# PTattoo vs PDF Scanner Assistant

The clearest difference is price: PTattoo at Free against PDF Scanner Assistant's $0.99. PTattoo also leads on iOS requirement (12.0 vs 16.6). PDF Scanner Assistant's advantage is update cadence (monthly vs every 5 months). On ads, in-app purchases and device support there is nothing between them.

PTattoo is free to download; PDF Scanner Assistant costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PTattoo ships an update every 5 months, PDF Scanner Assistant monthly. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | PTattoo | PDF Scanner Assistant |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Size | 72 MB | 9 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [震 张](https://appshunter.io/developer/1226840578) | [乐祥 胡](https://appshunter.io/developer/1572365721) |

## What reviewers say

### PTattoo

[App page](https://appshunter.io/ios/app/ptattoo/id6648774841)

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

**In-app purchases:** none


### PDF Scanner Assistant

[App page](https://appshunter.io/ios/app/pdf-scanner-assistant/id6747924395)

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

**In-app purchases:** none


## Frequently asked questions

### Is PTattoo free?

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

### Is PDF Scanner Assistant free?

PDF Scanner Assistant costs $0.99, with no in-app purchases.

### Do PTattoo or PDF Scanner Assistant have ads?

Neither PTattoo nor PDF Scanner Assistant shows ads.

### Which is updated more often, PTattoo or PDF Scanner Assistant?

PTattoo ships an update every 5 months, and PDF Scanner Assistant monthly. Most recently, PTattoo was updated on October 10, 2026 and PDF Scanner Assistant on October 12, 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.*