Productivity

1843 open source Productivity apps

C
ChineseTtsTflite
APK
A TTS engine developed with Kotlin + JetPack Compose + Tensorflow Lite, which works totally offline. There are two models available: FastSpeech and Tacotron, both of which are from TensorflowTTS. Because the voice is generated in real-time, it has high performance requirements. The FastSpeech model works fast but the generated voice has poor anthropomorphic effect. It works well on a middle-end device. The Tacotron has high performance requirements. Though the overall effect is better, the speed is very slow. Therefore it's bundled only for test and can't be used in practice.
F-DroidGitHub
C
Ching Machine
APK
Automatic "ching" for practicing Thai music. * Sampled ching and glong sounds from real instruments. * Tempo selection. * Start playing with "chup chup" (the initial double-strike of the ching cymbals.) * Create your own drum patterns. I hope you enjoy this program! Please note that while this app contains both Thai and English translations and instructions for the most complicated functions, the majority of the user interface has been deliberately kept in Thai with the aim of encouraging interest in Thai script and the Thai language, as well as Thai music. I hope that the app also invites you, then, to be curious, push buttons, learn and explore, and have fun!
F-DroidGitHub
ChordReader 2
APK
Chord Reader 2 is an enhanced version of Chord Reader, developed by Nolan Lawson. It's an app that: fetches chord charts and tabulatures for your favorite songs from the Internet, saves them to a local file, displays them in an easy-to-read format with the chords highlighted in an autoscroll view, transposes the identified chords up or down, or you can add a capo, provides common chord variations, provides a setlist mode to play your songs subsequently in a predefined order. License: Chord Reader 2 is a free and open-source app under GPLv3+ license. Source Code: The source code is available here. Any bugs can be reported at the Issue Tracker. Donation: If you would like to donate, visit paypal.me/hollowbamboo.
F-DroidGitHub
Chrono
APK
Features Modern and easy to use interface Alarms Customizable schedules (daily, weekly, specific week days, specific dates, date range) Configure melody, rising volume and vibrations Configure snooze length and max snoozes Alarm tasks (math problems, retype text, sequence, more to come) Filter alarms (all, today, tomorrow, snoozed, disabled, completed) Clock Customizable clock display World clocks with relative time difference Search and add cities Timer Configure melody, rising volume and vibrations Timer presets Filter timers (all, running, paused, stopped) Stopwatch Lap history with lap times and elapsed times Lap comparisons Appearance Material You themes Highly customizable color themes Highly customizable style themes
F-DroidGitHubIzzyOnDroid
Cifras o letras
APK
There are three screens: * The menu screen, where you can choose language (with it's own statistical letter distribution) and timeout. * The numbers screen, where you can choose six numbers pushing units or decades and the goal is to get the closest possible to the target number using arithmetic operations. * The letters screen, where you can choose nine letters pushing vowel or consonant and the goal is to find the largest existing word using these letters. The game doesn't resolve any of the puzzles, it's just a random generator of numbers and letters.
F-DroidGitHub
Circuit Training (PFA)
APK
Privacy Friendly Circuit Trainer is an Android App that supports the user during their circuit training session. It provides a configurable set of timers for the exercises and the rest phases as well as multiple other features. Workout Timer After configuring the set of timers in the main menu you can start the workout routine by pressing the start button. The workout view has animations and sound output features which can be turned on and off inside the settings menu. Motivation Alert The app can show you motivation alerts to remind you of planned workout sessions. You can define the time of day and the notification texts inside the settings menu. Block Periodization When scheduling the timers you may also choose the block periodization feature. This feature allows you to configure longer, separate breaks in between the exercises. This way the workout can be split into multiple high intensity workout cycles. Workout History The app can collect statistics about your performed workout sessions. The collected data comprises of the time spend working out and the calories burnt while exercising. The accuracy of the calories calculation can be improved by configuring the necessary user data in the settings menu. The collection of this data can be deleted as well as turned on and off inside the settings menu. Exercise Sets The app allows you to create your own Exercise Sets for the circuit training. Therefore you can combine your own exercises to exercise sets. The image assigned to an exercise is displayed during the workout. In addition, the exercise sets can be repeated during a workout. For this you can set the number of rounds before starting the workout. How does Privacy Friendly Circuit Trainer differ from other similar apps? 1. No permissions Privacy Friendly Circuit Trainer does not require any permissions. The selection of images is done by a task to the gallery so the app does not have any access to the device's storage without the user's control and interaction. 2. No advertisement Many other free apps in the Google Play Store dazzle annoying advertising and also shortens battery life. Privacy Friendly Circuit Training is part of the Privacy Friendly Apps group developed by the research group SECUSO at Technische Universität Darmstadt. More information at: https://secuso.org/pfa You can reach us via Bluesky - @secusoresearch.bsky.social https://bsky.app/profile/secusoresearch.bsky.social Mastodon - @SECUSO_Research@bawü.social https://xn--baw-joa.social/@SECUSO_Research/ Job opening - https://secuso.aifb.kit.edu/english/Job_Offers.php
F-DroidGitHub
Cirno
APK
Cirno is an app freezer that runs on Android 12+ platforms, it is used to make background apps completely free of CPU resources to improve the overall smoothness of the device.Cirno is currently only supported on cgroup v2 devices, which means your Linux kernel version needs to be greater than or equal to 5.0.The app has no GUI. It will freeze apps automatically. By modifying the cfg file, you can specify that the application does not freeze.
GitHubIzzyOnDroid
ClassyShark3xodus - Scan apps for warnings
APK
Checks apps for code signatures of known trackers (provided by Exodus). Also can list all classes for launchable (via the app drawer) packages. Can be used against any APK: * installed: via an app manager or built-in ApplicationInfos/PermissionInfos, * downloaded: via any file manager (long press and open with ClassyShark3xodus), * launchable installed: via the first screen list (long press to display dynamic manifest). Note: doesn't work on odexed/system packages (it's a work-in-progress). Finally, the app doesn't sync or connect to the Internet and thus cannot sneak on end users. The app is updated when Exodus updates their list of trackers: https://reports.exodus-privacy.eu.org/api/trackers (Can display any *.xml file stored on the device.) Other features: - Selinux device & per app: appZygote + read_log + shareUser detection, - dynamic & static androidManifest, - full permissions device explorer (via Super#1), - complete apk(s) device explorer (via additional icon) - install & update Date per app, - certificate & fileSum fingerprints details at each scan. ClassyShark3xodus is based on Google's ClassyShark: https://github.com/google/android-classyshark (and apps_Packages Info: https://f-droid.org/en/packages/com.oF2pks.applicationsinfo/).
F-Droid
Clauncher
APK
Yet another Olauncher Fork where apps are invisible by default, you only need to type which apps you want to open. It should reduce your screen time from opening apps you didn't plan on opening. Would recommend using a grey or black wallpaper (for immersion?, idk just recommending) FEATURES * No ads * FOSS forever * Clean, fast and lightweight HOW TO USE * Swipe up to see all the apps and quick search * Swipe down for notification drawer * Long press home apps to change them * Important: Long press on empty space to open settings Once you open the settings, you'll see all the available options.
F-DroidGitHubIzzyOnDroid
Clay Tablet
APK
Clay Tablet is a simple and intuitive Android tool for cuneiform writing and practice. With Clay Tablet, you can adjust the size and the behavior of wedges to practice your cuneiform skills and create entire Mesopotamian texts from scratch! It has: - Basic drawing and writing features - A scrollable tablet canvas - Undo/Redo and eraser tools - Adjustable wedge sizes Future updates will include a transliteration logic and a complete cuneiform library. (C) 2025 Batuhan Erdogan
F-Droid
CleanShare
APK
An Xposed module for cleaning up Android's Share Sheet. Added settings app, Quick Share filtering, and delete-after-sharing for screenshots. Features: Hide Direct Share suggestions and block share target profiling Hide Quick Share / Nearby Share Option to delete shared screenshots after sharing (root required) Built-in settings app Requirements: Android 11 or higher and AOSP rom LSPosed framework
F-DroidGitHubIzzyOnDroid
Clear List
APK
Helps people to quickly capture what's on their mind and get a reminder later at the right time. Included are two clear and beautiful material designed themes to make use experience better. No remote server is used, data is kept on your device.
F-DroidGitHub
ClearClipboard
APK
The app is a quick way to clear the content of the clipboard with just one tap on the icon. Note: Only the current content of the clipboard is cleared, this app has no effect on other apps which manage your clipboard. This app does not work with Samsung or Google Pixel devices! Why ClearClipboard During use, apps can read the clipboard content and use it for their purposes. This app allows manual deletion of the clipboard to protect your own data. Features * Clears the clipboard with one tap Special * no advertising * no permissions needed
F-DroidGitHubIzzyOnDroid
Clinometer
APK
Basic Air Data Clinometer is a simple App to measure your device’s inclination angles with respect to gravity’s direction using the onboard accelerometers. It is a basic and lightweight App with geometric-inspired graphics that can be used as Clinometer or Bubble Level. It is intended to measure, not store data.A „Getting Started“ guide can be found here.IMPORTANT NOTE: Please go to Settings and calibrate it before use. The measurement’s precision mainly depends on the accuracy of the calibration: use a good horizontal and vertical reference.USAGES:Bubble Level (horizontal)Clinometer (vertical)Measure with the Camera (vertical only)MEASUREMENT:X (Yellow) = The angle between the horizontal plane and the horizontal axis of the screenY (Yellow) = The angle between the horizontal plane and the vertical axis of the screenZ (Yellow) = The angle between the horizontal plane and the axis that comes out perpendicular to the screenPitch (White) = The angle between the contour line (inclined, white) and the reference axis (horizontal or vertical, dashed white) on the screen planeRoll (White) = The angle between the screen and the horizontal plane
GitHubIzzyOnDroid
ClipShare
APK
Share the clipboard between your phone and desktop. Securely share text, files, and screenshots. ClipShare is a simple, lightweight, and cross-platform app for sharing copied text, files, and screenshots between an Android phone and a desktop.FeaturesShare copied textShare filesShare copied imagesGet a screenshot of the desktop to the mobileOpen the received links, files, and images from the appRe-share received files and images with other appsScan the local network to find server devices to connect withHighly configurableConfiguration options (of the Android app)Enable secure mode and add trusted devicesOption to auto-send files and textLimit auto-sending only to trusted devicesOption to save previously connected devices' addressesAutomatically close the app if it is kept idle (Idle time duration is adjustable)Enable IPv6 network scanningImport and export the above settings to move them to another device or to backup settingsThis is the Android client of ClipShare. You need the server program running on your desktop to connect with it. The server is available for Windows, macOS, and Linux. You can find the server here on GitHub. A desktop client for ClipShare is also available on GitHub.
GitHubIzzyOnDroid
Clipboard Beam
APK
If you have two devices with NFC and Beam (latter is standard with Android 4.1), you can share the contents of the device clipboard just by touching the devices together. If you don't have NFC you can make QR codes with https://f-droid.org/packages/com.google.zxing.client.android which can be read by another Android gadget with a camera.
F-DroidGitHub
Clipboard Cleaner
APK
As you may know, Android clipboard content and its changes can be got by any app, which is a security hole if you care about it. Any app can get your copied password, credit card numbers, and more. Android has AutoFill or other mechanisms to handle sensitive info. Android Q also fixes this problem partly. But there are still some ways to bypass the limit, like using accessibility services and showing a transparent window. ClipboardCleaner can't protect your passwords from being got by any app. But it gives you ways to check and clean your clipboard.
F-DroidGitHub
Clipeus
APK
Tiny app to clean clipboard. > It may not work on Samsung. For some reason Samsung doesn't clean clipboard on api call. No UI. Click on the app icon to clean clipboard. Also you can grant device & app notifications permission to clean clipboard automatically on screen off event (long tap on the app icon). Permissions: * NOTIFICATION_LISTENER - receive screen off events (optional) It is Free Open Source Software. License: GPL-3
F-DroidGitHub
C
Cloak
APK
A Cloak plugin for Shadowsocks. Cloak is a universal pluggable transport that cryptographically obfuscates proxy traffic as legitimate HTTPS traffic, disguises the proxy server as a normal web server, multiplexes traffic through a fixed amount of TCP connections and provides multi-user usage control. Cloak works fundamentally by masquerading proxy traffic as normal web browsing traffic. This increases the collateral damage to censorship actions and therefore make it very difficult, if not impossible, for censors to selectively block censorship evasion tools and proxy servers without affecting services that the state may also heavily rely on. Details on how Cloak works can be found here. Shadowsocks-android is required, as well as a Cloak-compatible proxy server.
F-DroidGitHubIzzyOnDroid
Clock
APK
Presenting a clock app which was totally made in Jetpack Compose! You can use this app’s timer and stopwatch functions, which are linked to workManager. The animation is added to the app to increase engagement. Moreover, the time is shown in a stylish sliding clock manner.But there’s more than that! Also, you can create one time and recurring alarms and edit, enable, and disable them.
F-DroidGitHubIzzyOnDroid
Clock Live Wallpaper
APK
This wallpaper shows a live/working clock. It is based on a tutorial session linked in the README.
F-DroidGitHub
Clock Screensaver
APK
This app displays a simple fullscreen clock which can be used screensaver. - analog and digital clock can be activated or deactivated individually - optional date and weekday view with custom format option - displays alarms and appointments from Android calendar or internal event database - adjustable background and clock color - can be set as Android system screensaver ("DayDream") on smartphones and tablets - compatible with Android TV devices - content can be moved slightly to prevent burn-in on OLED displays
F-DroidGitHub
Clock31
APK
Clock 31 is a Clock + Calendar combo widget for Android, inspired by (but not forked from) the cLock widget found in old versions of LineageOS. The widget shows the current time and date, the next alarm (if any), and upcoming events for all your calendars (the colors on the left indicates the calendar to which they belong). Some useful shortcuts are also provided: tapping the clock will bring you to the clock and alarm app, tapping the calendar icon will open the calendar, tapping an event will bring you to the details of that event.
F-DroidGitHubIzzyOnDroid
Closet-Archive
APK
Features - Adding a Clothing Item. - Filtring clothes. - Logging an Event. - Managing Collections. - Laundry alert/notification. - "Import" and "Export" your data localy.
F-DroidGitHub