# vicolo-dev/chrono

A modern and powerful clock, alarms, timer and stopwatch app for Android!

Repository: https://github.com/vicolo-dev/chrono
Canonical: https://ross.abutalabs.com/products/vicolo-dev-chrono
Language: Dart
License: GPL-3.0
License Family: copyleft
Topics: alarm, alarm-clock, android, clock, stopwatch, timer
Last push: 2025-01-13T05:03:02+00:00

## Health v2 (maintenance only)
Score: 22/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 1, release rhythm 8, longevity 95
- inputs: {"age_days": 1337, "days_push": 597, "days_rel": 605, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1744, forks 87 (observed 2026-08-28T04:05:30.547579+00:00)

## What it is
Chrono is a modern, open-source clock application for Android offering alarms, timers, stopwatch, and world clock features. It is built with Dart/Flutter and distributed via F-Droid, IzzyOnDroid, and GitHub releases.

## Use cases
- set recurring alarms with custom schedules on android
- use a stopwatch with lap history for workouts
- run multiple timers with presets for cooking or studying
- check world clocks with time differences across cities
- require math or typing tasks to dismiss alarms
- replace the default android clock app with a customizable one

## When to choose
- you want a free, open-source, privacy-friendly clock app on Android
- you need highly customizable alarm schedules, snooze behavior, and alarm tasks
- you prefer Material You theming and multi-language support
- you want multiple timers and stopwatch lap comparisons in one app

## When to avoid
- you need an alarm app on iOS, desktop, or web - it is Android only
- you require fully battle-tested reliability for critical alarms, as the app is still a work in progress
- you need integration with smart home devices or wearables

## Facets
- artifact type: application
- maturity: active
- function: gui, scheduling, date-time
- domain: developer-tools, mobile-development, cross-platform
- platform: cross-platform
- tags: alarm-clock, timer, stopwatch, world-clock, flutter, material-you, open-source-android-app, android, mobile

## Member repositories
- vicolo-dev/chrono (main) score 22

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:30.547579+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 2026-08-30T03:29:31.375880+00:00, confidence not recorded.
  - readme: https://github.com/vicolo-dev/chrono (fetched 2026-08-28T04:05:30.547579+00:00, sha ebcfaa60f3be)
- Data as of 2026-08-30T08:39:29.467469+00:00.