Calendar
284 open source Calendar apps
Tuta Calendar
APK
Take your privacy to the next level with the secure Tuta Calendar app. This encrypted time-management tool is the most private way to organize your busy schedule – and it’s quick to navigate, comes with dark and light mode, plus, it’s perfectly integrated with the Tuta Mail app. SECURE CALENDAR * Quantum-safe encryption: End-to-end encrypted data exchange with all Tuta Calendar users and with users of other calendar apps (via optional password-protected event invites). * No ads, no tracking, and no data sharing: We protect your privacy. * Zero-knowledge architecture: Entire events, including event notifications, are encrypted and hidden from our servers. We do not know when your meetings are taking place, who they are with, or what they are about. * Based in Germany: All data is safeguarded by strict German data protection laws. * Fully GDPR-compliant FULLY FEATURED * **SYNC ON ALL DEVICES:** Your Tuta planner syncs automatically on all devices and browsers. * **RECURRING EVENTS:** Use daily, weekly, monthly, yearly or custom repetitions. * **MULTIPLE CALENDAR VIEWS:** Switch in one tap between agenda, daily, weekly, and monthly view. * **SYNC EXTERNAL CALENDARS:** Events will automatically sync if the owner adds or updates events or meetings on external calendars. Once subscribed, no action is needed. * **MANAGE UNLIMITED CALENDARS (paid feature):** You can toggle different calendars into view with a single press or leave all events visible for a complete overview. * **EVENT REMINDERS:** Never miss a date. Tuta’s zero-knowledge reminders make sure you never miss an appointment. * **LINK CALENDAR EVENTS TO EMAILS AND CONTACTS:** Your Tuta Calendar is directly linked to your Tuta Mail account, so when creating events you can easily invite your contacts or send invites to others via email. * **OFFLINE SUPPORT:** Independent standalone app so you can check your schedule both online and offline!
F-DroidGitHub
Ubuntu Countdown Widget
APK
Keep an eye on the days remaining before the new Ubuntu release! Features: A resizeable square widget Ability to set a custom date Built with an eye on battery consumption (widget refresh once per day) Light and Dark themes
F-DroidGitHub
Unix Time Clock Widget
APK
Adds a widget that displays Unix Epoche.
F-DroidGitHub
Vacation Days
APK
See when you’re free and plan holidays. At a glance. View your vacation days in one of two layouts: a timeline or a calendar. Counters in the top bar show your vacation days for the current year — and how many are left. Sorted in seconds. Tap the floating button to add new vacation days. Enter a name, swipe to select a date range, and you’re done. Switching phones? Back up all your data on one device and restore it on another. Make periodic backups to keep your data safe. Night owls, rejoice. A beautiful Dark Mode for late-night viewing. Toggle it automatically or have it follow the system appearance. Webpage: https://www.crazymarvin.com/vacation-days Translate it on Hosted Weblate: https://hosted.weblate.org/engage/vacationdays/ Libre software on GitHub: https://github.com/Crazy-Marvin/VacationDays
F-DroidGitHubIzzyOnDroid
Valentin's PowerTools #003 - Gesture Drawing Pract
APK
This is Gesture Drawing Practice, an open source app for artists. It displays your selected pictures from the gallery, each for a set amount of time (like 1 minute). There are options to display a countdown timer and duration of pause (blank screen) between pictures Features * 🤖 select multiple pictures, order is preserved (!) * ⏲️ choose from 4 different usual time options for practice * 😴 choose from 4 different useful pause options * 🎨 options for visibility and appearance of the count down timer Usage * Tap the big red button * Select your pictures from the gallery * Change settings or leave it as it is * Tap "Start Session" Created with ❤️ by Valentin Tags: gesture drawing, practice, slide show, timer, countdown timer, artist, comic book, illustrator, drawing, draw, persons, line-of-action
F-DroidGitHubIzzyOnDroid
Valentin's PowerTools #005 - Roll Some Dice
APK
Hello dear fellow human or humanoid robot! This is Roll Some Dice, an app developed solely for the purpose to speed up your dice rolling procedures in board games that use two dice and their respective distribution of results. Everything is calculated locally, nothing is saved. Nobody will ever learn about your specific gam(bl)ing habits :) Features: * 🎲🎲 2 Dice: more than one! * 🧭 4 way display: The result will be displayed in all 4 directions ensuring ample visibility for all players. * ⏲️ Small Delay: There is a 727ms delay between dice rolls to prevent accidental or purposeful double rolls. Usage: * Press the big red button. * In the next screen each tap anywhere rolls the dice. Created with ♥️ by Valentin Tags: Würfel, Würfel App, Dice, Dice Roller, Random Number Generator, Random, Coinflip, Die
F-DroidGitHub
Valentin's PowerTools #016 - Tomato Potato Clock
APK
Welcome to Tomato Potato Clock. This is a classic pomodoro timer (this version: distraction-free). Right now: Alternating sections of 25 and 5 minutes - running in perpetuity (till stop/close app). If you found this app, you know what kind of person you are ;). Hence, there no options at all and you also cannot pause the timer. This is part of the design of this app. Good luck with your endeavours. Features - ⚫ Distraction-free: No status or navigation bar, no numbers, no letters - just visual and acoustic feedback of time. - 🎶 Sounds: A sound is played each time a new slice/section begins. Gifted to you by Valentin ❤️ Tags: Pomodoro timer, procrastination, student, learning, studying, productivity, 'lofi hip hop radio 📚 - beats to relax/study to', work, code, do boring but necessary stuff, paper work, time blindness, special needs, minimal design, one button app
F-DroidGitHubIzzyOnDroid
Valentin's PowerTools #036 - Ease The Waiting
APK
Welcome to Ease The Waiting. This app is designed to ease the waiting for scheduled events in the future, such as special holidays, your birthday, or anything else. 🎉🎂🌴 It displays the number of days until the event and (optionally) a personal background image for each event. How it works: * Just tap the big red button ("Add Event") to add your first event. * In the next screen: * Enter title and date * Optionally, choose a custom background image for this event by tapping the preview field beneath title and date. 📝🗓️🖼️ * Save event by tapping the big red button that says "Save". * You will now be back on the main screen and see your event * To add more events, either tap the "+" sign in the bottom left, or scroll to the bottom of the event list and tap the "Add New Event" button. * For a visually appealing experience like in the screenshots, use attractive images! Features: * 🔤 2 visual presets - Switch between big and small text modes by tapping the A, resp. B button next to the "+" button in the bottom line. * ✏️ Edit existing events - Tap on an event to modify its details. * 🔴 Live preview - See how your event will look as you add or edit it. * 🚀 Simple introduction - The app provides clear instructions if no events are added. Created with ❤️ by Valentin.
F-DroidGitHubIzzyOnDroid
Vedroid Events
APK
Vedroid Events - simple birthdays and events remainder app without any stupid useless "smart" features and options. No need of the google services • Create notifications for birthdays or events • Set up an additional appointment prior to event
F-Droid
VerveDo
APK
VerveDo is a concise to-do app that follows Material 3 Expressive. You can use it to keep track of your daily school homeworks or as a memo for everyday life. You can set priorities to each task and sort them, helping you stay organized and in control of your life.
F-DroidGitHub
Warpclock
APK
Warpclock provides a quick shortcut for setting alarms based on your preferred amount of sleep. No more mental math before bed - after a single button press, your head can hit the pillow and you will warp forwards in time with minimal interruption. How to use When you open Warpclock for the first time, you should configure your preferred amount of sleep using the in-app controls. There are buttons to increase and decrease the amount by 1 hour, 10 minutes, and 1 minute. You only need to set this once. There is also a button labeled "Set alarm" inside the app. Pressing this button will create a new one-shot alarm in your default alarm clock app, configured to wake you up after your personalized amount of time has passed. The alarm will automatically delete itself from your alarm app once it has triggered, keeping your list of saved alarms clean. Once the alarm is created, you'll get two toast notifications. The first notification is from Warpclock, displaying the time that the new alarm should go off. The second notification comes from the system alarm clock, confirming that it was created sucessfully and displaying how far in the future the alarm will occur. The app also exposes a widget that you can add to your homescreen for even faster access. In the default launcher, just long-press on your homescreen background and drag the "Warpclock" widget to a location on your homescreen, and drag the edges to resize as desired. Tapping on the widget text will create a new alarm just as if you'd pressed the "Set alarm" button in the app. You'll get the same two toast notifications as well. The alarm is created in your default alarm clock app, so you should use that to configure the default alarm sound and vibration settings. Once an alarm is created, if the trigger time needs to be adjusted, that should also be done in the default alarm clock app. Current limitations This app currently does not handle Daylight Savings Time changes, it simply adds the configured amount and rolls over at 24 hours. You'll need to manually fix a couple of alarms per year if you live in a region that still changes the time back and forth.
F-Droid
W
Was geht App?
APK
Features: - Thousands of events per bigger city every month - Fulltext event- and location-search - Clearly arranged categories - Mostly with detailed information about each event, including text, photos, videos and links to the organizer / source - Simple search for events for children or with free entry - Location-Event-Listing - individual favorit- and blacklisting of locations - possibility to share choosen events to your android-event-calendar - Link to maps from detail view - Maps-view of the events with category-symbols - Preview of events in your area using media such as youtube, soundcloud, bandcamp,.. - Small installation size & low memory consumption If your german city is not listed, or you are missing dates, please send us an email to info@wasgehtapp.de and we will try to find a solution as soon as possible! We are also happy about suggestions for improvement!
F-DroidGitHub
Widget for Trello™
APK
Widget for Trello is an android home screen widget. Choose and display lists from your Trello boards on your home screen for a quick glance at your cards.
F-DroidGitHub
WiseRadar
APK
View live weather radar imagery from the Canadian government. The weatherdata is available under a non-commercial license. With GPS integration in addition to all the features available at Environment Canada's website WiseRadar removes all the hassle from checking up on the latest storm front. This app was designed for minimal headaches and just to-the-point radar imagery. Key features include: * All radar locations Canada wide! * Pinch zoom on images to see just how close the storm is to your home * Show your exact location on the image using your device's GPS sensor!
F-DroidGitHub
Work Tracker
APK
Work Tracker is a comprehensive and user-friendly app designed to help you keep a record of your work hours. With its intuitive interface, you can effortlessly log in and out of your shift, no matter where you are. Whether you’re clocking in at the office or logging your hours from home, the app has got you covered.The app accurately tracks the time you spend working and generates detailed reports on your work hours, so you can keep a record of your daily, weekly, and monthly hours worked. With Work Tracker, you’ll never have to worry about losing track of your hours or misplacing manual time sheets.
GitHubIzzyOnDroid
WorkTimer
APK
WorkTimer is an app that helps you to structure your work time and to stay productive by applying the Pomodoro Technique®. You can set the duration of your work sessions, short breaks, long breaks and the ratio of breaks to work sessions. The app notifies you when a session is over and can even enable Do Not Disturb mode to prevent distractions. It also reminds you to drink water and can keep the screen on while in use.
F-Droid
Working Time Account
APK
Working time account is used to record your personal working hours and time off and to prepare them clearly. What can the working time account do? - Record working hours - Calculate overtime - Document absences (sick, vacation, etc.) - Record any additional values (work locations, notes, expenses, travel times, etc.) and include them in the calculation of earnings and hours - Manage vacation days - Various overviews (year, month, week and day). Manage vacation days - Display various overviews (year, month, week and day) with working time calculation in the app - Generate configurable reports as PDF, CSV and iCal files and forward them to printer, mail or messenger apps - Manage multiple workstations, projects or clients - Create data backups (also autom. two shift models (alternating shift and partial shift) - several working time models (rolling week, monthly hours, 5-day week, 6-day week, x-day week) - stamp hours with NFC - Import public holidays from .ics files and enter them automatically in empty days The app includes a manual as a PDF file, which explains all the app's functions and provides an introduction to working time calculation. What the app can't do - display advertising - display cat videos or pictures - pass on your data to third parties - place orders online - save the world Thanks to - everyone who helped me with bug reports, suggestions and criticism - Freepik.com & dr. Web for the Human Pictos - the team "Code-Troopers" for their project "BetterPickers" - the teams of IzzySoft and F-Droid for their support in publishing Required permissions - writing files to save the reports and database backups - reading files to restore backups Please note that I am not liable for the correct functioning of the software or the entered/calculated times. In case of malfunctions or other oddities, please contact me (askanimus@gmail.com) so that we can find a solution together.
F-DroidIzzyOnDroid
Working Time Alert
APK
Enter when you started working, how long was your break and see how long you have been working and when it's time to leave.
F-DroidGitHub
World Clock v2
APK
World Clock is a Flutter app that displays the current time and weather for various cities. The app uses the Material You theme to provide a modern and unique user experience.Feel free to suggest features, ideas or new cities to add over GitHub issues!Features:Displays the current time for selected cities (>180)Shows the current weather (temperature, weather conditions) for the selected cityDynamic Material You theme, adapts to the color scheme of the systemHighly customizable settings
GitHubIzzyOnDroid
W
World Weather
APK
Displays current weather and forecasts from OpenWeatherMap. Two kinds of forecast are available: 14-day daily weather and 5-day three-hourly weather. You can select any of the 200,000 cities supported by OpenWeatherMap. NonFreeNet: OpenWeatherMap service is not open.
F-DroidGitHub
WriteOn: Simple Notepad
APK
WriteOn is a note-taking app designed with simplicity and usability at its core — perfect for students and everyday use. 🛠️ Key Features: • ☁️ Backup & Restore notes (offline & WebDAV supported) • 👁️ Screen protection (prevents screenshots & previews) • 🖋️ Markdown support for rich text formatting • 🎨 Customizable themes for light/dark comfort • 📶 Works both offline and online • 🔒 Privacy-respecting – no access to your personal data • 📝 Export notes to .txt format and more • 📷 Attach and view images inside notes • 📅 Built-in calendar for instant checking • 📌 Pin notes to your notification panel (requires notification permission) • 🌈 Visually calming and intuitive interface • 🧮 Built-in calculator for easy access • 🎓 Flashcard mode for studying and others This app is a fork of Easynotes. Updates and new features are driven by user feedbacks. With more improvements coming soon.
F-DroidGitHub
YA Habit Tracker
APK
YA Habit Tracker is a simple and effective tool to help you build and maintain positive habits. It helps you track your progress and stay motivated. Features: * Create and customize habits * Track your progress with a simple interface * View your streaks * Minimalist and user-friendly design * No ads and completely free to use
F-DroidGitHubIzzyOnDroid
Y
Yatoo
APK
Never waste time thinking about what you could do next. Yatoo's filter system shows you only what is relevant at the moment. It lets you get things done efficiently. Your todo list will stop growing infinitely. This is still in a very early stage of development. Lots of planned features are not available yet!
F-DroidGitHub
Yeeemp
APK
Yeeemp — simple tag-based event tracker used to keep track of things you do and experience. You can make different queues for movies, books, meals, or whatever you want to track. Features: - Multiple Queues: Organize events into different queues. - Detailed Records: Add tags, descriptions, and a date for each event. - Privacy Focused: Your data stays on your device. - Backup & Restore: Easily save and restore your data from a backup file.
F-DroidGitHub