Calendar

284 open source Calendar apps

Meditation
APK
This is a meditation timer. Minimalistic, reliable, and truly elegant. Features * Simple, elegant, and intuitive * No distractions - only the essential features * Beautiful assortment of bell and gong sounds * Custom volume adjustment of the bell sounds * Reliable countdown timer * Pre-meditation delay * Intermediate meditation intervals * Free and open-source software Description Meditation is a truly minimalistic countdown timer for meditation, with a clean user interface and no clutter. The minimalism of the app embodies meditation's actual purpose. A notable feature of the app is the ability to customize the volume of the notification bells independently of system volume. This allows you to set a predefined volume so that the sounds will reliably play at the same loudness every time. No more mid-meditation worrying that you remembered to turn the volume up! Another important feature is for the timer to be as reliable as possible, to ensure an accurate meditation time and prompt ending sound notification. This is achieved by starting a foreground service and disabling battery optimization. Reliability is of extreme importance to a meditation tool in order to eliminate all possible worries about the timer not behaving correctly. Just press the button and start!
F-DroidGitHub
Meditation Assistant
APK
This application assists with both timed (via duration or ending at a specific time) and untimed sessions, with numerous customizations, including start/interval/end sounds and device behavior. It also provides a monthly overview of your progress. A major feature in this application is the ability to share your sessions online. Though entirely optional, sharing your progress online adds another dimension to your accountability. Now that you've gone public, as your meditation streak increases more users will see it as a goal of their own. One user has posted over 500 days of consecutive days of meditation. Your meditation streak is the number of consecutive days you have recorded at least one session. As your streak grows, "not breaking the chain" becomes quite important. Soon you will be meditating once a day, even if it's five or ten minutes out of your schedule.
F-Droid
Meditation Timer
APK
Meditation Timer for Android is a free, open source app that can count and beep. It helps with repeating tasks, such as meditation. In essence, it is a simpler version of Foto Timer, and a rewrite of the original Meditation Timer for PalmOS from 20 years ago. Meditation Timer is working with "processes", which define how Meditation Timer counts, and how often it beeps. Processes can also be "chained" together, meaning that a process can automatically lauch another. Meditation Timer contains absolutely no AI whatsoever.
F-Droid
MeeRoo
APK
MeeRoo is an Android app to manage reservations for meeting rooms.Main purpose of this app is to display the availability of an meeting room. It is expected to have one tablet or phone next to the meeting room to see if it is available, see the current and upcoming meetings and reserve the room now or in the future. There is an overview for all meeting rooms, too. This makes it easy to find available rooms or a current meeting very quickly.How it worksThe app reads calendar and event data stored on the device. To get this to work the calendars must be configured in the android calendar on the device. On the first start of the app you have to choose the calendar mode (for synchronization). This is necessary, because Google Calendar marks meeting rooms as resources. With CalDav synchronised calendars are storing every calendar as normal calendars, no difference between a personal calendar and a meeting room (resource).Supported calendar synchronizationsGoogle CalendarCalDav Calendar
GitHubIzzyOnDroid
Meeting Cost Clock
APK
Clock, which measures the time in a currency value (EURO or Dollar). It can show, how expensive a meeting will be taking into account the number of participants and a mean value of a price per person per hour.
F-Droid
Metric Time
APK
This app provides a widget for your home screen that shows the current time in Metric Time (Decimal Time). You can read more about this time format here https://en.wikipedia.org/wiki/Decimal_time.
F-DroidGitHub
Micro Timer
APK
Micro Timer is a tiny, microwave-inspired timer app for Android. Instead of inventing yet another clever, pretty, tedious method of inputing time, Micro Timer uses the tried-and-true 10-key pad commonly found on microwave ovens.
F-DroidGitHubIzzyOnDroid
Min Time
APK
Min Time is a countdown app. It's main goal is to help you structure your talks and presentations. It divides the talk time into three phases: green, yellow and red. With a glimpse you get an idea how much time is left. For example, a 70 minutes talk could be divided into 50, 15 and 5 minute segments. Once started, Min Time counts down from 70 to 0, changing colors and vibrating when a new phase is reached. During presentation you can switch to other apps. The app is intentionally kept simple. Just a few taps and you are ready to give your talk. To finish your presentations and tasks just in time.
F-Droid
MinCal Widget
APK
A Minimal Calendar Widget that's always on current date's month. Features: * Contains no ads or payments * Always on current date’s month * 3x2 (resizable) * Displays all events from your calendars with a symbol set (high number becomes generic) * Native widget configuration access or press widget’s top right corner * Pressing on any other part of the widget opens calendar application * Configurable: start day of the week, calendar (gregorian or holocene), show declined events, focus on current week, open calendar on clicked day, theme, symbol set, symbol set colour, transparency, text size
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.
GitHubIzzyOnDroid
Minidoro
APK
Minidoro is a very minimalist but reliable Pomodoro® timer, following Pomodoro® Technique very rigorously. Pomodoro® Technique is extremely simple but efficient time management technique developed by Francesco Cirillo. The proposal is it's easier to concentrate on work for a relatively short period (i.e., 25 min) keeping in mind you can take a rest or switch to another activity after that. That's very simple: You split your work for 25 minute intervals, separated by short break periods In these 25 minute intervals try to focus on your work as much as possible, try to not distract yourself and to avoid other distractions After a 25 minute interval take a 5 minute break. During this break do any other activities except for the previous work Return to the work after the break (or not, if you've finished) Take a long break about 10–30 minutes after every 4 work intervals Full Pomodoro® Technique description on the author's website The Minidoro app may help you in Pomodoro® Technique adoption! Minidoro has: Minimalist user interface: only countdown screen with big digits, it's on all the time while timer's on See only how much time left, no other distractions It may turn Do-not-Disturb Mode in your device, no other apps will distract you You may count your distractions, by yourself or by outside You may set up your preferences: periods duration, long break frequency, notifications Dark theme (the only) No ads Works on any Android device, phone, table or watch, you may utilize even your old smartphone Proper work on Samsung® phones and tables (https://DontKillMyApp.com is not applicable) Wear OS notice It would be a great feature that Minidoro running on Wear OS turns DnD mode on both Wear OS and Android device. It should be generally possible since Wear OS may turn DnD on Android devices. But there's one nuisance. It's not possible to allow any app to operate DnD Mode in Wear OS from Wear OS UI. The only way to allow Minidoro to operate DnD in Wear OS is ADB command (no root should be needed). Install Minidoro, turn Wear OS in debug mode and connect to computer. After that for Wear OS 2.2 (based on Android 9) and above run this: "adb shell cmd notification allow_listener com.github.ympavlov.minidoro/com.github.ympavlov.minidoro.dnd.DndModeServiceV21" For any other Wear OS version below (based on Android 8.1 and below) use this: "adb shell settings put secure enabled_notification_listeners com.google.android.wearable.app/com.google.android.clockwork.stream.NotificationCollectorService:com.github.ympavlov.minidoro/com.github.ympavlov.minidoro.dnd.DndModeServiceV21" Pomodoro® is a registered trademark Francesco Cirillo. This app is not affiliated with Francesco Cirillo.
F-DroidGitHub
Month Calendar Widget
APK
A Month Calendar widget for Android 4.1+ Month Calendar Widget is a simplistic, cute widget that delivers you a quick overview of the respective month and was written in a way to respect your privacy.
F-DroidGitHub
Moon Phase
APK
Shows the real time view of the Moon, providing information about the current moon phase. This code has been originally belonged to the set of "shallow sky" astronomy applets, developed by Akkana Peck as long ago as in 1996 to run on Sharp Zaurus PDA.
F-DroidGitHub
MorphClock
APK
A simple and beautiful bedside clock. Features: * One time morphs into the next as time ticks by. * Background changes to match the sun's position where you live. * Large, easy-to-read time, appropriate to any device. * Subtile animations don't distract from work or sleep.
F-DroidGitHub
My Banq
APK
Connect to BAnQ (Bibliothèque et Archives nationales du Québec), the Library and National Archive of Québec, and keep track of the borrowed items linked to your subscription. Features include: * List your borrowed items * Receive notifications when the return date is approaching * Renew your borrowed items * Add several BAnQ accounts
F-Droid
NFC Alarm Clock
APK
Customize how your alarms look, easily create/delete alarms, and more. Each alarm can be configured however you want to use it. For those that struggle to wake up, you can restrict the volume or have it gradually increase when your alarm goes off. You can also use an NFC card or tag to dismiss your alarm. See the full list of features below for a more detailed look into all the things you can do. Features: * Edit and view alarms all in one screen. * Swipe left to delete an alarm. * Swipe right to copy an alarm. * Play music from your phone to wake up. Can even choose to play all the music in a folder. * Use NFC to dismiss an alarm. This is optional and can be set on a per-alarm basis. Found by selecting the gear icon next to the volume slider of an alarm. * Gradually increase the volume when your alarm goes off. This is optional and can be set on a per-alarm basis. Found by selecting the gear icon next to the volume slider of an alarm. * Restrict changing the volume when your alarm goes off. This is optional and can be set on a per-alarm basis. Found by selecting the gear icon next to the volume slider of an alarm. * Text-to-speech when your alarm goes off. It will say the current time to you at whatever cadence you choose. This is optional and can be set on a per-alarm basis. Found by selecting the gear icon next to the volume slider of an alarm. * Choose which audio source you want the alarm sound to play out of (Alarm, Call, Music, Notification, Ringtone). This is optional and can be set on a per-alarm basis. Found by selecting the gear icon next to the volume slider of an alarm. * Customize the colors of: the theme, name of the alarm, days in which the alarm runs, time, and AM/PM. Found in Settings › Appearance. * View statistics of how many alarms you have dismissed/snoozed/missed, and how many you have created/deleted. Permissions: * NFC: (Optional) Allow the app to detect NFC tags. * Storage: (Optional) Read music that is stored on the phone. You are prompted to enable this permission if and only if you choose to play music as the alarm ringtone. Otherwise, this permission is unused. * Vibrate: (Optional) Allow the app to vibrate the phone. * Startup: (Required) Restore alarms when the phone is turned on. By default, Android will delete alarms when the phone is turned off. * Wakelock: (Required) Prevent the phone from sleeping so that an activated alarm will continue to go off.
F-DroidGitHubIzzyOnDroid
Nanji clock widget
APK
Home screen clock widget for language learners. - Chinese, Japanese, Korean, Russian, English and default date/time format - 12/24 hours time format - Japanese era date format - Customizable time zone - Highly customizable appearance - Switch between showing digits/words on tap - Open system alarm app on tap
F-DroidGitHub
N
Nextcloud Calendar
Web
CalDAV calendar app integrated with Nextcloud.
NoFb Event Scraper
APK
The purpose of this application is to get access to Facebook events without an account. Therefore it does not use the Facebook API. Instead it opens the Facebook event URI and downloads the website HTML code. This source should contain the event information in form of structured data. That data is extracted and used to create Android events. Features: * Does not use Facebook API * Supports "open-with" and "share-to" * Independent from Facebook regional sub-domain URLs * Saves history of scraped events * Handles upcoming events from pages
F-DroidGitHub
NoNonsense Notes
APK
Open source notepad and to-do list app using the latest Android technologies. * Dash clock support (yes, it still works) * Notifications: set reminders at a certain time, with optional repetition on certain weekdays * Language selection * Widget, with lockscreen support, resizeable and configurable * Password-protect important notes * Move tasks between different lists * Drag to reorder tasks * Integration with Android Agenda widget * Search * Use emojis as tags 🏷️ * Light and dark themes * Back up (import and export) notes to a JSON file * Sync with an ORG file on the local storage * note history with all previous versions * recycle bin for deleted notes To improve this app, make a donation, or simply share ideas, come visit at https://github.com/spacecowboy/NotePad
F-DroidGitHub
Notable Plus
APK
Allows you to set reminders and notes in your notification bar. Features: * Multi-line reminders * Alarms * Reminder History * DeskClock Extension! * Detail screen to see more information * Different color flags (icons) * Voice recognition shortcut * Swipe to remove reminder (option to turn it on/off in options) * Option to turn a quick shortcut on and off in the settings * Quick Share to Notable * Design inspired from the Holo / Google Now cards * Click to dismiss the notification * Restore previous reminders after a reboot * (Android 4.1+) Edit notifications, expandable notifications * (Android 4.1+) Hide the checkmarks from the status bar by setting priority as MINIMUM
F-DroidGitHub
Note Calendar
APK
Note Calendar is a customizable offline app which allows you to manage notes for each day and offers a way to quickly reach for each of them. App does not contain ads.App possibilities:Day tab presents selected day information and note assigned to that day. It also provides a straightforward way to add, edit and delete note.Week tab holds a list of days to quickly move to other day of the week.You can easily see which days contain note via month tab. If a number of the day of the mounth is surrounded by a ring, then it contains a note.Application offers notifications which can be enabled to remind you of a note created on the next day at a given time. For example you can set notification time at time before your alarm clock time in order to wake up and read note about something important to do.Settings tab includes:Theming:Setting custom theme which includes 10 modifiable colorsSetting light themeSetting dark themeSetting default theme based on system settingsNotes deletionNotifications management:Enabling or disablingSetting notification timeSetting first day of week
GitHubIzzyOnDroid
Noted
APK
Noted is your all-in-one entertainment tracker for movies, TV series, books, and games. Organize your entertainment journey with todo and finished lists, and experience our unique monthly rollover that moves completed items to history while letting you carry over unfinished ones.Key Features:Track entertainment across Movies, TV Series, Books, and GamesSmart monthly rollover with history archivingSearch new titles using RAWG, TMDB, and Google Books APIsDetailed item information with descriptions, ratings, and imagesConsumption statistics and history trackingCustom API key supportLocal backup/restoreDynamic theming (auto-monthly or manual)Multi-language localization supportNever lose track of your entertainment adventures again. Manage your watchlist, discover new favorites, and analyze your habits—all in one minimalist designed app.
GitHubIzzyOnDroid
Notification Cron
APK
Notification Cron is a straightforward tool to schedule recurring notifications on your phone without adding calendar entries.
F-DroidGitHub