# Sterna Unigem Operator vs PDF Eddie

The clearest difference is in-app purchases: Sterna Unigem Operator at none against PDF Eddie's 2. Sterna Unigem Operator also leads on iOS requirement (14.0 vs 17.0). PDF Eddie's advantage is update cadence (weekly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. PDF Eddie sells 2 in-app purchases, starting at $2.99 per month. Sterna Unigem Operator asks for nothing beyond the download.

Sterna Unigem Operator ships an update every 2 months, PDF Eddie weekly. The most recent releases landed on September 22, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Sterna Unigem Operator | PDF Eddie |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 44 MB | 14 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 17+ | 4+ |
| Developer | [Sterna Security Devices Private Limited](https://appshunter.io/developer/1751436158) | [NEO INSIGHTS PTE. LTD](https://appshunter.io/developer/1747875073) |

## What reviewers say

### Sterna Unigem Operator

[App page](https://appshunter.io/ios/app/sterna-unigem-operator/id6462632195)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Eddie

[App page](https://appshunter.io/ios/app/pdf-eddie/id6762068602)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Eddie Pro (Monthly) | $2.99 | per month |
| PDF Eddie Pro (Yearly) | $17.99 | per year |


## Frequently asked questions

### Is Sterna Unigem Operator free?

Sterna Unigem Operator is free to download, with no in-app purchases.

### Is PDF Eddie free?

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

### Do Sterna Unigem Operator or PDF Eddie have ads?

Neither Sterna Unigem Operator nor PDF Eddie shows ads.

### Which is updated more often, Sterna Unigem Operator or PDF Eddie?

Sterna Unigem Operator ships an update every 2 months, and PDF Eddie weekly. Most recently, Sterna Unigem Operator was updated on September 22, 2026 and PDF Eddie on October 12, 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.*