Calendar
284 open source Calendar apps
B
Bits & Bäume 2022 Schedule
APK
Programm App für die Bits & Bäume Konferenz https://bits-und-baeume.org Die Konferenz für Digitalisierung und Nachhaltigkeit vom 30. September bis 2. Oktober 2022 an der TU Berlin Funktionen: * Tagesüberblick über alle Programmpunkte (Vorträge und Self-Organized Sessions) * Beschreibung von Veranstaltungen lesen * Veranstaltungen in persönlicher Favoritenliste verwalten * Favoritenliste exportieren * Alarm für Veranstaltungen setzen * Veranstaltungen in Kalender eintragen * Link zu Veranstaltungen mit anderen teilen * Programmänderungen einsehen * Bewertungen und Kommentare für Vorträge und Workshops hinterlassen * Integration mit dem Engelsystem https://engelsystem.de - Online-Tool für Helfer- und Schichtplanung auf großen Events * Integration mit Chaosflix https://github.com/NiciDieNase/chaosflix - Android App für https://media.ccc.de, teile Fahrplan-Favoriten mit Chaosflix und importiere sie als Bookmarks 🔤 Unterstützte Sprachen (Programmtexte ausgenommen) * Deutsch * Englisch * Französisch * Italienisch * Japanisch * Niederländisch * Polnisch * Portugiesisch * Russisch * Spanisch * Schwedisch 💡 Inhaltliche Fragen zum Programm kann nur das Content-Team der Bits & Bäume Konferenz beantworten. Diese App stellt lediglich das Programm zur Verfügung. 💣 Fehlerberichte sind herzlich willkommen, aber achte darauf, dass du erklärst, wie man den Fehler reproduzieren kann. Bitte nutze den Issue-Tracker: https://github.com/EventFahrplan/EventFahrplan/issues. 🏆 Die App basiert auf der EventFahrplan-App https://play.google.com/store/apps/details?id=info.metadude.android.congress.schedule für den Kongress des Chaos Computer Clubs. Der Quellcode der Anwendung ist auf GitHub https://github.com/johnjohndoe/CampFahrplan/tree/bitsundbaeume-2022 zu finden. 🎨 Logo-Design: gemeinfrei
F-DroidGitHub
Blitz: Fischer Chess Clock
APK
A chess clock made for blitzDefaults to 5+3 Fischer timing: 5 minutes + 3 seconds per moveFIDE-compliant: initial time for 5+3 is 5:03, not 5:00Privacy-friendly: no ads, no permissionsFast and intuitive controlsTouching the screen switches to the next playerHorizontal and vertical dragging set the time and incrementHaptic feedback is enabled by setting the ringtone to vibrateBack gestures pause and reset the clockRobust time implementationUses the most precise time source available on the deviceClock implementation tested with 100% code coverageFree and secureFree software with reproducible buildsMeets Android 15 security requirementsEnables memory tagging on compatible devices
F-DroidGitHub
Boardgame Clock (Privacy Friendly)
APK
Privacy Friendly Boardgames Clock offers stopwatches and timers to support time tracking while playing boardgames. The app offers different modes depending on the game that is played. If the game is round based players and round times can be continued. The app tracks the time that the player needs in each round and alerts the player if he or she takes too much time. Privacy Friendly Boardgame Clock furthermore offers a time tracking mode. This is a stopwatch for each player that participates in the game as well as for the overall game time. How does Privacy Friendly Boardgame Clock differ from other similar apps? 1) Minimal permissions Privacy Friendly Boardgame Clock does request to storage permission in case the data is backed up. 2) No advertisement Moreover, Privacy Friendly Boardgame Clock completely relinquishes advertisement. Many other apps in the Google Play Store display advertisement and therefore might violate the users privacy, shorten battery life or use mobile data. Privacy Friendly Boardgame Clock 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 Feel free to contact us via: Twitter - @SECUSOResearch https://twitter.com/secusoresearch Mastodon - @SECUSO_Research@bawü.social https://xn--baw-joa.social/@SECUSO_Research/ Job opening - https://secuso.aifb.kit.edu/english/Job_Offers_1557.php
F-DroidGitHub
B
Bodhi Timer
APK
An elegant minimalist count-down timer
F-DroidGitHub
Break.Down.Timer
APK
This is a handy timer that lets you set notifications ("breaks") during the timer's duration. Imagine this scenario: You have 45 minutes for a walk and should return halfway through. So, set the timer duration to 45 minutes, define a break at the halfway point, and start the timer. You will now receive a notification (audio, vibration, device notification) once the halfway point is reached, AND, of course, when the entire time has elapsed. Other scenarios include notifications every 15 minutes to keep track of the elapsed and remaining time. Or to receive notifications shortly before the timer expires. The notifications are coded as audio signals and/or vibrations so you can recognize the breaks without having to look at the display. The pattern is very simple: A short beep means "1," a long beep means "5." "Beeeeep beep," for example, means "6." All signals begin with a short "bep-bep" sequence to attract your attention. Thanks to the audio and vibration patterns, you'll be notified of the timer's progress without having to take your smartphone out of your pocket. This is especially convenient during workouts or other outdoor activities. Features: - Up to 20 notifications ("breaks") during a timer run - Audible and haptic feedback - Intuitive patterns to indicate the current reached break - Two different timer modes, "Timer" and "Clock" - Various predefined "break" presets - Save your own presets - Various color and audio schemes For more information see bdt.jepfa.de If you like the app please star it on Github
F-DroidGitHub
C
CLT 2026 Schedule
APK
Programm der Chemnitzer Linux-Tage (CLT) https://chemnitzer.linux-tage.de Funktionen * Tagesüberblick über alle Programmpunkte * Beschreibung von Veranstaltungen lesen * Veranstaltungen in persönlicher Favoritenliste verwalten * Alle Veranstaltungen durchsuchen und filtern * Favoritenliste exportieren * Alarm für Veranstaltungen setzen * Veranstaltungen in Kalender eintragen * Link zu Veranstaltungen mit anderen teilen * Programmänderungen einsehen * Automatische Aktualisierung 🔤 Unterstützte Sprachen (Programmtexte ausgenommen) * Dänisch * Deutsch * Deutsch, Österreich * Englisch * Finnisch * Französisch * Italienisch * Japanisch * Litauisch * Niederländisch * Polnisch * Portugiesisch, Brasilien * Portugiesisch, Portugal * Russisch * Spanisch * Schwedisch * Türkisch 💡 Inhaltliche Fragen zum Programm kann nur das CLT-Team beantworten. Diese App stellt lediglich die Programmpunkte zur Verfügung. 💣 Fehlerberichte sind herzlich willkommen! Bitte achte darauf, dass du erklärst, wie man den Fehler reproduzieren kann. Der Issue-Tracker findet sich hier: https://github.com/EventFahrplan/EventFahrplan/issues 🏆 Die App basiert auf der EventFahrplan-App https://f-droid.org/packages/info.metadude.android.congress.schedule/ für den Kongress des Chaos Computer Clubs. Der Quellcode der Anwendung ist auf GitHub https://github.com/johnjohndoe/CampFahrplan/tree/clt-2026 zu finden. 🎨 CLT-Design von Sebastian Pettke.
F-DroidGitHub
C
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
CalSync - Notification Calendar Sync
APK
⚠️ Note: This app is designed specifically for Simplified Chinese environment and only supports Chinese time expression parsing. Automatically create calendar events from notifications received from work and social apps by parsing Chinese time expressions. Features: • Automatically recognizes Chinese time expressions in notifications (e.g., "明天下午3点" = tomorrow 3pm, "周五晚上8点" = Friday 8pm) • Supports rich Chinese relative time parsing ("3天后" = in 3 days, "1个半小时后" = in 1.5 hours) • Supports fuzzy time expressions ("今晚" = tonight, "下午" = afternoon, "周末" = weekend) • Customizable keyword filters and app whitelist • Multiple calendar selection support • Fully offline, no internet permission required • Privacy-respecting, data never leaves your device Use Cases (Chinese social/work apps): • WeChat/QQ group notifications: "明天下午3点开会" (meeting tomorrow 3pm) • Work notifications: "周五晚上8点项目汇报" (project report Friday 8pm) • Social plans: "下周二一起吃饭" (dinner together next Tuesday) Permissions: • Calendar access: Read and create calendar events • Notification access: Read system notifications to extract time information • Foreground service: Keep service running in background • Exact alarm: Used for crash recovery mechanism • Query packages: Used for app picker to display installed apps This app contains no ads, tracking, or data collection. Target audience: Chinese-speaking users who use Chinese messaging and social apps. Note: Github Release version uses private signing, although both are built automatically by Actions, the signatures of the two packages are different.
F-DroidGitHubIzzyOnDroid
Calendar
APK
The only fully-functional open-source calendar app with Material You.
F-DroidGitHub
C
Calendar Color
APK
A simple app to change the color of a calendar in android 6+. Tested with calendars provided by baikal. Kown Issues: The color is slightly different from what the google calendar app is showing. The google calendar app seems to tweak the colors a little bit. Colors set in owncloud are also slightly different in the google calendar app. The colorchanges back after some time: Many calendar services will overwrite the color when syncing. Set the color directly in the service (e.g. google, owncloud) instead. Thanks: HoloColorPicker - https://github.com/LarsWerkman/HoloColorPicker
F-DroidGitHub
Calendar Import-Export
APK
This app allows you to import/export your calenders using ics files without using Google synchronization services. Features: * Export/Backup to ics file * Import from SD card or server * Supports ics (iCal, iCalendar) files
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
C
Camp 2023
APK
The Chaos Communication Camp is a five-days conference on technology, society and utopia which takes place every four years. The Camp offers lectures and workshops and various events on a multitude of topics including (but not limited to) information technology and generally a critical-creative attitude towards technology and the discussion about the effects of technological advances on society. https://events.ccc.de/camp/2023/ App features * View program by day and rooms (side by side) * Custom grid layout for smartphones (try landscape mode 🙃) and tablets * Read detailed descriptions (speaker names, start time, room name, links, ...) of sessions * Manage sessions in your favorites list * Export your favorites list * Setup individual alarms for sessions * Add sessions to your personal calendar * Share a short text and website link to a sessions * Keep track of program changes * Automatic program updates (configurable in settings) * Integration with the c3nav navigation project https://c3nav.de * Integration with the Engelsystem project https://engelsystem.events.ccc.de - Online tool for coordinating helpers and shifts on large events * Integration with the Chaosflix https://github.com/NiciDieNase/chaosflix - Android app for http://media.ccc.de, share Fahrplan favorites with Chaosflix to import them as bookmarks. (RIP NiciDieNase) 🔤 Supported languages (Event descriptions excluded) * Danish * Dutch * English * Finnish * French * German * Italian * Japanese * Polish * Portuguese * Russian * Spanish * Swedish 💡 Questions regarding the content can only be answered by the content team of the Chaos Communication Camp. This app simply offers a way to consume and personalize the conference schedule. 💣 Bug reports are very welcome. It would be awesome if you can describe how to reproduce the particular error. The issue tracker can be found here: https://github.com/EventFahrplan/EventFahrplan/issues 🎨 Camp design 2023 by Veith Yäger, CC-BY-SA 4.0
F-DroidGitHub
CarVita
APK
✅ Visualize Your Vehicle's Status: A clear dashboard provides an at-a-glance overview of your vehicles and the most urgent upcoming services. ✅ Track Multiple Vehicles: Manage all your cars, motorcycles, or other vehicles in one place. ✅ Create Custom Maintenance Plans: Input your vehicle manufacturer's recommended service schedule (both time and mileage intervals, including first service requirements) to create a plan tailored specifically to your vehicle. ✅ Log Every Service: Keep a detailed digital history of all maintenance performed, including date, mileage, items serviced, costs, and notes. ✅ Get Predictions: Calculates upcoming maintenance tasks for each item in your plan, considering both time and mileage cycles, and even predicts due dates based on your vehicle's usage patterns. ✅ Stay Alert with Reminders: Receive timely local notifications for upcoming services, so you can schedule appointments without stress.
F-DroidGitHub
Casio G-Shock Smart Sync
APK
Casio G-Shock Smart Sync What is it? ----------- This is an unofficial app for Casio G-Shock, Edifice, and Pro Trek watches. It allows you to control your watch, sync data, and configure settings without a Casio ID. It offers a faster, privacy-focused, and more powerful alternative to the official Casio app. Key Features check ------------------ - No Account Required: Skip the Casio ID login entirely. - Calendar Sync: Push your calendar events (Google, Samsung, etc.) to your watch as reminders. - Auto Timezone: Automatically adjusts watch time when you travel. - Remote Control: Use your watch buttons to take photos, control music, or launch voice assistants. - Alarm Sync: Configure watch alarms easily from your phone. - Phone Finder: Trigger a loud alarm on your phone to find it. Supported Watches ----------------- The app works with many Bluetooth-enabled G-Shock, Edifice, and Pro Trek models. - Square: GW-B5600, GMW-B5000, GW-5000, DW-B5600 - CasiOak: GA-B2100, GBM-2100 - G-Steel: GST-B500, GST-B400, GST-B200 - Edifice: ECB-10, ECB-20, ECB-30 - Others: GBD-800, GBD-H1000, GG-B100 Note: While these watches connect, not all specific hardware features (like fitness tracking steps on GBD models) may be fully supported yet. App Walkthrough --------------- 1. Connection Screen This is the first screen you see. It handles the Bluetooth connection to your watch. - Status: Shows generic connection status. - Scan/Connect: Automatically scans for your watch. - Paired Devices: Lists your previously connected watches for quick access. Connection is typically much faster than the official app (~3.5s vs 12s). 2. Time Setting Manage your watch's timekeeping effortlessly. - Local Time: Displays the current time from your phone. - Send to Watch: Tap the button to sync your phone's time, timezone, and DST settings to the watch immediately. - Home Time: Shows the 'Home' city configured on the watch. - Battery: Displays the current battery level of the watch. 3. Alarms Read and configure the alarms stored on your watch. - View Alarms: See the current settings for all 5 alarms and the hourly signal (Chime). - Edit: Tap any alarm to change its time. - Sync: You can send these alarm settings to the watch. 4. Events (Calendar Sync) Sync your phone's calendar to your watch! - Upcoming Events: Lists future events from your phone's calendar. - Send to Watch: Pushes these events to the watch's Reminder feature. - Compatibility: Supports one-time and simple recurring events. Complex recurrence rules might show as "Incompatible". 5. Actions (Remote Control) Turn your watch into a remote control. Assign actions to button presses on the watch. - Find Phone: Make your phone ring loudly. - Take Photo: Snap a picture with your phone's camera. - Next Track: Skip music tracks on your phone. - Voice Assist: Launch Google Assistant. How to use: Short-press the lower-right button on the watch (when in Time mode) to trigger the selected action. 6. Settings Configure app and watch preferences. - Watch Settings: Adjust specific watch configurations (light duration, power saving, etc.). - App Settings: Configure theme, behavior, and advanced options. Where are my World Cities? -------------------------- Using an app to manually swap between Home Time and World Time is a bit silly. Your phone already knows where you are. When setting time, this app will also set the Home Time, Timezone, and DST state to your current location. So when travelling to another timezone, just set time and you are good to go. Build Your Own App ------------------ For those who want to build their own Android app for interfacing with the G-Shock 5000/5600 watches, I have also created an API (library) project here: https://github.com/izivkov/GShockAPI. Similar Project --------------- If you'd prefer not to use a mobile app but still want to set the correct time on your G-Shock, check out this Python project which can run as a server on a PC or Raspberry Pi: https://github.com/iziv
F-DroidGitHub
ChessWatch
APK
Clock for games like chess. It uses time control method. To use, you should provide time for each player as initial time and delay time. After each move the delay time will be added to the remaining time of the player.
F-DroidGitHub
Chibe
APK
In the past, many homes had a chiming or cuckoo's clock, that would make a noise every hour/half hour/quarter hour, Chibe emulates this behaviour in your phone. Instead of making a noise, Chibe vibrates your phone, so that you are reminded of the time, but you don't annoy the people around you. This can be useful during activities, where you want to be reminded of the time, without looking, like sporting or reading, or when you just want to keep better track of your time. Features: * Choose at what interval you would like your phone to vibrate * Choose between multiple vibration patterns, so you won't confuse Chibe with normal notifications. * Create your own vibration patterns * Configure times at which Chibe should be silent, so you won't be annoyed at night. Permissions: * Control vibration: Chibe uses this permission to make your phone vibrate at set intervals. * Run at startup: Chibe uses this, so the you don't need to reenable it every time your phone reboots.
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
Chronofile
APK
Chronofile is a personal time tracking app. More background at this blog post and Hacker News. All data is saved to a chronofile.tsv file on your device. This app is 100% offline and never accesses the internet - no ads, no telemetry, nothing.
GitHubIzzyOnDroid
Chronos
APK
Chronos is a simple, quick, and intuitive alarm clock with many useful features:Custom backgrounds & ringtonesNo unnecessary permissionsDark, Light, AMOLED themesGranular controls everywhereUnique, minimal, efficient designPortrait and landscape orientationCountless default ringtones
GitHubIzzyOnDroid
Clean Timer
APK
I couldn't find a single cube timer app on Google Play that is: a) not ridden with ads b) looks nice So I tried to make one myself! My vision was to implement the features expected of such a timer while staying true to its original purpose, including: - Allowing for 15 seconds of inspection time as per World Cube Association competition ruling - Generating random scrambles - Career statistics: recent/historical averages and ability to manage previous solves - A light/dark theme
F-DroidGitHub
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
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 You
APK
Clock You is a clock and alarm app built with Material Design 3 (You).It supports all the common features such as creating, modifying and scheduling alarms as well as having an inbuilt timer, stopwatch and world clock.Clock You shines when it comes to widgets, it includes multiple modern, material you themed clock widgets.It doesn't have any dependencies apart from the Android base and Material design libraries, therefore the app is very lightweight.
GitHubIzzyOnDroid