# bitfireAT/davx5-ose

DAVx⁵ is an open-source CalDAV/CardDAV suite and sync app for Android. You can also access your online files (WebDAV) with it.

Repository: https://github.com/bitfireAT/davx5-ose
Canonical: https://ross.abutalabs.com/products/davx5-ose
Homepage: https://www.davx5.com
Language: Kotlin
License: GPL-3.0
License Family: copyleft
Topics: caldav, carddav, webdav, contacts, calendars, tasks, android, privacy, sync, hilt-android
Last push: 2026-08-24T14:37:22+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 96, longevity 100
- inputs: {"age_days": 1760, "days_push": 9, "days_rel": 30, "gap_med": 16, "n_releases_24m": 32}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2829, forks 131 (observed 2026-08-28T04:07:24.259131+00:00)

## What it is
DAVx⁵ is an open-source Android app that synchronizes contacts, calendars, and tasks with CalDAV/CardDAV servers and provides live WebDAV file access. It is privacy-focused, works with self-hosted and commercial servers, and integrates seamlessly with Android's native calendar and contacts apps.

## Use cases
- sync android contacts with a nextcloud carddav server
- sync calendars between android and a self-hosted caldav server
- access webdav cloud files on android
- sync tasks with caldav vtodo
- replace google contacts/calendar sync with a privacy-friendly option
- connect android to radicale or baikal servers

## When to choose
- you want two-way CalDAV/CardDAV sync on Android with a self-hosted or privacy-respecting server
- you need WebDAV file access integrated into Android's Storage Access Framework
- you want an open-source, actively maintained sync client with wide server compatibility

## When to avoid
- you need Exchange/ActiveSync or proprietary Google sync protocols
- you are not on Android (it is a mobile app, not a server or desktop tool)
- you need a library to embed CalDAV support in your own app (use dav4jvm instead)

## Facets
- artifact type: application
- maturity: stable
- function: backup, file-system, gui
- domain: developer-tools, privacy, self-hosted, mobile-development
- platform: -
- tags: caldav, carddav, webdav, contacts-sync, calendar-sync, tasks-sync, open-source, android

## Member repositories
- bitfireAT/davx5-ose (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:24.259131+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 2026-08-29T18:48:39.973779+00:00, confidence not recorded.
  - readme: https://github.com/bitfireAT/davx5-ose (fetched 2026-08-28T04:07:24.259131+00:00, sha 3b889529db6d)
  - homepage: https://www.davx5.com (fetched 2026-08-29T09:53:27.372452+00:00, sha 11edf01e1082)
  - site_page: https://www.davx5.com/faq/tasks/advanced-task-features (fetched 2026-08-29T09:53:27.380152+00:00, sha 3d48ef47d2e4)
  - site_page: https://www.davx5.com/about/logos (fetched 2026-08-29T09:53:27.381764+00:00, sha 6cfe03b05541)
  - site_page: https://www.davx5.com/about/legal-information (fetched 2026-08-29T09:53:27.383504+00:00, sha 58d8c654e7b6)
  - site_page: https://www.davx5.com/about/sitemap (fetched 2026-08-29T09:53:27.385204+00:00, sha 8d20867c24af)
  - site_page: https://www.davx5.com/organizations/pricing (fetched 2026-08-29T09:53:27.376579+00:00, sha b0b9c2d8ce52)
  - site_page: https://www.davx5.com/faq (fetched 2026-08-29T09:53:27.378445+00:00, sha 7f8fb9c681dc)
- Data as of 2026-08-30T08:39:29.467469+00:00.