David has prioritized a list of things to test for their business, MachineBeast. The goal is to improve the user experience while letting the user accomplish what they want in MachineBeast’s app. Which of the following is a testing tool that David can use for MachineBeast’s app?

David can use Firebase A/B testing tool for MachineBeast’s app to improve the user experience while letting the user accomplish what they want in MachineBeast’s app.