OneCalendar

Android · iPhone

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Freedom report

One barScore 7.2

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely2 of 6 device platforms
DocumentedThinly documented

OneCalendar is ranked #46 of 197 in calendar apps on Freedom251, made by OneCalendar (Heemskerk, Netherlands). It runs on Android, iOS. There is a free plan.

OneCalendar plans and pricing

All plans

Basic Free Calendar viewing and management · Multiple calendar providers · Multiple calendar views · Appointment sharing onecalendar.nl · 21 Sept 2026

Premium Not published Up to 3 years of historic appointments onecalendar.nl · 21 Sept 2026

Compared on calendar apps

Free plan: Yes
Mobile apps: ios and android

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