# phw198/OutlookGoogleCalendarSync

Sync your Outlook and Google calendars

Repository: https://github.com/phw198/OutlookGoogleCalendarSync
Canonical: https://ross.abutalabs.com/products/outlookgooglecalendarsync
Homepage: https://www.outlookgooglecalendarsync.com/
Language: C#
License: MPL-2.0
License Family: copyleft
Topics: outlook, google, calendar, sync, synchronization, two-way, portable, oauth2, windows, synchronise, synchronize
Last push: 2026-08-25T16:23:35+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 34, longevity 100
- inputs: {"age_days": 3399, "days_push": 8, "days_rel": 227, "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 2122, forks 230 (observed 2026-08-28T04:06:16.581357+00:00)

## What it is
A free, open-source Windows application that synchronises calendars between Outlook (including Exchange/Outlook Online) and Google Calendar, with support for attendees, reminders, and two-way sync. It runs installed or portable, requires no purchase, and works behind web proxies.

## Use cases
- sync my outlook calendar with google calendar
- show my work meetings from exchange on my phone via google calendar
- two-way calendar synchronisation between outlook and google
- replace google calendar sync after google discontinued it
- sync corporate exchange calendar to google calendar for free
- keep meeting attendees and reminders when syncing calendars
- portable calendar sync tool that runs without installing

## When to choose
- you need Outlook/Exchange and Google Calendar kept in sync on Windows
- you want a free alternative to paid sync tools with no functionality restrictions
- you need a portable app that works behind corporate web proxies
- you rely on syncing attendees, reminders, and full event descriptions

## When to avoid
- you are not on Windows or don't use Outlook or Google Calendar
- you need server-side or headless sync without a desktop app
- you need calendar sync with providers other than Outlook or Google

## Facets
- artifact type: application
- maturity: active
- function: scheduling, workflow-automation, auth
- domain: developer-tools, self-hosted
- platform: windows
- tags: calendar-sync, outlook, google-calendar, two-way-sync, oauth2, portable, exchange, automation

## Member repositories
- phw198/OutlookGoogleCalendarSync (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:16.581357+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 2026-08-30T02:52:52.197020+00:00, confidence not recorded.
  - readme: https://github.com/phw198/OutlookGoogleCalendarSync (fetched 2026-08-28T04:06:16.581357+00:00, sha e45d64c05cd2)
  - homepage: https://www.outlookgooglecalendarsync.com/ (fetched 2026-08-29T10:32:51.060872+00:00, sha 7014d2336ae1)
  - site_page: https://www.outlookgooglecalendarsync.com/about (fetched 2026-08-29T10:32:51.069944+00:00, sha f90ab447f471)
  - site_page: https://www.outlookgooglecalendarsync.com/guide/install (fetched 2026-08-29T10:32:51.071483+00:00, sha 068f35c4b153)
- Data as of 2026-08-30T08:39:29.467469+00:00.