# timdonnelly/Advance

Physics-based animations for iOS, tvOS, and macOS.

Repository: https://github.com/timdonnelly/Advance
Canonical: https://ross.abutalabs.com/products/advance
Homepage: http://timdonnelly.github.io/Advance/
Language: Swift
License: BSD-2-Clause
License Family: permissive
Topics: animation, swift, physics, gestures, ios, springs, ui, interaction, motion
Archived: true
Last push: 2022-05-16T17:49:30+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3855, "days_push": 1570, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4464, forks 202 (observed 2026-08-28T04:08:50.824120+00:00)

## What it is
Advance is a Swift animation library for iOS, tvOS, and macOS that uses physics-based simulations like springs to drive realistic, interruptible motion. Animations run every frame via CADisplayLink/CVDisplayLink, allowing fine-grained control of values, velocity, tension, and damping at any time.

## Use cases
- animate views with spring physics in swift
- create interruptible physics-based ui animations on ios
- add realistic motion to macos app interactions
- build gesture-driven draggable interfaces with springs
- control animation velocity and damping mid-flight

## When to choose
- you want natural, interruptible spring animations instead of fixed-duration curves
- you need per-frame control over animation state in UIKit or AppKit
- you're building interactive, gesture-driven interfaces on Apple platforms

## When to avoid
- you're on SwiftUI and can use built-in spring APIs
- you need simple one-shot animations with no interactivity
- you need a cross-platform (non-Apple) animation solution

## Facets
- artifact type: library
- maturity: maintenance
- function: animation
- domain: mobile-development, web-design, graphics
- platform: -
- tags: physics-based-animation, springs, gestures, uikit, motion, swift-package, ios, macos, swift

## Member repositories
- timdonnelly/Advance (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:50.824120+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 2026-08-29T18:20:40.128927+00:00, confidence not recorded.
  - readme: https://github.com/timdonnelly/Advance (fetched 2026-08-28T04:08:50.824120+00:00, sha 91335cded3bd)
  - homepage: http://timdonnelly.github.io/Advance/ (fetched 2026-08-29T09:07:16.581646+00:00, sha 36bb0cfc2205)
- Data as of 2026-08-30T08:39:29.467469+00:00.