Open Source Mobile Operating Systems Task Managers

Mindwtr: The Privacy-First GTD System Mindwtr is a Getting Things Done (GTD) productivity tool designed for "Mind Like Water." It runs completely offline—no accounts, no tracking, and no subscriptions. The Core GTD Workflow Capture: Instantly offload thoughts to your Inbox. Clarify: Process tasks rapidly with the built-in "2-Minute Rule" timer. Organize: Sort tasks by Contexts (@work, @home), Areas, and Projects. Reflect: Keep your system trustworthy with a guided Weekly Review. Engage: Filter Next Actions by energy level or time available. Powerful Features Local-First: Your data lives on your device (SQLite). You own it 100%. Flexible Sync: Sync privately via File System (Syncthing, iCloud) or WebDAV (Nextcloud). Focus View: A unified dashboard for your calendar events and next actions. Kanban Boards: Visualize projects with drag-and-drop columns. Stop managing your data. Start getting things done.

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Backlog Tracker is a free, open-source productivity application for managing unfinished work and activities that accumulate over time. It supports study assignments, work queues, games, habits, routines, and personalized task collections. Users can choose between count-based tracking for recurring workloads and one-time task tracking. Automatic growth schedules add pending items daily or on selected repeating days. These schedules can be paused when new work temporarily stops accumulating. The application estimates how long clearing a backlog will take based on a daily completion target. An accumulation predictor previews how the workload may change over time. Offline-first operation, JSON backups, and shareable templates make it practical for personal planning across Android, Windows, Linux, and macOS.

An Android client for the Todoist online task management service.

Flux is an Android productivity application that combines notes, tasks, journals, habits, and events in customizable workspaces. It allows users to create dedicated spaces for different projects, routines, and personal activities. Flexible templates help organize information according to individual workflows. Its Markdown editor supports formatted text, code blocks, tables, mathematical expressions, and Mermaid diagrams. Task management includes recurring activities, reminders, progress tracking, and completion statistics. Daily journals provide space for reflections and longer written entries. An integrated calendar organizes events and important dates, while habit analytics visualize progress over time. Media attachments enrich notes with images. Built with Kotlin and Jetpack Compose, Flux uses local storage, optional biometric protection, and Material 3 customization.

Vixitask is simple and lightweight tasks management app. This app is created to boost your productivity by manage all your tasks on your phone. This app is Open Source, if you want to improve this app you can create pull request to Vixitask repository on github.

WHPH is a cross-platform productivity application combining task management, habit tracking, time management, and note-taking. It helps users organize responsibilities while monitoring routines and daily activities. Its unified workspace reduces the need to switch between separate productivity tools. Application usage tracking provides additional insight into digital habits and potential distractions. Users can record quick notes alongside their scheduled work and personal goals. Devices can synchronize directly over a local network using end-to-end encryption without cloud accounts. An optional Model Context Protocol server exposes authorized actions to compatible local AI agents. This integration is disabled by default to preserve user control. Built with Flutter, WHPH supports Android, Windows, and Linux.

A free and open-source, fully customizable task manager for Android. Full-featured version on about June 2019. For contributing, see file TODO inside the repository root. TaskMan is licensed under GNU GPL version 3 or later; see LICENSE file inside the repository root. Android is a trademark of Google LLC in the United States and/or in other countries.