Nia is the marketer for East Coast Sales. She's the project lead for a new smartphone app that will help customers order products more easily. Thanks to Google's advice, their dev team has incorporated many features to boost conversion numbers. Before rolling out the app, they'd like to perform some testing to determine the effectiveness of the personalization features. Which Google service allows them to test the app's UI and features?

Firebase A/B testing tool allows Nia to test the app’s UI and features that will help customers order products more easily.