# PDF Editor vs Søby Predictive Maintenance

The clearest difference is in-app purchases: Søby Predictive Maintenance at none against PDF Editor's 3. PDF Editor's advantage is update cadence (every 2 months vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Editor sells 3 in-app purchases, starting at $3.99 per 7 days. Søby Predictive Maintenance asks for nothing beyond the download.

PDF Editor ships an update every 2 months, Søby Predictive Maintenance every 6 months. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | PDF Editor | Søby Predictive Maintenance |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (67 ratings)](https://appshunter.io/ios/app/pdf-editor-edit-text/id6445966378/reviews)** | — |
| Number of ratings | **67** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Freemium | — |
| Size | 74 MB | 67 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alex Gameli Heyman](https://appshunter.io/developer/1529812783) | [Aarhus Universitet](https://appshunter.io/developer/1160146447) |

## What reviewers say

### PDF Editor

[App page](https://appshunter.io/ios/app/pdf-editor-edit-text/id6445966378)

This app offers robust PDF editing and compression tools, allowing you to reduce file sizes by up to 90% while preserving quality. It also provides features for annotating, filling forms, signing documents, and managing PDFs.

**Highlights:** Powerful PDF compression up to 90%, Edit text, add annotations, and shapes, Fill forms and add digital signatures, Highlight, underline, and strikethrough text, Split, merge, and convert documents, Scan documents using your camera

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly PDF Editor | $3.99 | per 7 days |
| Monthly PDF Editor | $9.99 | per month |
| PDF one time Edit | $2.99 | one-time |


### Søby Predictive Maintenance

[App page](https://appshunter.io/ios/app/sby-predictive-maintenance/id6753162628)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Editor free?

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

### Is Søby Predictive Maintenance free?

Søby Predictive Maintenance is free to download, with no in-app purchases.

### Do PDF Editor or Søby Predictive Maintenance have ads?

Neither PDF Editor nor Søby Predictive Maintenance shows ads.

### Which is updated more often, PDF Editor or Søby Predictive Maintenance?

PDF Editor ships an update every 2 months, and Søby Predictive Maintenance every 6 months. Most recently, PDF Editor was updated on October 5, 2026 and Søby Predictive Maintenance on October 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.*