# 得理律助 vs PDF Tools

The clearest difference is ads: 得理律助 at none against PDF Tools's shown. 得理律助 also leads on iOS requirement (13.0 vs 16.6). PDF Tools's advantage is update cadence (every 4 days vs every 3 weeks). On price, in-app purchases and device support there is nothing between them.

Both are free to download. 得理律助 sells 1 in-app purchase, starting at $144.99 per year and PDF Tools sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

得理律助 ships an update every 3 weeks, PDF Tools every 4 days. Both last shipped on October 27, 2026.

## The numbers

| Metric | 得理律助 | PDF Tools |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 122 MB | 46 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [深圳得理科技有限公司](https://appshunter.io/developer/1512357116) | [少泽 梁](https://appshunter.io/developer/897112791) |

## What reviewers say

### 得理律助

[App page](https://appshunter.io/ios/app/id1622777222)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 个人版连续包年 | $144.99 | per year |


### PDF Tools

[App page](https://appshunter.io/ios/app/pdf-tools-split-merge-comp/id6787011787)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month VIP | $2.99 | per month |
| One-year membership | $4.99 | per year |
| Permanent VIP | $12.99 | one-time |


## Frequently asked questions

### Is 得理律助 free?

得理律助 is free to download, with in-app purchases available.

### Is PDF Tools free?

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

### Do 得理律助 or PDF Tools have ads?

PDF Tools shows ads; 得理律助 does not.

### Which is updated more often, 得理律助 or PDF Tools?

得理律助 ships an update every 3 weeks, and PDF Tools every 4 days. Most recently, 得理律助 was updated on October 27, 2026 and PDF Tools on October 27, 2026.

---

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