Proton Calendar vs TimeFinder

Proton Calendar is a calendar service for managing events, invitations, and recurring schedules on Android and iOS. Event titles, descriptions, locations, and invited people are protected with end-to-end or zero-knowledge encryption. A free Proton account costs nothing and allows up to 3 calendars. Paid Proton Mail plans allow up to 25 calendars, with calendar sharing by link to other calendar services on the web. Users can send invitations and add events from Proton Mail; appointment scheduling updates availability and adds confirmed meetings. The service supports scheduling links and video meetings, and notifications can arrive through desktop browsers or mobile devices. Calendar import and export are available on paid plans. Subscriptions purchased through proton.me renew automatically, and users can switch plans at any time; upgrades receive prorated credit. Proton is incorporated and headquartered in Switzerland and follows Swiss privacy laws.

TimeFinder is a personal productivity app for time blocking and daily planning. Users drag tasks from lists into time slots in a split view to build a schedule, then can coordinate it with calendar sync. Task labels retain chosen colors, templates save routines for reuse, and rollover moves unfinished tasks into available time slots. Focus sessions are also included. Optional integrations include Google Tasks, Todoist, TickTick, Zapier, and device calendars. An optional AI Assistant can help with scheduling, task organization, and productivity questions; it sends data to an AI provider only after a user enables it and submits a request. TimeFinder is available on web, Windows, macOS, iOS, and Android. The free plan provides core features, and the US App Store lists a Premium Lifetime purchase at $119.99 as a one-time purchase. The US App Store also offers a 7-day trial, with conditions shown before it starts. The maker says users can export data from within the app at any time.