 2026 and Modysign 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.*