The Best Open Source Google Calendar AlternativesTop Calendar Apps like Google Calendar
The best open source alternative to Google Calendar is Etar. If that doesn't suit you, our users have ranked more than 100 alternatives to Google Calendar and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Google Calendar are Proton Calendar, Simple Calendar, Calendar Lock PEA and Lightning Calendar.
Google Calendar alternatives are mainly Calendar Apps but may also be Todo List Managers or Email Clients. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Google Calendar.- 43 Etar alternatives
- Free • Open Source
- Calendar App
- Android
- Android Tablet
- F-Droid
Material design open source calendar for Android.
- - Etar is the most popular Android Tablet alternative to Google Calendar.
- - Etar is the most popular Open Source alternative to Google Calendar.
Comments about Etar as a Alternative to Google Calendar
Nice, clean, and to the point calendar!
7Third OpinionImport and export function is listed but it didnt work for me at all. Worse, on my latest phone I could not even import an ICS file with all my stuff.
0Open source and works well !!
0 - Freemium • Open Source
- Calendar App
28 Proton Calendar alternatives- Online
- Android
- iPhone
- Android Tablet
- Tor
Your calendar is a record of your life. Proton Calendar helps keep it private.
Proton Calendar Features
Comments about Proton Calendar as a Alternative to Google Calendar
Deividas LosikovProtonCalendar may not be as feature-rich as Google Calendar, but their main focus is protecting user data with end-to-end encryption. The free plan is enough for basic calendar functionality, but paid subscriptions give extra benefits for supporting their business model, as that's their only source of income.
1newbreadProtonCalendar is still missing the search feature.
1- 98 Simple Calendar alternatives
- Freemium • Open Source
- Calendar App
- Android
- Android Tablet
- F-Droid
A simple calendar with optional CalDAV synchronization. You can easily create recurring events and setup reminders, it can also display week numbers.
Simple Calendar Features
Comments about Simple Calendar as a Alternative to Google Calendar
Open source, has widgets and is quite configurable
3Malkhaz NikolashviliI really prefer Google Calendar
-3 - 59 Calendar Lock PEA alternatives
- Free • Open Source
- Calendar App
- Mac
- Windows
- Linux
Calendar encryption: View calendars and stores them encrypted on your device or in the cloud.
Calendar Lock PEA Features
Opinions about Calendar Lock PEA as a Alternative to Google Calendar
- Free • Open Source
- Calendar App
- Task Management Tool
77 Lightning Calendar alternatives- Mac
- Windows
- Linux
- Thunderbird
- SeaMonkey
Organize your schedule and life’s important events in a calendar that’s fully integrated with your Thunderbird or Seamonkey email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.
Lightning Calendar Features
Opinions about Lightning Calendar as a Alternative to Google Calendar
- 24 Nextcloud Calendar alternatives
- Free • Open Source
- Calendar App
- Online
- Self-Hosted
The Calendar app is a user interface for Nextcloud's CalDAV server. Easily sync events from various devices with your Nextcloud and edit them online.
Nextcloud Calendar Features
Comments about Nextcloud Calendar as a Alternative to Google Calendar
Free (and open source) alternative. Your data is yours !
3 Personal Information Manager (Mail, Contact, Calendar and more).
Kontact Features
- 42 Kolab Community alternatives
- Freemium • Open Source
- Linux
- Online
- Self-Hosted
Kolab is entirely Free and Open Source Software (a.k.a. FOSS), and uses Open Standards. We’ll get to why this is important to us, and hope that it is important to you thereafter.
Kolab Community Features
Opinions about Kolab Community as a Alternative to Google Calendar
- Freemium • Open Source
- Cloud Storage Service
79 Woelkli alternatives- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
woelkli is a service that provides secure cloud storage hosted in Switzerland. Save, view, edit and share your files from anywhere in the world, from any device
Woelkli Features
Comments about Woelkli as a Alternative to Google Calendar
It's a cloud storage service...
4- 99 Kalendar alternatives
- Free • Open Source
- Calendar App
- Linux
Kalendar is a Kirigami-based calendar application that uses Akonadi. It lets you add, edit and delete events from local and remote accounts of your choice, while keeping changes syncronised across your Plasma desktop or phone.
Kalendar Features