# yapstudios/YapAnimator

Your fast and friendly physics-based animation system.

Repository: https://github.com/yapstudios/YapAnimator
Canonical: https://ross.abutalabs.com/products/yapanimator
Homepage: https://yapstudios.com
Language: Swift
License: BSD-2-Clause
License Family: permissive
Topics: ios, swift, animation, physics-simulation, motion, design, macos, macosx, mac
Archived: true
Last push: 2026-03-07T18:40:35+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 71, release rhythm 35, longevity 100
- inputs: {"age_days": 3401, "days_push": 179, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1933, forks 76 (observed 2026-08-28T04:05:56.378031+00:00)

## What it is
YapAnimator is a Swift physics-based animation library for iOS and macOS that makes it easy to animate any value representable as an array of Doubles, with interruptable animations, completion blocks, and gesture-driven forces. It is now archived and unmaintained, as Apple's built-in spring animations cover most use cases.

## Use cases
- animate view properties with physics-based springs in swift
- add gesture velocity to interactive transitions
- morph between bezier paths with animation
- animate custom types like colors or volume in ios
- create interruptable animations with completion blocks

## When to choose
- you maintain a legacy iOS/macOS app already using it
- you need physics-based animation of arbitrary Double-representable values on older Apple platforms

## When to avoid
- starting a new project - use SwiftUI's .spring() or UIView spring animations instead
- you need a maintained library with active support
- you target non-Apple platforms

## Facets
- artifact type: library
- maturity: abandoned
- function: animation, ui-components
- domain: mobile-development, frontend, graphics
- platform: -
- tags: physics-based-animation, swift, spring-animations, gesture-driven, archived, ios, macos

## Member repositories
- yapstudios/YapAnimator (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:56.378031+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 2026-08-30T03:08:40.053214+00:00, confidence not recorded.
  - readme: https://github.com/yapstudios/YapAnimator (fetched 2026-08-28T04:05:56.378031+00:00, sha 34c34dbc4572)
  - homepage: https://yapstudios.com (fetched 2026-08-29T10:47:56.282891+00:00, sha 3a5405becf8f)
- Data as of 2026-08-30T08:39:29.467469+00:00.