> For the complete documentation index, see [llms.txt](https://freegrow-1.gitbook.io/product-docs-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://freegrow-1.gitbook.io/product-docs-en/en-mobile-kit-n1/uwb-n1-series-guide/installation-guide/device-compatibility-check.md).

# Device Compatibility Check

### In this section 

This section explains how to use the **Check azimuth, elevation** feature to see if your smartphone supports UWB-based direction detection (Azimuth and Elevation).\
In GrowSpace mobile app testing, angle detection support is directly related to RTLS accuracy. So it’s important to check this in advance.

***

### Feature Overview

The **Check azimuth, elevation** menu is a diagnostic tool for Android devices.\
It helps you check whether your smartphone supports UWB-based angle measurement.

<figure><img src="/files/2qmALlw7JbCgZHGqvqvx" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}

* On iOS devices, angle detection is usually enabled by default.
* It works automatically with the RTLS features, so no separate menu is needed.
* This feature is only available on Android, and iPhone users do not need to check it manually.
  {% endhint %}

#### Main Use Cases

* Check if your Android device supports angle detection
* Test detection performance under different distance and direction conditions
* Evaluate if angle-based correction can improve RTLS positioning accuracy

***

### How to Use

1. Launch the GrowSpace mobile app.
2. On the main screen, select **Check azimuth, elevation**.
3. If a powered N1 Anchor is nearby, it will be detected and connected automatically.
4. Once connected, the following information will be shown in real time:
   * **Distance** (m)
   * **Azimuth** (°)
   * **Elevation** (°)

{% hint style="info" %}
Detection performance may vary depending on your smartphone model, sensor quality, UWB firmware, and indoor space layout.
{% endhint %}

***

### Platform and Device Compatibility

#### Android Devices

* On most Galaxy S series devices, only the **Plus (+)** or **Ultra** models support UWB-based angle detection.
* Some models from the Google Pixel series also support this feature.
* You should use the **Check azimuth, elevation** menu to verify if your device supports angle measurement.

**Recommended Android models:**

* Galaxy Note20 Ultra
* Galaxy S21+ / S21 Ultra
* Galaxy S22+ / S22 Ultra
* Galaxy S23+ / S23 Ultra
* Galaxy S24+ / S24 Ultra
* Galaxy S25+ (and future models)
* Galaxy Z Fold2 \~ Z Fold5
* Selected Pixel UWB models

> ⚠️ For **Galaxy S24+**, angle detection may be limited. We recommend testing in advance.

***

iOS Devices

* Most iPhone models from iPhone 11 and up have built-in UWB angle detection.
* This means azimuth and elevation data are used automatically during RTLS measurements, without the need for a **Check azimuth, elevation** menu.
* As a result, this menu is not shown in the iOS app.

**Recommended iPhone models**

* iPhone 11 / 11 Pro / 11 Pro Max
* iPhone 12 \~ 16 series(including Pro models)

***

### Notes

* Whether angle detection works depends on three factors: the built-in UWB chipset, motion sensors, and OS-level permissions.
* Results may vary depending on test conditions such as anchor spacing, signal reflection, and power stability.
* To improve RTLS accuracy, a correction algorithm that considers both distance and angle information may be applied.