Open Source Mobile Operating Systems Note-Taking Apps
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Note-Taking Apps for Mobile Operating Systems
Browse free open source Note-Taking apps and projects for Mobile Operating Systems below. Use the toggles on the left to filter open source Note-Taking apps by OS, license, language, programming language, and project status.
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Obsidian
Community plugins list, theme list, and releases of Obsidian
The Obsidian Releases repository provides the official distribution builds and installers for Obsidian, the popular markdown-based knowledge management and personal wiki application. Obsidian itself is a powerful, offline-first note-taking tool that helps users build interconnected knowledge graphs using markdown files stored locally on their devices, with plugins and community themes for extensibility. This repository houses versioned compiled binaries and packages for multiple platforms such as Windows, macOS, and Linux, enabling users to download stable or nightly builds directly without needing to build the app from source. By maintaining clear version history and downloadable artifacts, it makes it easy for individuals and organizations to audit, rollback, or pin specific Obsidian releases for workflows that depend on stability or particular plugin compatibility. -
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Joplin
Open source note taking and to-do app with synchronization
Joplin is a free and open source note-taking and to-do application that can handle a large number of notes in Markdown format, organize them into notebooks and synchronize them with various cloud services. All notes can also be copied, tagged, searched and modified directly from the app or through your own text editor. Notes that are exported from Evernote can be imported into Joplin, be it formatted content, resources, complete metadata or plain Markdown files. When notes are synchronized with cloud services, notebooks, tags and other metadata can easily be moved, inspected or backed up as plain text files. Supported cloud services include Nextcloud, OneDrive, Dropbox and WebDAV. Joplin is available for Windows, Linux, macOS, iOS and Android, with three types: desktop, mobile and terminal. All of them have similar user interfaces and can be synchronized with each other. -
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MindZJ
An open-source, offline note-taking app with native AI & CLI
MindZJ is a knowledge management and idea organization tool designed to help users structure, connect, and visualize information in a meaningful way. It focuses on enabling users to create and manage interconnected notes, forming a network of ideas that can evolve over time. The system provides tools for organizing thoughts, tracking relationships between concepts, and building a personal knowledge base. It is particularly useful for research, learning, and creative workflows where capturing and linking ideas is essential. The platform emphasizes simplicity and clarity, offering a clean interface that minimizes distractions while supporting complex knowledge structures. It also supports extensibility, allowing users to adapt the system to their specific needs and workflows. Overall, mindzj serves as a flexible environment for building and navigating structured knowledge systems. -
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Omni-Notes
Free and powerful note-taking application
Omni-Notes is a powerful open-source note-taking application for Android designed to be both smart and simple. It has a clean and simple Material Design interface and is packed with plenty of smart features. These include image, audio and generic file attachment, a To-do list, Google Now integration, numerous widgets and so much more. Omni-Notes takes note-taking to a whole new level, making it more convenient and integrated. It's an ideal note-taking application particularly for old Android phones without such apps, giving users an updated look and experience when taking down notes. -
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FSNotes
Notes manager for macOS/iOS
FSNotes is a modern notes manager for macOS and iOS. App respects open formats like GitHub Flavored Markdown, so you can easily write documents on iPhone and MacBook. It's simple and blazing fast! Sync via iCloud Drive. 3D Touch and configurable keyboard. TextBundle and EncryptedTextBundle containers. Pinned notes are kept in sync with the desktop app. Dynamic fonts (iOS 11+). Night mode by location or screen brightness. Sharing extension. Encrypted note support. -
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Simplenote for Android
Simplenote for Android
Simplenote for Android is the open-source Android client for Simplenote, a lightweight, fast, and free note-taking app that syncs text notes, to-dos, and ideas across all devices automatically. The Android version provides a clean and minimalist interface optimized for phones and tablets where users can quickly jot down thoughts, organize them with searchable tags, and have everything backed up and synchronized via the Simplenote service. Users can also create checklists, pin important notes for quick access, and instantly find content using powerful keyword search tools. The app supports Markdown formatting, letting users add structured text like headers, lists, and links with easy previewing. Because it ties into the same Simplenote account used on iOS, macOS, web, or desktop apps, content stays consistent and accessible regardless of the platform you use. -
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GitJournal
Mobile first Note Taking integrated with Git
GitJournal is a note taking app focused on privacy and data portability. It stores all its notes in a standardized Markdown + YAML header format (optional). The notes are stored in a Git Repo of your choice - GitHub / Gitlab / Custom-provider. This means you can easily self host or host your notes in one of the many Git providers. GitJournal uses standard SSH, and can therefore work with any Git Hosting Provider. GitJournal aims to be extremely configurable and work with your favorite apps. The idea is to not build another silo and instead integrate it into your existing workflow. No two people are the same. Depending on the task and the person, your Notes may need to be visualized differently. All your notes are stored in Markdown. However you can edit the notes in many different ways depending on the task. Soon you'll even be able to visualize yours Notes in a Graph. GitJournal will always be completely Open Source. -
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Lifeograph
Advanced personal note taking application
Lifeograph is a diary program to take personal notes on life. It has all essential functionality expected in a diary program and strives to have a clean and streamlined user interface. -
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StoryPad - Timeline Diary
Your diary, notes, thoughts, stories, or novels on a simple timeline.
StoryPad lets you write and capture everything - notes, thoughts, emotions, workouts, travels, stories, novels, or poems - on a single continuous timeline. No folders. No tabs. Just your life, beautifully organized. Your story flows like life does: naturally. -
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Boostnote is an open source note-taking app for programmers. Apps available for Mac, Windows, Linux, Android and iOS. Built with Electron, React + Redux, Webpack and CSSModules.
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NoteSpark
NoteSpark is a fast, offline-first notes and ideas app
NoteSpark is a fast, offline-first notes and ideas app built with Expo, React Native, and TypeScript with markdown support out of the box Speed, simplicity, and privacy — no internet required, no accounts, no ads. Just pure note-taking joy. -
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Skedoff
Plan offline. Post when ready. No cloud, no account.
Skedoff is a privacy-first, offline-first social media content planner for creators who want to write drafts without handing their content to a server they don't control. No account required. No cloud sync. No auto-posting. No analytics. Everything lives on your device. The workflow is simple: Draft → Queue → Published. Write your captions, tag the platform, move them through the flow at your own pace. When you're ready, open your social app, paste, and publish. You stay in control. v1.0.1 ships Skedoff Workstation — a desktop companion that lets you edit your phone drafts from your PC over local Wi-Fi. No relay server. No internet required. Available on Android (Google Play), Linux (.deb, AppImage), and Windows (.exe). Built by FlagoDNA — a solo studio building privacy-first tools. -
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Ainee
Ainee - AI Notetaking and Learning Companion
Ainee is your ultimate AI-powered notetaking and learning companion. Capture lecture notes in real-time and effortlessly transform audio, text, files, and YouTube videos into formatted notes, mindmaps, quizzes, flashcards, podcasts, and more. Explore our AI meeting note taker, AI notes, video transcript generator, PDF to AI converter, and AI flashcard maker. Enhance your learning with our AI voice recorder, article summarizer AI, and AI quiz generator. Additionally, share your knowledge base with others to foster the flow of information and help new users benefit from collective insights. Experience smarter learning with Ainee today! How It Works - Effortless Knowledge Capture Across Formats - Enhance learning experience with AI-Driven Tools - Transform Study Materials into Dynamic Learning Formats - Share Insights and Knowledge Effortlessly -
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BoolHub
A fully functional personal information management software.
[Native application]: Developed with QT, pure native application, faster response; Cloud synchronization: Data is recorded in the cloud, and the data is no longer lost. Data synchronization is unlimited, everything is in your control; [Rich note types]: Support rich text, Markdown, code, tables, drawings, flowcharts and other note formats; [Manage your customers]: A customer relationship management system that supports team collaboration to grasp every lead and every customer; [Manage daily affairs]: Manage your affairs in an orderly manner through the feature-rich to-do list view; [Free without function limit]: There is no limit to the software functions, free to use, we are just to make a friend; [Different moods and different themes]: Notes and to-do lists, support a variety of exquisite themes, do whatever you want, change it if you want; [More application scenarios]: Memo view, timeline view, passwordbook view, statistics view to meet your different needs. -
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MultiCopyPaste
Store and organize your text data and copy/paste them with one click
Tired of copying and pasting the text over and over? Use this software to save all the text data and access it anytime with a click of a button. You can also organize your data in different tabs. All the data can be stored in JSON format and can be accessed again once you restart the software. Binaries for platform: Windows and Linux (Coz I have these two with me) -
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Nextcloud Notes for Android
Android client for Nextcloud Notes app
Nextcloud Notes Android is the official mobile client that enables users to create, edit, and manage notes stored on a Nextcloud server, making it possible to access personal notes securely from anywhere. Designed to integrate with Nextcloud’s server-side Notes app, this Android application supports multiple accounts, allowing users to operate against different servers or accounts within a single interface. It provides a full suite of note management tools including creation, editing, search, sharing, and deletion of notes, along with support for rendering markdown content so that formatted text and lists are displayed accurately. Additional conveniences like toggling checkboxes in view mode, marking favorites, bulk delete operations, and widgets for home screens make it a versatile companion for productivity on the go. The app also embraces modern UI features like dark mode and localized language support, enhancing usability across devices and regions. -
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Orgzly
Outliner for taking notes and managing to-do lists
An Android-based note-taking app focused on productivity and organization, using the Org mode format. -
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Simple Notes
A simple textfield for adding quick notes without ads
If you need to take a quick note to make a shopping list, a reminder for an address, or a startup idea, then look no further as this is the simple organizer tool you've been looking for Simple Notes. To-do list organizer and planner, the best note-taking apps, and sticky notes are free for Android mobile phones. No complicated setup steps are needed, just tap the screen and type in what you came for and create notes, quick lists, checklists, or backup for any idea. With your simple personal notebook, you can remember anything fast. A shopping list for groceries, a to-do list for your daily agenda, and easier note-taking to make setting up meetings a walk in the park. Simple notes planner is a quick, simple-to-use organizer and remarkable note-taking colorful widget and it will serve as an invaluable tool helping you to remember necessary pieces of information or shopping lists in the mall. -
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Simplenote for iOS
Simplenote for iPhone and iPad
Simplenote for iOS is the official iPhone and iPad client for the cross-platform Simplenote note-taking ecosystem, providing iOS users with a clean, responsive interface to create, edit, and manage plain-text notes. It syncs seamlessly with Simplenote’s cloud infrastructure so that notes created on a phone instantly appear on web, Android, macOS, or desktop apps without manual steps. On iOS, users can search quickly across all notes, organize content with tags, and use native iOS behaviors such as swipe gestures, system share sheets, and keyboard shortcuts for efficient workflow. With Markdown support, notes can include basic formatting and previewing, letting writers structure content easily without clutter. The repository includes setup guidance for building and running the app with proper credentials for the syncing service, showing that the codebase gives contributors a practical foundation for experimenting or extending capabilities. -
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Speedy Note
Note taking app for android.
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A note taking program that lets you take quick notes, organize notes by subject areas and priority, and export notes as web pages.
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