# Scan to PDF vs Device Tracker. Air Detector

The clearest difference is monetization model: Device Tracker. Air Detector at free with in-app purchases against Scan to PDF's subscription. Device Tracker. Air Detector also leads on update cadence (daily vs weekly). Scan to PDF's advantage is rating (4.6 vs 4.1) and device support (3 vs 1). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Scan to PDF sells 3 in-app purchases, starting at $4.99 per 7 days and Device Tracker. Air Detector sells 3 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Scan to PDF holds the better App Store score, 4.6 against 4.1. Both are backed by a comparable volume of ratings — 18 and 21 respectively.

Scan to PDF ships an update weekly, Device Tracker. Air Detector daily. The most recent releases landed on June 6, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Scan to PDF | Device Tracker. Air Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (18 ratings)](https://appshunter.io/ios/app/scan-to-pdf-document-scanner/id6739254661/reviews)** | [4.1 (21 ratings)](https://appshunter.io/ios/app/device-tracker-air-detector/id6739941590/reviews) |
| Number of ratings | 18 | **21** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 43 MB | 27 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Richard Davis](https://appshunter.io/developer/1775416462) | [PIXEL QUEST LIMITED](https://appshunter.io/developer/1796137540) |

## What reviewers say

### Scan to PDF

[App page](https://appshunter.io/ios/app/scan-to-pdf-document-scanner/id6739254661)

Transform your phone into a portable scanner and PDF editor. Easily capture documents, convert them to high-quality PDFs, edit text and images, and secure your files with encryption. Seamlessly integrate with cloud storage for efficient document management.

**Highlights:** Scan documents to PDF, Edit PDF text and images, OCR for text recognition, Secure files with encryption, Cloud storage integration

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Scanner | $4.99 | per 7 days |
| Premium Scanner | $6.99 | per 7 days |
| Premium Scanner | $19.99 | per year |


### Device Tracker. Air Detector

[App page](https://appshunter.io/ios/app/device-tracker-air-detector/id6739941590)

Locate misplaced Bluetooth devices quickly and easily. The app detects signals, calculates distance, and guides you with a radar pointer to find your lost items.

**Highlights:** Bluetooth device detection, Distance calculation, Radar pointer guidance, Lost device finder, Speed and accuracy focused

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Trial Subscription | $6.99 | per 7 days |
| Weekly Subscription | $6.99 | per 7 days |
| One Time In-App Purchase | $4.99 | one-time |


## Frequently asked questions

### Is Scan to PDF free?

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

### Is Device Tracker. Air Detector free?

Device Tracker. Air Detector is free to download, with in-app purchases available.

### Which has better reviews, Scan to PDF or Device Tracker. Air Detector?

Scan to PDF is rated higher. Scan to PDF averages 4.6 out of 5 from 18 ratings, while Device Tracker. Air Detector averages 4.1 from 21 ratings.

### Do Scan to PDF or Device Tracker. Air Detector have ads?

Neither Scan to PDF nor Device Tracker. Air Detector shows ads.

### Which is updated more often, Scan to PDF or Device Tracker. Air Detector?

Scan to PDF ships an update weekly, and Device Tracker. Air Detector daily. Most recently, Scan to PDF was updated on June 6, 2026 and Device Tracker. Air Detector on September 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.*