Flutter animations that use tweens or physics-based animations. This also includes any use of AnimationController or implicit animations.
Flutter’s animation support makes it easy to implement a variety of animation types. Many widgets, especially Material widgets, come with the standard motion effects defined in their design spec, but it’s also possible to customize these effects.
Animation types
Animations fall into one of two categories: tween- or physics-based. The following sections explain what these terms mean, and points you to resources where you can learn more. In some cases, the best documentation we currently have is example code in the Flutter gallery.
Tween animation
Short for in-betweening. In a tween animation, the beginning and ending points are defined, as well as a timeline, and a curve that defines the timing and speed of the transition. The framework calculates how to transition from the beginning point to the end point.
Physics-based animation
In physics-based animation, motion is modeled to resemble real-world behavior. When you toss a ball, for example, where and when it lands depends on how fast it was tossed and how far it was from the ground. Similarly, dropping a ball attached to a spring falls (and bounces) differently than dropping a ball attached to a string.
Reference: https://flutter.dev/docs/development/ui/animations
