勉強カレンダー、簡単登録！進捗が分かる、やる気継続

Task management and habit tracking app with calendar, timers, reminders, and progress tracking. Works offline without ads, with a one-time premium paid version.

Calendar organizer with support for events, tasks, and journals, synchronized with Google Calendar. However, reminders frequently fail, data is lost when switching devices, and synchronization issues occur.

TickTick is a full-featured task manager with synchronization, calendar, reminders, and habit tracker that works reliably across all platforms.

A task and reminder management app with calendar, widget support, and optional cloud synchronization (paid). The free version works well, but synchronization and backups require a premium subscription.

A simple digital daily planner with a week view that allows you to plan your day, take notes, and track tasks. It syncs with the cloud, supports recurring events and reminders, but frequently has issues with purchase restoration and synchronization.

Supershift is an app for planning and tracking shift schedules with support for multiple shift types, color coding, hour and salary calculations, working fully offline without registration.

Mobile app for managing work schedules with shifts, tracking working hours and calculating salary, but it frequently freezes during loading and requires internet to be disabled to function.

Habitify is a habit tracker with reminders, analytics, and cross-device synchronization, but with limitations in the free version and synchronization/stability issues on some devices.