# PDF Universal vs Water Boy

The clearest difference is in-app purchases: Water Boy at none against PDF Universal's 1. PDF Universal's advantage is update cadence (every 2 days vs every 5 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Universal sells 1 one-off in-app purchase. Water Boy asks for nothing beyond the download.

PDF Universal ships an update every 2 days, Water Boy every 5 days. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | PDF Universal | Water Boy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 2 days** | Every 5 days |
| Size | 51 MB | 44 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AMARDEEP DHILLON](https://appshunter.io/developer/999752727) | [Norvi Net Technology Co., Ltd.](https://appshunter.io/developer/1700811855) |

## What reviewers say

### PDF Universal

[App page](https://appshunter.io/ios/app/pdf-universal/id6499565745)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $2.99 | one-time |


### Water Boy

[App page](https://appshunter.io/ios/app/water-boy/id6736733162)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PDF Universal free?

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

### Is Water Boy free?

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

### Do PDF Universal or Water Boy have ads?

Both PDF Universal and Water Boy show ads.

### Which is updated more often, PDF Universal or Water Boy?

PDF Universal ships an update every 2 days, and Water Boy every 5 days. Most recently, PDF Universal was updated on October 6, 2026 and Water Boy on October 9, 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.*