What types of testing would you implement when creating an application from scratch?

When creating an iOS application from scratch, I would implement the following types of testing:

• Unit tests — testing individual functions and classes to ensure that the logic works correctly.
• UI tests (instrumentation tests) — automated testing of the user interface to verify user interaction with the app.
• Integration tests — testing the interaction between modules, for example, between the network and UI.
• Smoke tests — basic checks to ensure the app launches and core functions work.
• Performance tests — measuring performance to avoid lag and memory leaks.
• Testing on different devices and iOS versions — to ensure compatibility.

This set of tests will help ensure the quality and stability of the app at various stages of development.