3D Touch is an Apple technology (introduced with the iPhone 6s) that recognized the pressure applied to the screen, offering context menus and quick actions (Peek & Pop, Quick Actions) for instant access to app functions and content, turning the keyboard into a trackpad and providing pressure sensitivity for drawing.
This pressure sensor can also turn a compatible iPhone into an experimental 3D Touch scale for lightweight objects.
The true successor to 3D Touch is Haptic Touch technology, first introduced with the iPhone XR. It mimics the behavior of 3D Touch but operates on a different principle: instead of measuring the pressure of a press, the system analyzes the duration of a finger hold on the screen, complementing the action with precise vibration feedback. In this way, Apple simplified the mechanism while preserving the convenience of contextual controls.