# WattApp vs PDF Extender

The clearest difference is in-app purchases: WattApp at none against PDF Extender's 1. WattApp also leads on iOS requirement (12.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

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

WattApp ships an update every 5 weeks, PDF Extender every 3 weeks. The most recent releases landed on October 27, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | WattApp | PDF Extender |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 1.3 GB | 7 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [b.ReX GmbH](https://appshunter.io/developer/1376474990) | [SB Labs](https://appshunter.io/developer/6808787098) |

## What reviewers say

### WattApp

[App page](https://appshunter.io/ios/app/wattapp/id1621671914)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Extender

[App page](https://appshunter.io/ios/app/pdf-extender/id6808786886)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro freischalten | $2.99 | one-time |


## Frequently asked questions

### Is WattApp free?

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

### Is PDF Extender free?

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

### Do WattApp or PDF Extender have ads?

Neither WattApp nor PDF Extender shows ads.

### Which is updated more often, WattApp or PDF Extender?

WattApp ships an update every 5 weeks, and PDF Extender every 3 weeks. Most recently, WattApp was updated on October 27, 2026 and PDF Extender 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.*