privacyguides.org/i18n/zh/calendar.md

---
title: "VPN供应商"
icon: material/calendar
description: Calendars contain some of your most sensitive data; use products that implement encryption at rest.
---

日历包含一些最敏感的数据;使用静态实现E2EE的产品，以防止提供商读取它们。

## Tutanota

!!! recommendation

    ![Tutanota标志](assets/img/calendar/tutanota.svg#only-light){ align=right }
    ![Tutanota标志](assets/img/calendar/tutanota-dark.svg#only-dark){ align=right }
    
    **Tutanota**在其支持的平台上提供免费和加密的日历。 功能包括：所有数据的自动E2EE，共享功能，导入/导出功能，多因素认证，以及 [more]（https://tutanota.com/calendar-app-comparison/）。
    
    多个日历和扩展的共享功能仅限于付费用户。
    
    [:octicons-home-16: 主页](https://grapheneos.org/){ .md-button .md-button--primary }
    [:octicons-eye-16:](https://tutanota.com/faq#privacy-policy){ .card-link title="隐私政策" }
    [:octicons-info-16:](https://grapheneos.org/faq){ .card-link title=文档}
    [:octicons-code-16:](https://github.com/tutao/tutanota){ .card-link title="源代码" }
    [:octicons-heart-16:](https://tutanota.com/community){ .card-link title="贡献" } 下载
    
        - [:simple-googleplay: Google Play](https://play.google.com/store/apps/details?id=de.tutao.tutanota)
        - [:simple-appstore: App Store](https://apps.apple.com/us/app/tutanota/id922429609)
        - [:simple-windows11: Windows](https://tutanota.com/blog/posts/desktop-clients/)
        - [:simple-apple: macOS](https://tutanota.com/blog/posts/desktop-clients/)
        - [:simple-linux: Linux](https://tutanota.com/blog/posts/desktop-clients/)
        - [:simple-flathub: Flathub](https://flathub.org/apps/details/com.tutanota.Tutanota)
        - [:octicons-browser-16: Web](https://mail.tutanota.com/)

## Proton Calendar（Proton 日历）

!!! recommendation

    ！[Proton](aassets/img/calendar/proton-calendar.svg)}=right }
    
    **Proton Calendar** 是一个通过网络或移动客户提供给Proton成员的加密日历服务。 功能包括：所有数据的自动E2EE，共享功能，导入/导出功能，多因素认证，以及 [more]（https://proton.me/support/proton-calendar-guide/）。 免费级别上的人可以使用单个日历，而付费用户可以创建多达20个日历。 扩展的分享功能也仅限于付费用户。
    
    [:octicons-home-16: 主页](https://grapheneos.org/){ .md-button .md-button--primary }
    
    [:octicons-eye-16:](https://proton.me/support/proton-calendar-guide#privacy-policy){ .card-link title="隐私政策" }
    [:octicons-info-16:](https://grapheneos.org/faq){ .card-link title=文档}
    [:octicons-code-16:](https://github.com/ProtonMail/WebClients){ .card-link title="源代码" }
    [](){ .card-link title="贡献" } 下载
    
        - [:simple-googleplay: Google Play](https://play.google.com/store/apps/details?id=me.proton.android.calendar)
        - [:octicons-browser-16: Web](https://calendar.proton.me)

## Criteria

**Please note we are not affiliated with any of the projects we recommend.** In addition to [our standard criteria](about/criteria.md), we have developed a clear set of requirements to allow us to provide objective recommendations. We suggest you familiarize yourself with this list before choosing to use a project, and conduct your own research to ensure it's the right choice for you.

!!! example "This section is new"

    We are working on establishing defined criteria for every section of our site, and this may be subject to change. If you have any questions about our criteria, please [ask on our forum](https://discuss.privacyguides.net/latest) and don't assume we didn't consider something when making our recommendations if it is not listed here. There are many factors considered and discussed when we recommend a project, and documenting every single one is a work-in-progress.

### Minimum Qualifications

- 必须与E2EE同步并存储信息，以确保数据对服务提供者不可见。

### Best-Case

Our best-case criteria represents what we would like to see from the perfect project in this category. Our recommendations may not include any or all of this functionality, but those which do may rank higher than others on this page.

- 如果适用的话，应该与本地操作系统的日历和联系人管理应用程序集成。