Alright, first things first, log into Adalo with your credentials. You should land on the main dashboard where all your projects are hanging out.

Next, pick the project where you want to add that nifty radio button. Just click on it to open up the Adalo editor.

On the left side of the editor, you'll see the "Components" panel. Click on the "+" icon to dive into the component library.

In the component library, there's a search bar at the top. Type "Radio Button" in there and find it in the search results.

Now, click and drag the Radio Button component to the spot on your screen where you want it. Let go of the mouse button to drop it there.

Click on the Radio Button component to open up the settings on the left. Here, you can add different options for the radio button, like "Option 1," "Option 2," and "Option 3."

In the settings, there's an option to set a default value. Pick the option that should be selected when the user first sees this screen.

To make the radio button actually do something, link it to a data collection. Go to the "Data" tab in the settings and choose the collection field where the selected value should be stored.

Add actions to the radio button if you need to. For example, when a user picks an option, you can trigger actions like navigating to another screen or updating a record. Click on "Add Action" and specify what you want to happen.

Finally, click on the "Preview" button at the top-right corner of the editor to see your app in action. Test the radio button to make sure it works and stores data correctly.

Once you're happy with how everything works, save your changes and publish your app. Your radio button is now live and ready for users to interact with.