# BendingSpoons/katana-swift

Swift Apps in a Swoosh! A modern framework for creating iOS apps, inspired by Redux.

Repository: https://github.com/BendingSpoons/katana-swift
Canonical: https://ross.abutalabs.com/products/katana-swift
Homepage: http://bendingspoons.com
Language: Swift
License: MIT
License Family: permissive
Topics: ios, swift, ui, redux, katana
Archived: true
Last push: 2022-11-08T10:17:51+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3676, "days_push": 1394, "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 2233, forks 92 (observed 2026-08-28T04:06:29.221301+00:00)

## What it is
Katana is a Swift framework for structuring iOS app business logic in a Redux-inspired, unidirectional data flow, where a single serializable state is updated only via dispatched StateUpdaters. It was used in production by Bending Spoons but the team has since migrated to The Composable Architecture.

## Use cases
- manage ios app state with redux pattern
- unidirectional data flow in swift
- testable business logic for ios apps
- centralized app state container in swift
- predictable state updates in mobile apps

## When to choose
- building a small or medium-sized ios app that fits a redux-style architecture
- you want a single serializable app state with ordered, testable updates
- you prefer a lightweight swift-native alternative to redux patterns

## When to avoid
- starting a new large ios project needing modular architecture (authors recommend The Composable Architecture)
- you need a framework under active development
- your app targets platforms other than ios

## Facets
- artifact type: framework
- maturity: maintenance
- function: state-management, ui-components
- domain: mobile-development, frontend
- platform: -
- tags: redux-inspired, unidirectional-data-flow, swift, ios-apps, business-logic, ios, mobile

## Member repositories
- BendingSpoons/katana-swift (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:29.221301+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 2026-08-30T02:44:23.610180+00:00, confidence not recorded.
  - readme: https://github.com/BendingSpoons/katana-swift (fetched 2026-08-28T04:06:29.221301+00:00, sha b45b37843fd1)
  - homepage: http://bendingspoons.com (fetched 2026-08-29T10:24:55.660729+00:00, sha 81ff03e610fd)
- Data as of 2026-08-30T08:39:29.467469+00:00.