# Device Tracker. Air Detector vs eSign

The clearest difference is rating: eSign at 4.6 against Device Tracker. Air Detector's 4.1. Device Tracker. Air Detector's advantage is update cadence (daily vs every 3 days). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Device Tracker. Air Detector sells 3 in-app purchases, starting at $6.99 per 7 days and eSign sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

eSign holds the better App Store score, 4.6 against 4.1. Both are backed by a comparable volume of ratings — 21 and 28 respectively.

Device Tracker. Air Detector ships an update daily, eSign every 3 days. The most recent releases landed on September 30, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Device Tracker. Air Detector | eSign |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (21 ratings)](https://appshunter.io/ios/app/device-tracker-air-detector/id6739941590/reviews) | **[4.6 (28 ratings)](https://appshunter.io/ios/app/esign-sign-pdf-and-docs/id6740799205/reviews)** |
| Number of ratings | 21 | **28** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 27 MB | 29 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [PIXEL QUEST LIMITED](https://appshunter.io/developer/1796137540) | [Brandon Doyle](https://appshunter.io/developer/1763015964) |

## What reviewers say

### 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 |


### eSign

[App page](https://appshunter.io/ios/app/esign-sign-pdf-and-docs/id6740799205)

Digitally sign PDFs and documents quickly and securely from your mobile device. Upload files, add your signature, text, or initials, and export signed documents instantly without printing or scanning.

**Highlights:** Sign PDFs and documents digitally, Create and save signatures, Add text, initials, and dates, Scan documents with camera, Export and share signed files, Secure and easy interface

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Trial Subscription | $6.99 | per 7 days |
| Weekly Subscription | $6.99 | per 7 days |


## Frequently asked questions

### Is Device Tracker. Air Detector free?

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

### Is eSign free?

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

### Which has better reviews, Device Tracker. Air Detector or eSign?

eSign is rated higher. Device Tracker. Air Detector averages 4.1 out of 5 from 21 ratings, while eSign averages 4.6 from 28 ratings.

### Do Device Tracker. Air Detector or eSign have ads?

Neither Device Tracker. Air Detector nor eSign shows ads.

### Which is updated more often, Device Tracker. Air Detector or eSign?

Device Tracker. Air Detector ships an update daily, and eSign every 3 days. Most recently, Device Tracker. Air Detector was updated on September 30, 2026 and eSign 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.*