# ethylia vs PDFToolbox

The clearest difference is in-app purchases: ethylia at none against PDFToolbox's 3. ethylia also leads on update cadence (every 8 days vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDFToolbox sells 3 in-app purchases, starting at $0.99 per 7 days. ethylia asks for nothing beyond the download.

ethylia ships an update every 8 days, PDFToolbox every 7 months. The most recent releases landed on September 21, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | ethylia | PDFToolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pdftoolbox-converterwatermark/id6744648102/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 7 months |
| Monetization | — | Free with in-app purchases |
| Size | 46 MB | 8 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [SR-CONCEPT](https://appshunter.io/developer/1729143853) | [钊辰 王](https://appshunter.io/developer/1791406641) |

## What reviewers say

### ethylia

[App page](https://appshunter.io/ios/app/ethylia/id6477376728)

**In-app purchases:** none


### PDFToolbox

[App page](https://appshunter.io/ios/app/pdftoolbox-converterwatermark/id6744648102)

This app offers a suite of tools for local PDF processing, including converting PDFs to images and vice versa, adding text watermarks, and encrypting/decrypting documents with passwords. It prioritizes user privacy by performing all operations on the device without internet access.

**Highlights:** Convert PDF to Image (JPG, PNG, GIF), Convert Image to PDF, Add custom text watermarks, Encrypt PDFs with passwords, Remove PDF password protection, Batch export and multi-image processing

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $0.99 | per 7 days |
| Yearly | $9.99 | per year |
| Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is ethylia free?

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

### Is PDFToolbox free?

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

### Do ethylia or PDFToolbox have ads?

Neither ethylia nor PDFToolbox shows ads.

### Which is updated more often, ethylia or PDFToolbox?

ethylia ships an update every 8 days, and PDFToolbox every 7 months. Most recently, ethylia was updated on September 21, 2026 and PDFToolbox on June 1, 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.*