# roberthein/Ease

It's magic.

Repository: https://github.com/roberthein/Ease
Canonical: https://ross.abutalabs.com/products/ease
Language: Swift
License: MIT
License Family: permissive
Topics: swift, ease, easing, event, events, animation, animations, system, observe, observer, observer-pattern, observable, observables, spring, scenekit, gyroscope, uiscrollview, swift5, swift-5, spring-animation
Last push: 2020-07-14T19:30:10+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3185, "days_push": 2241, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1262, forks 41 (observed 2026-08-28T04:04:10.337280+00:00)

## What it is
Ease is a Swift library providing an event-driven animation system that combines the observer pattern with custom spring animations. It lets you animate any value type with natural spring behavior, updating trajectories dynamically as target values change.

## Use cases
- animate view positions with spring physics in iOS
- add spring behavior to any value change in Swift
- create gesture-following animations that update in real time
- animate SceneKit 3D objects with springs
- observe value changes and drive animations from them

## When to choose
- you need spring animations on arbitrary value types in iOS apps
- you want animation targets that update fluidly during gestures
- you prefer a lightweight observer-based animation API over heavy frameworks

## When to avoid
- you need cross-platform or Android animations
- your project targets platforms beyond iOS 9+ UIKit/SceneKit
- you need keyframe or timeline-based animation rather than springs

## Facets
- artifact type: library
- maturity: maintenance
- function: animation, state-management
- domain: mobile-development, graphics
- platform: -
- tags: spring-animation, observer-pattern, uikit, scenekit, event-driven, ios, swift, mobile

## Member repositories
- roberthein/Ease (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:10.337280+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T05:04:14.965317+00:00, confidence not recorded.
  - readme: https://github.com/roberthein/Ease (fetched 2026-08-28T04:04:10.337280+00:00, sha 7aa0f087725a)
- Data as of 2026-08-30T08:39:29.467469+00:00.