# The PDF Signer App vs LLM Studio Go

The clearest difference is in-app purchases: The PDF Signer App at none against LLM Studio Go's 1. The PDF Signer App also leads on ads (none vs shown) and iOS requirement (15.1 vs 18.0). On price, update cadence and device support there is nothing between them.

Both are free to download. LLM Studio Go sells 1 one-off in-app purchase. The PDF Signer App asks for nothing beyond the download.

The PDF Signer App ships an update every 4 days, LLM Studio Go every 3 days. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | The PDF Signer App | LLM Studio Go |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 days | **Every 3 days** |
| Size | 23 MB | 124 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Leon Giochais](https://appshunter.io/developer/1896620863) | [Yevhenii Svistunov](https://appshunter.io/developer/6815311116) |

## What reviewers say

### The PDF Signer App

[App page](https://appshunter.io/ios/app/the-pdf-signer-app/id6768983377)

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

**In-app purchases:** none


### LLM Studio Go

[App page](https://appshunter.io/ios/app/llm-studio-go/id6815311113)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads Forever | $9.99 | one-time |


## Frequently asked questions

### Is The PDF Signer App free?

The PDF Signer App is free to download, with no in-app purchases.

### Is LLM Studio Go free?

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

### Do The PDF Signer App or LLM Studio Go have ads?

LLM Studio Go shows ads; The PDF Signer App does not.

### Which is updated more often, The PDF Signer App or LLM Studio Go?

The PDF Signer App ships an update every 4 days, and LLM Studio Go every 3 days. Most recently, The PDF Signer App was updated on October 28, 2026 and LLM Studio Go on October 29, 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.*