On the dashboard, tap the menu on the top left of the screen. Select Category from the menu. Tap the Add Category button at the bottom of the screen.

Type in a category name and link it to a high level category. Choose a name with more than 3 characters. Tap on Create Category to finish adding a custom category.

The category will now be available in all aspects of the app.

On the dashboard, tap the menu on the top left of the screen. Select Category from the menu. Switch between Income and Expense and toggle the category visibility from the eye icon on the right of the category name. 

Updates are done automatically at the moment you toggle it.

This will not remove any of the transactions you’ve already created, it will only hide the category when you create a budget or transaction.