# Installing a Custom App

## Installing SDK Platform-Tools

Ensure you have latest [platform-tools](https://developer.android.com/studio/releases/platform-tools) installed on your computer system.

If you do not have the SDK "platform-tools" installed on your computer, download it from this link and keep track where the the "platform-tools" folder is located:

{% embed url="<https://developer.android.com/studio/releases/platform-tools>" %}

## Connect the HereLink Blue to a computer

Enable "Developer Mode" on the DataLink by navigating to `Settings`->`About Phone`->`Build Number` and tap at least 7 times on "Build Number."

![](/files/3Z0ovH06gzcAhXOkl6E1)

![](/files/yhfg2ieOKMsBPbvFDT9X)

![](/files/lL7vzP1FDk83uXmN9wmp)

Enable `Settings`->`Developer options`->`USB debugging`

![](/files/09EVkKUKQ60dObdDFfqd)

![](/files/18n5R1Jwbz9qr4Y45s1T)

Using a USB to Micro USB cable, plug the HereLink Blue into a computer and open the computer's terminal command line

![](/files/KuH5snZmbZyMv9MPLjhw)

## Open the Terminal <a href="#open-the-terminal" id="open-the-terminal"></a>

For Windows, navigate to the "platform-tools" folder. In this folder, hold **down Shift and then right-click**. From the menu select the “**Open Command window here**” option. If the option to open the command window is not available, then click on the "open PowerShell window here".<br>

![](https://docs.union-robotics.com/~/files/v0/b/gitbook-28427.appspot.com/o/assets%2F-MTS1Xx6Kx3fwJFjqpWk%2F-MUUbr0dnuRHkGpp73qV%2F-MUUkDY9A-6Upvid92Q7%2FClick-on-the-%E2%80%9COpen-PowerShell-window-here%E2%80%9D-1024x731-1.png?alt=media\&token=28273723-a0ed-48ce-9f01-9c486bfe446d)

For Mac, navigate to the "platform-tools" folder. **Right Click** the folder and select  `Services`->`New Terminal at Folder`

![](/files/NdsYpdfKP446Za56YTY6)

## Check if the unit is connected

Using the computer's terminal, check it the device is connected via the adb command protocol:

Mac:

```
adb devices

```

![](/files/of2gjAUEM8AZb9y3ZXOG)

Windows:

```
.\adb devices

```

![](/files/UaFwLRGKxxtLPIbetYNg)

## Installing .apk using adb

Move the .apk file to the SDK "platform-tools" folder on your computer

![](/files/2tEduF53vVFJrGY9l0lp)

##

Install the .apk using `adb install <app_name>.apk` in your computers terminal

Mac:

```
adb install <app_name>.apk

```

![Mac adb install](/files/ibbC3HChQzGd1swDrzTK)

Windows:

```
.\adb install <app_name>.apk

```

![Windows .\adb install](/files/x4gFmF0bvloZhjNJTskE)

The new app should now appear in the app launcher's list.

![](/files/3f2CnqBzh3Wo0JtfFFlN)

![](/files/BNDchv4lTvTEaaYInFFP)

## Uninstall an app using adb

To remove the app use `adb remove org.myorg.appname`

```
$ adb remove org.myorg.appname
Success
```


---

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