Google Calendarのレビュー、価格、機能、メリット・デメリット

Proton Calendar

Calendar3.2/5

Proton Calendar is designed to keep your personal scheduling private and secure. It offers the full functionality you expect from a modern digital calendar combined with robust protections. Proton is incorporated and based in Switzerland. This means strict Swiss privacy laws protect all user data, backed by Swiss neutrality. 💡 Proton offers an easy-to-use alternative to Big Tech services, ensuring your data is protected, not exploited.

Cozi

Calendar2.5/5

Cozi is designed specifically as a trusted digital tool for busy families. It solves the headache of coordinating multiple schedules and maintaining household organization. Shared households and parents use it to centralize calendars, appointments, and general logistics. The app pulls together everything you manage—from school events to dentist visits—into a single hub. ✅ You can access your unified family plan conveniently on any mobile device or computer. It has even been named a **must-have app** by the TODAY show.

Shiftie

Employee Scheduling4.2/5

Staff scheduling made simple. Shiftie is a smart staff scheduling tool that simplifies rota planning, tracks availability, and improves team communication, saving time and ensuring you're always staffed when it counts.