# PDF Tool App vs Fast Message

The clearest difference is update cadence: Fast Message at every 5 days against PDF Tool App's every 2 months. PDF Tool App's advantage is iOS requirement (10.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PDF Tool App ships an update every 2 months, Fast Message every 5 days. The most recent releases landed on October 15, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | PDF Tool App | Fast Message |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/pdf-tool-app/id1348673464/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 38 MB | 83 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [洪彬 林](https://appshunter.io/developer/1199790281) | [iComet](https://appshunter.io/developer/408908544) |

## What reviewers say

### PDF Tool App

[App page](https://appshunter.io/ios/app/pdf-tool-app/id1348673464)

A lightweight and fast PDF reader with a clean interface. It offers automatic progress saving and multiple viewing modes for documents. File management features allow easy transfer from PC.

**Highlights:** Fast PDF opening, Automatic reading progress save, Book collection and table view modes, File transfer via Wi-Fi or cable, Lightweight and stable performance

**In-app purchases:** none


### Fast Message

[App page](https://appshunter.io/ios/app/fast-message-chat-any-number/id1493016167)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Tool App free?

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

### Is Fast Message free?

Fast Message is free to download, with no in-app purchases.

### Do PDF Tool App or Fast Message have ads?

Neither PDF Tool App nor Fast Message shows ads.

### Which is updated more often, PDF Tool App or Fast Message?

PDF Tool App ships an update every 2 months, and Fast Message every 5 days. Most recently, PDF Tool App was updated on October 15, 2026 and Fast Message on October 20, 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.*