Office

52 open source Office apps

920 Text Editor
APK
Note: this app is no longer updated, development seems to have stopped around 8/2017. 920 Text Editor is a Free, Open Source and no Ad software for Android. It supports multiple tabs, syntax highlighting for a lot of languages, showing line numbers, regular search, and much more.
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Bluetooth QR & Barcode to PC
APK
With this app you can turn your phone into a mobile QR/Barcode scanner and send the value of any code as text input to the connected Bluetooth device. Features: - Wide variety of QR/Barcode types supported - No special software on the receiving side required - Works completely offline - No Ads/In-App-Purchases - Different keyboard layouts to choose - Highly customizable for many use-cases The app works by utilizing the Bluetooth HID feature accessible on devices running Android 9 or later. Using this feature allows the Android device to act like a normal wireless keyboard connected via Bluetooth. That means it should work with every device that supports connecting a Bluetooth keyboard like a PC, Laptop or Phone.
F-DroidGitHubIzzyOnDroid
Calculator
APK
Calculator is a privacy-friendly calculator for complex functions, coming with a simple user interface and, by default, a dark theme. It has no ads or unnecessary permissions.
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Calculator - Hide Files
APK
Calculator Hide File App is an open-source Android application that combines a functional calculator interface with a secure private file storage feature. It allows users to store and manage personal files such as images, videos, documents, and notes, protected by a passcode.Key Features:Dual Functionality: A fully working calculator alongside a private file storage area accessible via passcode.Passcode Protection: Access your private files securely using a user-defined code.Secure File Manager: Add, remove, and organize files within a protected local environment.Local Storage: All files are stored on-device, ensuring user control and privacy.Lightweight & Fast: Designed to run smoothly across a wide range of Android devices.No Root Required: Works on standard Android devices without requiring root access.File Encryption: Protect stored data using encryption mechanisms.How It Works:Calculator Mode: Use the app as a standard calculator for everyday calculations.Access Private Storage: Enter your passcode to open the secure file storage area.Manage Files: Import, organize, and remove files within the app. Data remains protected locally on your device.Requirements:Android 6.0 or higherStorage permissions enabled“Manage All Files” permission may be required on Android 11+ for full file access functionalityTechnologies Used: Kotlin, XML, Android SDK, MediaStore API, and secure local storage techniquesOpen Source: This project is fully open-source, allowing users to inspect the code and verify how data is handled.Privacy Focus: The app operates entirely offline and does not collect or share user data.
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Cat Printer
APK
Cat-Printer supports some Bluetooth thermal printers of model GB01, GB02, GT01, GB03. It has cross-platform support (is also available for Linux, MacOS and Windows).The app might ask you for background location access, which you can safely deny. (Foreground) Location permission is required for scanning Bluetooth devices in newer Android system.
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CipherNotes
APK
Cipher is a privacy-first notes app with AES-256-GCM encryption. All data stays on your device. Zero cloud, zero telemetry.Features:Text notes & checklistsPer-note password encryptionOffline-onlyOpen source (MIT)
F-DroidGitHubIzzyOnDroid
C
CryptPad
Web
End-to-end encrypted collaborative office suite with documents, spreadsheets, and more.
Customer Database
APK
This simple customer database application is designed for small companies for easy and secure customer management on smartphones and tablets, separated from private contacts.It is possible to sync your data with a (self-hosted) MySQL server to prevent loss or defect of your mobile device. This also allows to sync the data with multiple devices.In addition to that, it has tools for the EU-GDPR and you can group customers, manage customers birthdays and vouchers, write newsletters, import customers from VCF files, export your data into VCF or CSV files and print a customer record (PDF export). Additionally, this app has a Dark Mode and the ability to save customer images.The app shows you the name of the customer for incoming calls if the phone number is stored in the customer database (caller identification / caller ID).Because of its high flexibility, the application is also often used in non-enterprise areas, such as teachers’ management of parent contact information.Additional features that can be unlocked via in-app purchase (Google Billing):Custom Fields: also drop down selection lists and sorting by these fields is supported."Input-Only-Mode": Optional activatable mode that allows only data entry. For example, the device can be handed to showroom visitors.Calendar: Manage customer appointments. Customers can insert the appointment directly into their calendar using a QR code.File Attachments: Attach up to 20 files to a customer.Design Options: Allows you to set your own title bar color and own startup logo.
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CuteCalc
APK
CuteCalc is a cute an elegant calculator app for Android!
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Deliveries: Track your parcels
APK
📦 Deliveries is an app that helps you keep track of all your parcels. Some of Deliveries's features: - 📱 Clean and simple interface: Focus solely on your parcels, not how to use the app. - 💬 Notifications: Get notified every time a parcel progresses further. - 🚫 No ads or other annoyances. - 👥 Free and open-source: https://github.com/itsvic-dev/parcel --- Supported services --- International: - 4PX - Cainiao - DHL - GLS - UPS North America: - UniUni United Kingdom: - DPD UK - Evri Europe: - Allegro One Box (PL) - An Post (IE) - Belpost (BY) - GLS Hungary - Hermes (DE) - InPost (PL) - Magyar Posta (HU) - Nova Post (UA) - Orlen Paczka (PL) - Packeta - Poczta Polska (PL) - Poste Italiane (IT) - PostNord - PostNL (NL) - Sameday Bulgaria - Sameday Hungary - Sameday Romania - Ukrposhta (UA) Asia: - eKart (IN) - SPX Thailand
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Docus - Simple Document Scanner
APK
Docus is an app that allows scanning and organizing documents – including tags, export in PDF and sharing with others. It works completely offline (does not even request networking permissions).
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Fossify Calculator Beta
APK
Introducing Fossify Calculator – your versatile and efficient tool for all your calculation needs. Enjoy a stylish, modern design paired with powerful functionality, perfect for both simple calculations and more complex tasks. 📶 OFFLINE FUNCTIONALITY: Fossify Calculator operates entirely offline without needing internet permissions. Use it anytime, anywhere, and experience enhanced privacy, security, and stability. 🌐 MULTIPLE FUNCTIONS: Whether you need to multiply, divide, or calculate roots and powers, Fossify Calculator has got you covered. It's designed for everyday calculations and more advanced operations, making it a reliable tool for a variety of mathematical needs. 📳 CUSTOMIZABLE SETTINGS: Tailor your experience with customizable settings. Toggle vibrations on button presses, prevent your phone from sleeping while using the app, and adjust the interface to your liking. 🔒 PRIVACY AND SECURITY: Your privacy is paramount. Fossify Calculator does not collect or share any user information with third parties. Use the app with peace of mind, knowing your data is secure. 📊 OPERATIONS HISTORY: Access a history of your calculations for quick reference. Easily browse through recent operations to review or continue your work. 🎨 PERSONALIZED EXPERIENCE: Personalize your calculator with customizable colors. Adjust text and background colors to match your style and preferences, creating a visually appealing and easy-to-use interface. 🌐 OPEN-SOURCE TRANSPARENCY: Fossify Calculator is fully open-source, offering transparency and security. Access the source code for audits, ensuring a trustworthy and reliable tool. Experience a new level of efficiency and customization with Fossify Calculator. Download now and elevate your calculation experience. Explore more Fossify apps: https://www.fossify.org Open-Source Code: https://www.github.com/FossifyOrg Join the community on Reddit: https://www.reddit.com/r/Fossify Connect on Telegram: https://t.me/Fossify
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Fossify Thank You
APK
If you cherish our commitment to delivering free, ad-free, and non-intrusive apps, consider showing your support for the Fossify mission. Your support is invaluable and greatly appreciated.🎁 UNLOCK EVERY FEATURE:By installing Fossify Thank You, you unlock every feature across our suite of apps. Enjoy the full potential of customization and prevent any "Donate please" dialogs.🎨 GLOBAL THEMES AND PREFERENCES:Take control of your experience with color customization. Fossify Thank You introduces Global themes, allowing color changes in one app to seamlessly update all other Fossify apps. It's a magical way to unify your app experience.🎨 MATERIAL DESIGN AND DARK THEME:Experience a visually stunning interface with material design and dark theme. Fossify Thank You provides a great user experience for effortless navigation.🌐 PRIVACY, SECURITY, AND STABILITY:With no internet access, Fossify Thank You prioritizes your privacy, security, and app stability. Enjoy an environment free from ads and unnecessary permissions. It's fully open source, ensuring transparency and customization.Your support makes a real difference. Thank you for being a part of the Fossify community! To ensure your support stays with us, please keep Fossify Thank You installed for at least a day to avoid automatic refunds.Explore more apps by Fossify: https://www.fossify.orgSource Code: https://www.github.com/FossifyOrgJoin the community on Reddit: https://www.reddit.com/r/FossifyConnect on Telegram: https://t.me/Fossify
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Hot Stuff
APK
Hot Stuff is an offline app designed to help you quickly and accurately document belongings for proof of loss forms in personal property insurance claims.With Hot Stuff you can:Create and store item informationTake and store related photosSearch through created records for specific itemsSee a summary of all created itemsExport stored data to spreadsheet software like Google Sheets or Microsoft ExcelRead educational resources, such as a glossary of common insurance terminology, walkthroughs of app functionalities, and opinion-based articlesCustomize the app to your preference of theme and currencyHot Stuff will never cost money, run ads, or collect data without your consent (all information is kept on your device and can be exported to CSV, meaning your data always stays in your control).Hot Stuff is open-source software maintained by a community of volunteers, built on the idea that protecting your future should be free, private, and available to all. The source code is viewable on GitHub, and contributions are always welcome!
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Karui ToDo
APK
An open source, privacy focussed, todo list app to quickly jot down things to do. Inspired by the system-24 theme and the Windows Mobile design system, this app's design is set to evolve into something even more eye-catching. Features - Simple note taking and list making: Includes an undo delete feature. - Retro terminalesque design: Inspired by Unix customizations found online. - Lightweight: Consumes only 0.05% CPU and 128KB of RAM. After all, simple apps shouldn't need more—remember, the Apollo mission operated on a computer with around 4KB of RAM! - Highly customizable: Offers many themes with option for custom fonts. - To add a new note tab: use the `///TabName` format. - To remove any tab (except the Main tab): use the `\\\TabName` format. - Or just long-press any tab to rename, delete or add new tab. For more details on features, usage, customizations, discussions, visit the github repo and telegram group.
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LibreOffice
Desktop
Full-featured open-source office suite with word processor, spreadsheet, and presentations.
Lock Screen Notes
APK
With this app you can easily create notes that stick around for later!Designed for you to be able to create and manage notes quickly without many interruptions. Notes are supposed to be small and not kept for very long as they are supposed to be used for reflections and 'keep for later' ideas, like grocery lists or anything that you need to be reminded of instantly.Optimized to be quick and efficient so that you can write down your ideas and notes in less that 2 seconds and only one tap of a button! Once created, a note will stick around and be instantly displayed on your lock screen as a notification.Notes and the ways they are displayed are highly customization. You can decide if they are grouped together and displayed as a single notification or separate. You can also set if they are always displayed prominently or more subtle. (depends on the type of device).Permissions explained:Run on startup: To display the notifications once you restart the deviceExternal storage: To read / write backups
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Lumolight: Screen & Flashlight
APK
Lumolight is an open-source flashlight app that can perform both front and back flash. The app is designed based on the "Material You" design system and it looks stunning. The app supports both light and dark themes and supports dynamic theming. It uses the screen as a front flash by brightening up and showing some static colors that the user chooses and it uses the flashlight for the torch mode. It has "Tile support" where you can use the front flash without even opening the app, and also adjust the brightness using the volume keys The customization option is one of the strong parts of this app. For the front flash, you can choose: Colors: Which color do you want to light up Duration: For how long it will be active. Brightness: The level of brightness you want. For the back flash: Duration: For how long it will be active. BPM (Blink per minute): You can blink your flashlight and also adjust its value. Flash-strength: You can also adjust the flashlight's strength. (Supported devices only) We are constantly improving our app by adding exciting features and fixing any issues that arise. With this app, you can be sure it will bring a good user experience.
F-DroidGitHubIzzyOnDroid
Mindwtr
APK
Mindwtr is a complete Getting Things Done (GTD) productivity system designed for "Mind Like Water."Built for speed and privacy, it gives you a powerful, distraction-free way to capture and organize your life without cloud subscriptions.DESIGNED FOR FOCUSMindwtr is simple by default and powerful when you need it.Whether you are capturing a quick thought on the go or planning a complex project, the interface gets out of your way.CORE GTD WORKFLOWCapture: Instantly add tasks to your Inbox the moment you think of them.Clarify: Process your inbox quickly with the 2-minute rule.Organize: Sort tasks into Projects, Contexts (@work, @home), and Areas.Reflect: Stay on top of your goals with the built-in Weekly Review.Engage: Filter Next Actions by context or energy level to know exactly what to do next.POWERFUL FEATURESFocus View: A unified dashboard combining your Agenda and Next Actions.Kanban Boards: Visualize your projects with drag-and-drop boards.Local-First: Your data lives on your device. No login required, no tracking.Markdown Support: Add rich notes and descriptions to your tasks.Flexible Sync: Seamlessly sync with your desktop via File Sync (iCloud Drive, Syncthing) or WebDAV (Nextcloud).PRIVACY FOCUSEDWe believe your tasks are your private business. Mindwtr works completely offline and does not track your data or require an account.
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Mindwtr - GTD Task Manager
APK
Mindwtr (pronounced "mind water") is a free, open-source task manager and to-do list built for Getting Things Done (GTD). It is local-first and privacy-first by default. No account required. No cloud dependency. Your data stays on your device unless you choose to sync, export, or back it up. Use Mindwtr as an offline task list for your whole life: capture inbox items, clarify next actions, organize projects, and review what matters without giving a company your personal task data. KEY FEATURES: - GTD task manager: Inbox, Next, Waiting, Someday, Projects, Areas, and Contexts map directly to the Getting Things Done workflow. - To-do list and offline task list: Works without an internet connection, with fast local storage on your device. - Kanban board: Visualize work with board view and drag-and-drop task flow. - Projects and Areas: Keep complex goals organized without turning every task into a calendar event. - Review workflow: Daily and weekly review tools help you keep commitments current. - Optional sync and backup: You decide if and where data syncs. - Open source: Transparent code, no account lock-in, and no subscription required. PRIVACY BY DESIGN: - No account required. - No cloud dependency. - Your data stays on your device. - Mindwtr does not sell your task data. Whether you are a GTD veteran, building a private to-do list, or looking for an offline task manager with kanban board support, Mindwtr helps you reach mind like water.
F-DroidGitHubIzzyOnDroid
NerdCalci
APK
NerdCalci is a powerful calculator designed for nerds and power users who need more than basic arithmetic. Features: - Offline - Works without internet - Variable support - Define variables and reuse them in calculations - Percentage calculations - Natural syntax like "20% of 50000" or "15% off 1000" - Unit conversions - Natural syntax like "10 m in feet" or "100 kmph to mph" - Calendar-aware date and time engine with timezone support - Custom functions - Define your own functions with multi-statement support and scope isolation - Dynamic variables - Quickly compute block sums (`total`) and averages (`avg`) - Syntax highlighting - Color-coded numbers, variables, operators, and comments - Smart error diagnostics - See human-friendly explanation of math or syntax errors - Auto-completion - Smart suggestions for variable names - Comments - Document your calculations with # comments - Multiple files - Organize calculations in separate files with auto-save - Tags - Organize files with custom tags - Pin files - Keep frequently used files at the top - Search - Search your files easily by name or tag - Duplicate files - Create a copy of a file with a new name - Undo/Redo - Up to 30 steps per file - Backups - Automatically or manually backup your files to app storage or a custom folder - Restore from backups - Restore your files from backups - Copy with results - Copy calculations with their results - Export - Share your calculations as a PNG image or a multi-page PDF - Dark/light theme - System, dark, or light mode support - Line numbers - Easy reference and navigation Perfect for: - Quick calculations with reusable values - Budget planning and financial calculations - Unit conversions and formulas - Educational purposes and learning - Any scenario where you need to document and reuse calculation values NerdCalci combines the simplicity of a calculator with the power of a text editor. As a capable alternative to text-based calculators like Numi, Calca, and Soulver, it is ideal for developers, students, accountants, and anyone who frequently works with numbers.
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ONLYOFFICE
DesktopWeb
Open-source office suite with collaborative editing and MS Office compatibility.
OSS Card Wallet
APK
OSS Card Wallet is a free and Open Source app to transform your mobile device into a powerful card scanner and walletSCAN * Scan your IDs, business cards, loyalty cards with a fast camera scan. * Enjoy the automatic edge detection feature allowing you to quickly scan many documents * Bulk scan to quickly add recto/verso * Import cards from images or even existing PDFBARCODE * automatic detection of barcodes, qrcodes... * manually create a card with a barcode * add as many barcodes as you want to a simple cardPASSBOOK * Full Passbook support * import from .pkpass * view your Passbooks as you would in the official Apple Passbook App * Export and share your passbooks as .pkpass or PDFENHANCE * Improve PDFs quality by applying enhancing filters for color or black & white cards. * Edit crop * Reorder pages, merge cards * Rotate pages * Change brightness and contrast to create beautiful cardsORGANIZE * Create folders with colors for easy access * Sort cards * Name cardsEXPORT * create PDF directly from your mobile device by converting photos, images, other documents, into beautiful and configurable PDFs. * export and share your cards to PDF or JPEG or PNG with your friends, family, colleaguesSEARCH * OCR your cards using offline (to be downloaded first) and open source models in many languages. * Generate searchable PDFs by converting images to text using the powerful OCR models from the Tesseract project.SECURITY * Improve the security of your generated PDF by adding a password.SYNC * Synchronize your cards, PDFs, Images with your computers, other devices or local folder sync. * Sync using WebDAV, Google Drive, OneDrivePRIVACY * Use a free and Open Source card wallet to protect your privacyCOMMUNITY * Provide feedback or even help translate the app. You are part of this project and you make help it grow so that everyone can enjoy the best free and open source card wallet
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OSS Document Scanner
APK
The OSS Document Scanner is a free and Open Source app to transform your mobile device into a powerful document scanner. SCAN * Scan your documents or receipts with a fast camera scan. * Enjoy the automatic edge detection feature allowing you to quickly scan many documents * Bulk scan documents or book pages * Import documents from images or even existing PDF * You can scan to PDF any kind of document: Receipts, IDs, notes, recipes, photos, business cards, whiteboards, books. You can then use and work with the generated PDFs on all your devices, phones, computers, tablets... ENHANCE * Improve PDFs quality by applying enhancing filters for color or black & white documents. * Edit crop * Reorder pages, merge documents * Rotate pages * Change brightness and contrast to create beautiful documents ORGANIZE * Create folders with colors for easy access * Sort documents * Name documents EXPORT * create PDF directly from your mobile device by converting photos, images, other documents, into beautiful and configurable PDFs. * export and share your documents to PDF or JPEG or PNG with your friends, family, colleagues SEARCH * OCR your documents using offline (to be downloaded first) and open source models in many languages. * Generate searchable PDFs by converting images to text using the powerful OCR models from the Tesseract project. SECURITY * Improve the security of your generated PDF by adding a password. SYNC * Synchronize your documents, PDFs, Images with your computers, other devices or local folder sync. * Sync using WebDAV, Google Drive, OneDrive PRIVACY * Use a free and Open Source document scanner to protect your privacy COMMUNITY * Provide feedback or even help translate the app. You are part of this project and you make help it grow so that everyone can enjoy the best free and open source document scanner
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