What is the most trustworthy trading app?

When it comes to finding the most trustworthy trading app, what factors should one consider? Is it the reputation of the app among users and experts in the field? Or is it the security measures put in place to protect users' funds and data? Furthermore, what about the app's regulatory compliance and the ease of use it offers? With so many options available, how can one determine which trading app truly deserves the title of "most trustworthy"?