---
title: Sinkronisasi Kalender
icon: material/calendar
description: Calendars contain some of your most sensitive data; use products that implement encryption at rest.
cover: calendar.webp
---

<small>Protects against the following threat(s):</small>

- [:material-bug-outline: Serangan Pasif](basics/common-threats.md#security-and-privacy ""){.pg-orange}
- [:material-server-network: Penyedia Layanan](basics/common-threats.md#privacy-from-service-providers ""){.pg-teal}

**Calendars** contain some of your most sensitive data; use products that implement end-to-end encryption at rest to prevent a provider from reading them.

## Tuta

<div class="admonition recommendation" markdown>

![Tuta logo](assets/img/email/tuta.svg#only-light){ align=right }
![Tuta logo](assets/img/email/tuta-dark.svg#only-dark){ align=right }

**Tuta** offers a free and encrypted calendar across their supported platforms. Features include automatic E2EE of all data, sharing features, import/export functionality, multifactor authentication, and [more](https://tuta.com/calendar-app-comparison).

Multiple calendars and extended sharing functionality are limited to paid subscribers.

[:octicons-home-16: Homepage](https://tuta.com/calendar){ .md-button .md-button--primary }
[:octicons-eye-16:](https://tuta.com/privacy){ .card-link title="Privacy Policy" }
[:octicons-info-16:](https://tuta.com/support){ .card-link title="Documentation" }
[:octicons-code-16:](https://github.com/tutao/tutanota){ .card-link title="Source Code" }
[:octicons-heart-16:](https://tuta.com/community#donate){ .card-link title="Contribute" }

<details class="downloads" markdown>
<summary>Downloads</summary>

- [:simple-googleplay: Google Play](https://play.google.com/store/apps/details?id=de.tutao.calendar)
- [:simple-appstore: App Store](https://apps.apple.com/app/id6657977811)
- [:simple-github: GitHub](https://github.com/tutao/tutanota/releases?q=Calendar)
- [:fontawesome-brands-windows: Windows](https://tuta.com/blog/desktop-clients)
- [:simple-apple: macOS](https://tuta.com/blog/desktop-clients)
- [:simple-linux: Linux](https://tuta.com/blog/desktop-clients)
- [:simple-flathub: Flathub](https://flathub.org/apps/com.tutanota.Tutanota)
- [:octicons-browser-16: Web](https://app.tuta.com)

</details>

</div>

## Proton Calendar

<div class="admonition recommendation" markdown>

![Proton](assets/img/calendar/proton-calendar.svg){ align=right }

**Proton Calendar** is an encrypted calendar service available to Proton members via web or mobile clients. Features include automatic E2EE of all data, sharing features, import/export functionality, and [more](https://proton.me/support/proton-calendar-guide).

Those on the free tier have access to 3 calendars, whereas paid subscribers can create up to 25 calendars. Extended sharing functionality is also limited to paid subscribers.

[:octicons-home-16: Homepage](https://proton.me/calendar){ .md-button .md-button--primary }
[:octicons-eye-16:](https://proton.me/calendar/privacy-policy){ .card-link title="Privacy Policy" }
[:octicons-info-16:](https://proton.me/support/calendar){ .card-link title="Documentation" }
[:octicons-code-16:](https://github.com/ProtonMail/WebClients){ .card-link title="Source Code" }

<details class="downloads" markdown>
<summary>Downloads</summary>

- [:simple-googleplay: Google Play](https://play.google.com/store/apps/details?id=me.proton.android.calendar)
- [:simple-appstore: App Store](https://apps.apple.com/app/id1514709943)
- [:octicons-browser-16: Web](https://calendar.proton.me)

</details>

</div>

Unfortunately, as of August 2024 Proton has [still](https://discuss.privacyguides.net/t/proton-calendar-is-not-open-source-mobile/14656/8) not released the source code for their mobile Calendar app on Android or iOS, and only the former has been [audited](https://proton.me/blog/security-audit-all-proton-apps). Proton Calendar's web client is open source, however, and has been [audited](https://proton.me/community/open-source).

## Kriteria

**Harap diperhatikan bahwa kami tidak berafiliasi dengan proyek-proyek yang kami rekomendasikan.** Selain [kriteria standar kami](about/criteria.md), kami telah mengembangkan serangkaian persyaratan yang jelas untuk memungkinkan kami memberikan rekomendasi yang objektif. Kami sarankan Anda membiasakan diri dengan daftar ini sebelum memilih untuk menggunakan sebuah proyek, dan melakukan penelitian sendiri untuk memastikan bahwa itu adalah pilihan yang tepat untuk Anda.

### Minimum Qualifications

- Must sync and store information with E2EE to ensure data is not visible to the service provider.

### Kasus Terbaik

Kriteria kasus terbaik kami mewakili apa yang ingin kami lihat dari proyek yang sempurna dalam kategori ini. Rekomendasi kami mungkin tidak menyertakan salah satu atau semua fungsi ini, tetapi rekomendasi yang menyertakan fungsi ini mungkin memiliki peringkat yang lebih tinggi daripada yang lain di halaman ini.

- Should integrate with native OS calendar and contact management apps if applicable.
