# FossifyOrg/Calendar

A simple calendar with events, customizable widgets and no ads.

Repository: https://github.com/FossifyOrg/Calendar
Canonical: https://ross.abutalabs.com/products/fossifyorg-calendar
Homepage: https://www.fossify.org
Language: Kotlin
License: GPL-3.0
License Family: copyleft
Topics: android, calendar, foss, kotlin, open-source
Last push: 2026-08-24T17:45:31+00:00

## Health v2 (maintenance only)
Score: 89/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 71, longevity 100
- inputs: {"age_days": 1571, "days_push": 9, "days_rel": 198, "gap_med": 18, "n_releases_24m": 16}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2124, forks 205 (observed 2026-08-28T04:06:16.635977+00:00)

## What it is
Fossify Calendar is an open-source, ad-free Android calendar app for managing events, reminders, and recurring schedules with customizable home-screen widgets. It syncs with external calendar providers like Google Calendar, Outlook, Nextcloud, and Exchange while keeping data local and private.

## Use cases
- plan events and reminders on android without ads or tracking
- sync my phone calendar with google calendar and nextcloud
- add a customizable calendar widget to my home screen
- import birthdays and holidays into my calendar
- manage recurring events with flexible repetition rules
- replace a proprietary calendar app with a privacy-respecting foss alternative
- filter and switch between daily, weekly, monthly, and yearly calendar views

## When to choose
- you want a private, ad-free calendar on Android with no unnecessary permissions
- you need widgets, themes, and multiple calendar views in a lightweight app
- you want to sync with existing calendar accounts (Google, Outlook, Nextcloud, Exchange)
- you prefer open-source apps available on both Google Play and F-Droid

## When to avoid
- you need a team scheduling or shared calendar service with server-side features
- you need a web or desktop calendar client
- you require advanced task/project management rather than a calendar

## Facets
- artifact type: application
- maturity: stable
- function: scheduling, gui, plugin-system
- domain: developer-tools, mobile-development, privacy, self-hosted
- platform: -
- tags: calendar, foss, no-ads, widgets, kotlin, open-source, reminders, offline-first, android, mobile

## Member repositories
- FossifyOrg/Calendar (main) score 89

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:16.635977+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 2026-08-30T02:52:47.389913+00:00, confidence not recorded.
  - readme: https://github.com/FossifyOrg/Calendar (fetched 2026-08-28T04:06:16.635977+00:00, sha 6aacfda06d0b)
  - homepage: https://www.fossify.org (fetched 2026-08-29T10:32:40.871715+00:00, sha fa043bf3fca5)
  - site_page: https://www.fossify.org/install (fetched 2026-08-29T10:32:40.874000+00:00, sha 6f9f3cd6f1e1)
  - site_page: https://www.fossify.org/about (fetched 2026-08-29T10:32:40.875648+00:00, sha d861722ab53d)
  - site_page: https://www.fossify.org/updates (fetched 2026-08-29T10:32:40.877369+00:00, sha 71f630ac6f9d)
  - site_page: https://www.fossify.org/faq (fetched 2026-08-29T10:32:40.879265+00:00, sha ede0debeafce)
- Data as of 2026-08-30T08:39:29.467469+00:00.