# artsy/eigen

The Art World in Your Pocket or Your Trendy Tech Company's Tote, Artsy's mobile app.

Repository: https://github.com/artsy/eigen
Canonical: https://ross.abutalabs.com/products/eigen
Language: TypeScript
License: MIT
License Family: permissive
Topics: objective-c, swift, app-store, app, react-native, ios, android, art
Last push: 2026-08-26T20:21:07+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 97, longevity 100
- inputs: {"age_days": 4241, "days_push": 7, "days_rel": 20, "gap_med": 3.0, "n_releases_24m": 51}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3775, forks 592 (observed 2026-08-28T04:08:18.256987+00:00)

## What it is
Eigen is Artsy's official mobile app for iOS and Android, providing access to the world's largest online art marketplace. It is a production React Native application with Objective-C/Swift roots, developed open-source by Artsy.

## Use cases
- browse and discover artworks on mobile
- buy art through the Artsy marketplace
- follow artists and galleries
- bid in auctions from a phone
- study how a large production React Native app is structured
- learn Artsy's mobile engineering practices

## When to choose
- you want the Artsy art marketplace as a mobile app
- you want to study or contribute to a real-world large-scale React Native codebase
- you need a reference for mixing Swift/Objective-C with React Native

## When to avoid
- you need a reusable library or framework rather than a specific consumer app
- you want a small example project - this is a large production codebase
- you need an app unrelated to art or the Artsy platform

## Facets
- artifact type: application
- maturity: active
- function: mobile-framework, frontend-framework
- domain: mobile-development, e-commerce, cross-platform
- platform: -
- tags: react-native, art-marketplace, objective-c, swift, open-source-app, art, ios, android, mobile

## Member repositories
- artsy/eigen (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:18.256987+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 2026-08-29T18:27:49.955140+00:00, confidence not recorded.
  - readme: https://github.com/artsy/eigen (fetched 2026-08-28T04:08:18.256987+00:00, sha ceb7af89a20a)
- Data as of 2026-08-30T08:39:29.467469+00:00.