Productivity
1843 open source Productivity apps
CBTAndroid
APK
A simple implementation of a seven column thought journal. What is CBT: CBT is a form of therapy that helps you restructure negative thoughts in order to improve your life How to use: When you find yourself feeling down, record the thoughts you are currently having. Then prove that those thoughts are wrong with facts. Finally come up with a new way of looking at the situation. Learn More
F-Droid
CClauncher
APK
CCLauncher is a minimalist Android launcher designed to help reduce screen time and distractions due to all the apps present (like social media apps for example). Unlike traditional launchers, apps are hidden by default. Key Features: - Apps invisible by default (type to search) - Digital wellbeing tools (screen time tracking) - Double-tap to lock screen - Customizable gestures (swipe left/right/up/down shortcuts) - App renaming/hiding capabilities - Plain black/white wallpapers for focus - No ads, no tracking, no internet permission - 100% private Usage Tips: 1. Swipe up to search apps 2. Long press empty space for settings 3. Enable double-tap lock in Accessibility settings 4. Rename duplicate-named apps for easier launching This is a modern rewrite of Clauncher using Kotlin and Jetpack Compose, maintaining most of the minimalism while improving functionality (and maybe performance...)
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CEToolbox
APK
The CEToolbox project aims to provide a convenient tool for computing Capillary Electrophoresis parameters.
F-DroidGitHub
CIDR Calculator
APK
CIDR (Classless Inter-Domain Routing) Calculator is a simple IP subnet calculator for network engineers to quickly determine what the address range is of a subnet.
F-DroidGitHub
CIFS Documents Provider
APK
CIFS Documents Provider is an Android app to provide access to shared online storage. [Features] * Provide other apps with access to shared network storage via the Storage Access Framework (SAF). * Provides access to files and directories. * Supports SMB (Samba, Common Internet File System (CIFS), Windows Network Shared Folder), FTP, FTPS and SFTP. * Share and transfer files on online storage. * Multiple connection settings can be stored. * Supports connection settings export/import. * Supports dark mode. * Can be treated as local storage (configuration required) * Notifications can be displayed to prevent task kills. (configuration required) [Objective] * Import and export of files created by the app. * Manage files and directories with the Storage Manager app. * Play music, videos, etc. with the media player app. * Direct saving of photos taken with the camera app. [Note] * No file management function in this app. * To use this app, your apps must support SAF (Storage Access Framework). * Apps that assume local storage may not work properly. * Apps may crash when specified as a storage destination for streaming audio or video data. [How to use] See the following page. (Japanese) https://github.com/wa2c/cifs-documents-provider/wiki/Manual-ja [Sources] GitHub https://github.com/wa2c/cifs-documents-provider [Issues] GitHub Issue https://github.com/wa2c/cifs-documents-provider/issues Please post here if you have bug reports, Future requests, or other information.
F-DroidGitHub
CKPool Watcher
APK
Allows users of the kano.is Bitcoin minning server to check the status of their miners. It uses the kano.is API and JSON. PLEASE NOTE, this app is in early alpha and still has bugs. Features: * Grabs JSON from kano.is * Shows pool and miner hashes/5m and hashes/hour
F-Droid
CMIS Browser
APK
Access content from repositories that support the CMIS protocol, like Alfresco or Nuxeo. CMIS = Content Management Interoperability Services. * browsing the CMIS repository * viewing and sharing documents * title or fulltext search * Favorites * Multiple Repositories
F-Droid
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CPU Info
APK
CPU Info provide main information about hardware and software of your device: * CPU specification (with current frequency on specyfic cores) * GPU specification * RAM and storage state (internal, external and SD card) * Display metrics * Android OS details * Sensors data * Battery status * WiFi and Bluetooth mac address (on older Androids) * Audio card info * Native libraries used in another applications * CPU and battery temperature monitor
F-DroidGitHub
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CPU Stats
APK
Simple tool that displays usage details of the CPU within the statusbar. Features: * 6 & 8 Core CPU Support!! (2 notification icons) * Single Core, Dual Core (NVIDIA Tegra 2), & Quad Core (NVIDIA Tegra 3) support!! * Statusbar notification for CPU Usage * Statusbar notification for CPU Frequency
F-DroidGitHub
CTU Menza
APK
This Android app shows dish menus for CTU cafeterias from agata.suz.cvut.cz web in much more pleasant and usable way for phones. It shows today and week menu, opening hours, contacts, announcements and address for all the canteens. It supports dark mode and Material You including Android 12 dynamic theming.
F-DroidGitHub
Cache Cleaner
APK
Since the release of Android 6 (Marshmallow), the option to clear the cache of all apps at once has been restricted by Google to system apps only. This means that users no longer have the convenience of clearing the cache of all their apps simultaneously. To clear the cache of individual apps, one must manually navigate to each app's "App Info" screen, locate the "Storage" menu, and then select the "Clean cache" button. To simplify this process and save time, Cache Cleaner requests a list of installed apps on your device and utilizes the Accessibility service to replace the manual steps involved in clearing the cache. This allows for a more convenient and automated process of cache cleaning. Cache Cleaner provides the added benefit of customizable app lists. This functionality allows you to create personalized lists of specific apps, giving you the flexibility to selectively clear the cache of only the apps you choose.
F-DroidGitHub
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Cache Cleaner Widget
APK
A lightweight Android widget to clean all app cache directories with a single tap. Runs silently using root access. No activity or user interface. Executes a native C binary and shows a toast on success. Ideal for minimal, root-enabled setups.
F-Droid
Caff
APK
Caff provides a quick settings tile that allows the display to be kept on for an extended period of time. By tapping the tile, it is possible to toggle caffeine mode and cycle between different preset durations. The tile also serves as a countdown timer when caffeine is enabled. By long-pressing it, a preferences menu is shown, allowing the user to choose which durations will be cycled through. Additionally, there is an "infinite" mode, which will keep the display on indefinitely. Note You may have to disable battery optimizations for the app to work.
F-DroidGitHub
Caffeinate
APK
Caffeinate is an App that helps android developers to keep their phone's display awake without having to change the device settings. It can be toggled at various places:a tile in the quick settings, the place that holds the toggles for e.g. Wi-Fi and Bluetooth. Requires Android 7 or higher. a button in the app itself Features Uses android's WakeLock Class with either SCREEN_DIM_WAKE_LOCK or SCREEN_BRIGHT_WAKE_LOCK lock level based on user settings Timeout period is configurable Switch timeouts from the quick settings tile or the button in the app. clicking them, selects the next timeout and after 1 second the timeout will start, if the quick settings tile or the button are clicked after starting, the timeout will stop. Available timeouts are [30 seconds, 05 minutes, 10 minutes, 15 minutes, 30 minutes, 60 minutes, Ꝏ] An option to enable the screen to dim while the WakeLock is acquired An option to enable holding the WakeLock if the screen is locked, so that the screen will keep on after unlocking, default behaviour is that the WakeLock is released when the screen is locked Multiple theming options [light, dark, system default and material you]
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Caffeine
APK
Note: author declared end-of-life for this app, so future updates are unlikely. Caffeine is an app that keeps your phone awake for a certain time. Time options are 1, 5, 10, 30, and 60 minutes. There is also an infinite time option.
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CalEF (Calendar Entry Formatter)
APK
Making an appointment means Add date, time and title of the appointment to the Android-Calendar In Android-Calendar-Detailview use Send/Share (from menu or toolbar) Select "CalEF" as share destination (to convert to human readable text) Select the final Send/Share destination (clipboard, sms, mail, ...) Usually calendar entries are shared in a human-unreadable technical format "ICS" (or "VCS") that calendar programs can read. CalEF receives the technical format and re-sends/re-shares it-s content as human readable text. Date/Time is formatted according to current language/locale. CalEF can also process "ics" (or "vcs") files (i.e. from a calendar backup). Requirements: Android-4.4 (api 19) or later. Permissions : None Compatible with Etar-Calendar version 1.0.29 or later (January 2022) Simple-Calendar version 4.0.0 or later (May 2018) Buildin Android-Calender (Tested with android-10 on LG device) Backup Calendar Import-Export version 2.4 or later (November 2016)
F-DroidGitHub
CalcYou
APK
CalcYou is a privacy focused calculator app that is not just a calculator. Solve everyday problems with the intuitive basic calculator, or delve into advanced functions with the powerful scientific calculator. Feeling lost in a sea of units? CalcYou's versatile unit converter can convert lengths, weights, volumes, and more. Need to express complex equations? Access a vast library of symbols, including Greek letters, arrows, superscript, and subscript, all with a few taps. You want to quickly draw a mathematical function to understand its shape? No worries, CalcYou can plot it for you.
F-DroidGitHub
Calculator
APK
Calculator Hide File App is a smart Android app that looks and works like a regular calculator but secretly functions as a secure file vault. Keep your private images, videos, documents, and other files safe with a hidden passcode while enjoying a fully functional calculator interface.Key Features:Dual Functionality: A real calculator that doubles as a hidden file vault.Secret Passcode: Unlock your hidden files with a private code only you know.Secure File Manager: Hide, unhide, and organize your files easily and safely.Fast & Lightweight: Smooth performance on all Android devices.No Root Required: Fully functional without rooting your device.File Encryption: Protect your hidden files with strong encryption.Why Choose Calculator Hide File App?Completely secure and discreet – no one will suspect your files are hidden.Works like a normal calculator while keeping your private files safe.Supports images, videos, documents, and other file types.Open-source and transparent – you can inspect the code yourself to ensure your privacy.How It Works:Use as a Regular Calculator: Perform standard arithmetic operations without revealing the hidden vault.Enter Secret Passcode: Type your code and press "=" to access your hidden files.Manage Hidden Files: Add, remove, and organize files safely. Files remain protected even after closing the app.Requirements:Android 6.0 or higherStorage permissions enabled“Manage All Files” permission for Android 11+ devicesTechnologies Used: Kotlin, XML, Secure internal storage & MediaStore APIWhy You’ll Love It: Keep your files completely hidden, enjoy a real calculator interface, and benefit from an open-source, lightweight, and secure app. Protect your privacy with ease!
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Calculator Notification
APK
How many times did you want to use calculator without suspending the app that you are currently using? Now it's possible with Calculator application in the notification area. The app is very minimalistic, but it includes all the essential functionality, including copying and pasting data. Design was inspired by the official Android calendar application. On Android Nougat and later you can add settings tile for the Calculator, so you do not need to leave any app to launch the Calculator.
F-DroidGitHub
Calculator You: Math & Units
APK
Discover the ultimate calculator experience with our beautifully designed app, featuring 60+ stunning color themes to match your style. Whether you're tackling complex scientific equations or simple everyday calculations, our powerful and user-friendly interface makes it all easy. Key Features: 🎨 Beautiful Design & 60+ Color Themes: Personalize your calculator with a choice of 60+ vibrant color themes, making every calculation visually enjoyable. 🔬 Scientific Mode: Access advanced mathematical functions with our comprehensive scientific calculator, perfect for students, engineers, and math enthusiasts. 🕒 History: Easily track and review previous calculations with our handy history feature, ensuring you never lose important work. 📏 Unit Converter: Convert units effortlessly with our built-in converter, supporting a wide range of measurements, including length, weight, and more. 👌 User-Friendly Interface: Enjoy a clean, intuitive interface designed for effortless navigation and efficient calculations. Whether you're a student, professional, or anyone in between, our calculator is your go-to tool for all your math and conversion needs. Download now and elevate your calculation experience! Made not with love❤️, but by love❤️.
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Calculator-inator
APK
Calculator-inator is a Calculator & Converter for Android inspired from Google's Calculator App. The app features: Basic & Advanced Calculator with logarithmic and trigonometric functions. Length, Area, Mass, Speed, Pressure, Data, Volume, Time, Temperature, Angle Live Currency Converter.
F-DroidGitHub
Calendar Trigger
APK
Trigger various actions on different types of calendar event, and handle overlapping events wanting different ringer states in a sensible way (the "quietest" state wins). Also the start and end actions for an event can be delayed until the device is in some particular state.
F-DroidGitHub
Calisthenics Memory
APK
A privacy-focused bodyweight training tracker. Customize everything — exercises, training methods, and workflow — to match your needs. No rigid templates. Adapt the app to your training style. To Do • Plan your workout as a list, tap to jump directly • Schedule repeats by day of week to automate your weekly routine Record Mode • Quickly log your workouts after training Workout Mode • Auto-guided training with built-in timers • Single: Timer-assisted rep counting and isometric hold tracking • Program: Create and run multi-exercise routines in sequence • Interval: Timed work/rest cycles with customizable rounds • Programs and intervals are built by freely combining your own exercises Exercise Creation • Create any exercise with any name, organize into groups • Choose rep-based (dynamic) or time-based (isometric) tracking • Support for unilateral (one-sided) exercises • 10-level progressions to match your method • Optional distance, weight, and assistance tracking • Favorite exercises (★) for quick access • Add optional description notes to each exercise Progress Tracking • Calendar: See your training activity at a glance • List: Browse all sessions chronologically • Graph: Visualize trends with average/max/total stats • Challenge: Color-coded goal achievement tracking • Period filters (1 week, 1 month, 3 months) Data Management • Export/import in JSON/CSV format • Your data stays on your device, no internet required Convict Conditioning, StartBodyweight, RR (Recommended Routine), HIIT, circuit training — whatever your method, this app adapts to you.
F-DroidIzzyOnDroid
Call Limiter
APK
Call Limiter is a simple, open-source Android app that helps you take control of your phone calls. Set time limits for specific contacts and let the app automatically hang up when the limit is reached — making it easy to save time, avoid distractions, and manage conversations better. Features: Per-Contact Call Limits: Define custom call durations for individual numbers. Automatic Hang-Up: Calls are disconnected when the chosen time is reached. Easy Time Selection: Choose limits using a bottom sheet scroll wheel for a smooth experience. Global Call Limit: Set default time limit for all contacts. Persistent Storage: Your limits remain saved until you decide to change or delete them. Flexible Editing: Update or remove call limits anytime with ease. Emergency Buffer: Add a few extra seconds for urgent or unexpected needs. Modern Theming: Supports both light and dark modes, adapting to your system theme. Privacy-Focused: Works entirely offline — no internet, no tracking, no data sharing. Stay in control of your conversations with Call Limiter — lightweight, private, and designed to fit seamlessly into your daily calling habits.
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