Fossify Calendar

A plain Android calendar with no ads, no tracking and no internet permission.

Instead of Google Calendar app

www.fossify.org/apps/calendar

Screenshot from www.fossify.org/apps/calendar, taken 2026-10-30, shown to help you recognise the tool. It belongs to its maker. Ask us to remove it.

Fossify Calendar does not ask Android for the internet permission, so it could not phone home if it wanted to. It has day, week, month, year and event-list views, recurring events, reminders, holidays, widgets and calendar import and export, and the project says it has no ads or tracking. The code is GPL-3.0 and the app is on F-Droid and Google Play.

Fossify Calendar scores a 5 on footprint and self-direction, a 4 on lock-in and power and a 3 on longevity and delivery.

Fossify does not run a sync service, so calendar data syncs through accounts or providers already set up on the device, and for a calendar of your own you would pair it with DAVx5 and a server. The repository page says it syncs with Google Calendar, Outlook, Nextcloud, Exchange and more, while the website says it runs no sync service, so check how syncing works for your setup. The page names no developers and gives no funding detail beyond a Fund link.

What stands out

• A calendar app with no ads, no tracking and no internet permission
• Syncs through accounts already on the phone, with no sync service of its own
• GPL-3.0 and Android only

For comparison, we also reviewed Google Calendar (16/30) as a benchmark.