# SimpleMobileTools/Simple-Calendar

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

Repository: https://github.com/SimpleMobileTools/Simple-Calendar
Canonical: https://ross.abutalabs.com/products/simple-calendar
Homepage: https://www.simplemobiletools.com
Language: Kotlin
License: GPL-3.0
License Family: copyleft
Topics: calendar, android, android-development, open-source, freedom, kotlin
Last push: 2024-06-26T15:37:04+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3872, "days_push": 798, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3650, forks 1166 (observed 2026-08-28T04:08:13.038374+00:00)

## What it is
Simple Calendar is a free, open-source, offline-first calendar app for Android with events, tasks, reminders, customizable colors, and home screen widgets. It supports CalDAV syncing with Google Calendar, Outlook, Nextcloud, and Exchange, plus .ics import/export, with no ads or unnecessary permissions.

## Use cases
- plan my day with a simple offline calendar app on android
- schedule recurring events and appointment reminders without ads
- sync my calendar with google calendar or nextcloud via caldav
- add a customizable calendar widget to my android home screen
- export and import calendar events as ics files
- manage birthdays, holidays, and weekly agenda privately offline

## When to choose
- you want a privacy-focused, ad-free calendar on Android that works fully offline
- you need CalDAV sync with Google Calendar, Outlook, or Nextcloud
- you want highly customizable themes, colors, and widgets
- you prefer open-source software with no tracking or unnecessary permissions

## When to avoid
- you need an iOS, desktop, or web calendar client
- you require deep collaboration features like shared team calendars with real-time editing
- you want built-in email or task-project management beyond simple events and tasks

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

## Member repositories
- SimpleMobileTools/Simple-Calendar (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:13.038374+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 2026-08-29T18:31:41.488334+00:00, confidence not recorded.
  - readme: https://github.com/SimpleMobileTools/Simple-Calendar (fetched 2026-08-28T04:08:13.038374+00:00, sha 909a3b6ab638)
  - homepage: https://www.simplemobiletools.com (fetched 2026-08-29T09:25:54.069113+00:00, sha 1a9240984e31)
- Data as of 2026-08-30T08:39:29.467469+00:00.