# PDF Scanner vs OBD Compass

The clearest difference is update cadence: PDF Scanner at every 10 days against OBD Compass's monthly. OBD Compass's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PDF Scanner ships an update every 10 days, OBD Compass monthly. The most recent releases landed on October 4, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | PDF Scanner | OBD Compass |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | Free | — |
| Size | 95 MB | 25 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iDroid App](https://appshunter.io/developer/1033189582) | [HK TOPDON TECHNOLOGY Co., LIMITED](https://appshunter.io/developer/1846276192) |

## What reviewers say

### PDF Scanner

[App page](https://appshunter.io/ios/app/pdf-scanner-ocr-scan-app/id1286272447)

Turn your iPhone into a portable scanner to capture documents, receipts, and IDs. Extract text with OCR and organize your scans with folders. Export files as PDFs or JPEGs and share them easily.

**Highlights:** Smart document edge detection, OCR text extraction, Multi-page PDF creation, Organize scans with folders, Export as PDF or JPEG, Share via cloud services

**In-app purchases:** none


### OBD Compass

[App page](https://appshunter.io/ios/app/obd-compass/id6758076036)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Scanner free?

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

### Is OBD Compass free?

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

### Do PDF Scanner or OBD Compass have ads?

Neither PDF Scanner nor OBD Compass shows ads.

### Which is updated more often, PDF Scanner or OBD Compass?

PDF Scanner ships an update every 10 days, and OBD Compass monthly. Most recently, PDF Scanner was updated on October 4, 2026 and OBD Compass on October 14, 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.*