# Siren

Notify users when a new version of your app is available and prompt them to upgrade.

Repository: https://github.com/ArtSabintsev/Siren
Canonical: https://ross.abutalabs.com/products/siren
Homepage: http://sabintsev.com/
Language: Swift
License: MIT
License Family: permissive
Topics: swift, alert, cocoapods, alerts, update, swift-package-manager, notify-users
Last push: 2026-08-16T02:08:13+00:00
Link (homepage): http://sabintsev.com/

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 98, longevity 100
- inputs: {"age_days": 4260, "days_push": 18, "days_rel": 18, "gap_med": 2, "n_releases_24m": 4}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4294, forks 411 (observed 2026-08-28T04:08:41.488502+00:00)

## What it is
Siren is a Swift library for iOS and tvOS that checks the installed app version against the App Store and alerts users when a new version is available, prompting them to upgrade. It supports localized alerts, custom UIs, and semantic versioning.

## Use cases
- notify users a new app version is available
- prompt users to upgrade an iOS app
- check App Store version against installed version
- show localized update alerts
- build a custom update prompt UI

## When to choose
- you ship an iOS or tvOS app and want in-app update prompts
- you need localized update alerts with minimal setup
- you want Swift Package Manager or CocoaPods integration

## When to avoid
- you target platforms other than iOS/tvOS
- you need proactive feature development or non-Apple platforms
- you want Android or cross-platform update checking

## Facets
- artifact type: library
- maturity: maintenance
- function: sdk, developer-tools
- domain: mobile-development, developer-tools
- platform: -
- tags: app-update, app-store, upgrade-prompt, version-check, swift-package-manager, cocoapods, ios, swift, mobile

## Member repositories
- ArtSabintsev/Siren (main) score 98
- ArtSabintsev/Harpy (mirror) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:41.488502+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 2026-08-29T18:21:52.802309+00:00, confidence not recorded.
  - readme: https://github.com/ArtSabintsev/Siren (fetched 2026-08-28T04:08:41.488502+00:00, sha 5b6b45e63a63)
  - homepage: http://sabintsev.com/ (fetched 2026-08-29T09:11:02.904729+00:00, sha 7c5daa2f1be8)
- Data as of 2026-08-30T08:39:29.467469+00:00.