# Third Eye Locks vs Image to PDF Converter

The clearest difference is in-app purchases: Third Eye Locks at none against Image to PDF Converter's 3. Image to PDF Converter's advantage is update cadence (weekly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Image to PDF Converter sells 3 in-app purchases, starting at $6.99 per 7 days. Third Eye Locks asks for nothing beyond the download.

Third Eye Locks ships an update every 4 months, Image to PDF Converter weekly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Third Eye Locks | Image to PDF Converter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Size | 9 MB | 40 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | +4 |
| Developer | [Third Eye Info Technology](https://appshunter.io/developer/1550298991) | [erhan bizden](https://appshunter.io/developer/1758639592) |

## What reviewers say

### Third Eye Locks

[App page](https://appshunter.io/ios/app/third-eye-locks/id1550298989)

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

**In-app purchases:** none


### Image to PDF Converter

[App page](https://appshunter.io/ios/app/image-to-pdf-converter-scans/id6749085643)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Weekly Free | $6.99 | per 7 days |
| Annual | $29.99 | per year |


## Frequently asked questions

### Is Third Eye Locks free?

Third Eye Locks is free to download, with no in-app purchases.

### Is Image to PDF Converter free?

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

### Do Third Eye Locks or Image to PDF Converter have ads?

Neither Third Eye Locks nor Image to PDF Converter shows ads.

### Which is updated more often, Third Eye Locks or Image to PDF Converter?

Third Eye Locks ships an update every 4 months, and Image to PDF Converter weekly. Most recently, Third Eye Locks was updated on November 3, 2026 and Image to PDF Converter on October 30, 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.*