# Diffraction Grating Calculator vs Device Detector

The clearest difference is price: Device Detector at Free against Diffraction Grating Calculator's $2.99. Device Detector also leads on update cadence (every 7 months vs every 29 months). Diffraction Grating Calculator's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Device Detector is free to download; Diffraction Grating Calculator costs $2.99 up front. Device Detector sells 1 in-app purchase, starting at $3.99 per 7 days. Diffraction Grating Calculator asks for nothing beyond the download.

Diffraction Grating Calculator ships an update every 29 months, Device Detector every 7 months. The most recent releases landed on September 29, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Diffraction Grating Calculator | Device Detector |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[4.2 (21 ratings)](https://appshunter.io/ios/app/device-detector-find-devices/id6479974403/reviews)** |
| Number of ratings | — | **21** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 29 months | **Every 7 months** |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 22 MB |
| Requires iOS | **13** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [yohan teixeira](https://appshunter.io/developer/488660484) |

## What reviewers say

### Diffraction Grating Calculator

[App page](https://appshunter.io/ios/app/diffraction-grating-calculator/id1413088894)

**Features:** macOS Compatibility

**In-app purchases:** none


### Device Detector

[App page](https://appshunter.io/ios/app/device-detector-find-devices/id6479974403)

Locate misplaced Bluetooth and WiFi devices with real-time tracking. This app helps you find wireless gadgets like headphones and smartwatches by showing their proximity and WiFi connection status, ensuring they are likely still at home.

**Highlights:** Real-Time Radar, Proximity Score in Meters, WiFi Connection Detection, Broad Device Compatibility, Alerts and Notifications, Pin Favorite Devices

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $3.99 | per 7 days |


## Frequently asked questions

### Is Diffraction Grating Calculator free?

Diffraction Grating Calculator costs $2.99, with no in-app purchases.

### Is Device Detector free?

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

### Do Diffraction Grating Calculator or Device Detector have ads?

Device Detector shows ads; Diffraction Grating Calculator does not.

### Which is updated more often, Diffraction Grating Calculator or Device Detector?

Diffraction Grating Calculator ships an update every 29 months, and Device Detector every 7 months. Most recently, Diffraction Grating Calculator was updated on September 29, 2026 and Device Detector on October 13, 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.*