# Spy PDF vs PDF Studio

The clearest difference is in-app purchases: Spy PDF at none against PDF Studio's 2. Spy PDF also leads on iOS requirement (13.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. PDF Studio sells 2 in-app purchases, starting at $9.99 per year. Spy PDF asks for nothing beyond the download.

## The numbers

| Metric | Spy PDF | PDF Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Size | 32 MB | 6 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [JAEMIN LEE](https://appshunter.io/developer/1787329213) | [Birkan Aksoy](https://appshunter.io/developer/1626910993) |

## What reviewers say

### Spy PDF

[App page](https://appshunter.io/ios/app/spy-pdf-pdf-viewer/id6780379740)

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

**In-app purchases:** none


### PDF Studio

[App page](https://appshunter.io/ios/app/pdf-studio-reader-and-tools/id6781038759)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Studio Pro | $9.99 | per year |
| PDF Studio Pro (Lifetime) | $24.99 | one-time |


## Frequently asked questions

### Is Spy PDF free?

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

### Is PDF Studio free?

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

### Do Spy PDF or PDF Studio have ads?

Neither Spy PDF nor PDF Studio shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*