Календарь ++

A simple app for creating text notes with encryption, images, and task support. Completely free without ads, but has compatibility issues with newer Android versions.

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.

Hizo is a habit and daily task tracking app with a clean design and marking mechanics, available on a free tier and premium subscription, but suffers from device synchronization issues, login errors, and server instability.

Google Tasks is a minimalist task manager with cloud synchronization, subtasks, deadlines and reminders, integrated with Gmail and Google Calendar, but with reliability issues in notifications and several missing features.

Habit tracking app with calendar, timers, and reminders, but with localization issues and a non-intuitive interface.

Free mobile app for managing to-do lists with reminders, calendar, widgets, and Google Drive synchronization.

Todoist is a task management app with calendar support, voice input (Ramble), various views (list, board, calendar), cross-device synchronization, and collaboration features; partially implemented with issues in voice input for Russian language and some devices.

Calendar app for tracking work shifts with income tracking, notifications, and notes. Shift planning, earnings statistics, and basic widgets work effectively, but there are limitations on shift quantity and widget synchronization issues.