Don't miss your important appointment.
Put a reminder on your schedule with a set time. The Android app also displays the time remaining until the next meeting.
Reservation notifications are supported by Chromium browser and Android app.YOUR TIME. YOUR RULES.
Make the dayyour own.
From what you have to do to what you want to do.
A free calendar for your day.
01 / BRING IT ALL TOGETHER
The day was scattered,
The moment you find your place.
Work, meetings, and my time. Organize at a glance with cards by date.
BLUE CalendarOctober 2026View multiple days
01THU···
meetingproject kickoff
workDraft your proposal
individuala walk for me
02FRI···
workpriorities for the week
meetingdesign review
individualbook reading time
03SAT···
individuallight stretching
individuallunch date with a friend
worknext week plan
YOUR DAY, IN FOCUS.Today too, at my own pace.
02 / SET IT ONCE
Write it down once.
Next time, and the next time.
Daily exercise, weekly meeting, monthly settlement.
If you set a repeat cycle and day of the week, the schedule will continue.
MON↻05weekly meetingrepeat every week
WED↻07time to exerciserepeat every week
FRI↻09weekly wrap uprepeat every week
MON↻12weekly meetingrepeat every week
WED↻14time to exerciserepeat every week
FRI↻16weekly wrap uprepeat every week
MON↻19weekly meetingrepeat every week
03 / YOUR DAY GOES WITH YOU
wherever you are,
Same my day.
Edit even if the internet is disconnected, and automatically reflected when reconnected.
If you log in with your Google account, your schedule will continue on your PC and phone.
OCTOBER, 2026my week Month Week 3 days
01THUproject kickoffDraft your proposala walk for me
02FRIpriorities for the weekdesign reviewbook reading time
03SATlight stretchinglunch date with a friendnext week plan
Today too, at my own pace.STUDIO PREVIEW
9:41 ▰
MY DAY / OCTOBER
01thursdayToday too, at my own pace.Today's Schedule3
project kickoffDraft your proposala walk for me✓ All schedules are up to date
LESS BUSY. MORE YOU.
As much as I emptied,
It's your time.
Organize your schedule lightly. One day, be a little more like yourself.
All features free, no installation requiredSCROLL TO EXPLORE 0%
03 / YOUR DAY, YOUR COLOR
Because it’s a screen I see every day.
Even my tastes, just like me.
A leisurely draft of a new studio theme.
Tap on the schedule to complete it and change the screen color.
Create your own day with small choices.
BLUE CALENDAR STUDIO PREVIEWNew theme draft
OCTOBER, 2026
my week.
monthmain3 days
Today too, at my own pace.remaining schedule 11
01thursdaytoday···
0/4 complete
Schedule completed0
02fridaytomorrow···
0/4 complete
Schedule completed0
03Saturdayweekend···
0/4 complete
Schedule completed0
My screen, my taste.Compare the studio blueprint with the existing 10 theme colors.
Changes to this screen will not be saved.
Open full demo04 / LITTLE THINGS, BIG DIFFERENCE
A little convenience creates
A light day.
Close to frequently used functions.
Take it out and use it right away when you need it.
Next to the schedule, even the necessary materials.
Keep meeting materials and receipts on your calendar. Just paste or drag and drop, and it will open offline too.
1 of 2 completed · Click to check
Even with just one check, a small sense of accomplishment.
Check off completed tasks and check today's progress. In the actual app, even a check that was pressed incorrectly can be reversed.
The moment you find it, faster.
Search for title, note, and address at once. In the app / Open the search with the key, 1from 4Press until to change views.
05 / EVERYWHERE YOU ARE
Even in front of your desk.
On the go.
Same my day.
Get started right from your browser.
If you like it, you can install it like an app on your home screen.
Installation is possible without logging in.
Google login is required to save the actual schedule and synchronize between devices.
Reviews
Stories from people who wrote it
Please leave comments about what you liked and what you found inconvenient while actually using the BLUE calendar. Your comments will be posted after confirmation and used to determine the order of the next update.
4.6
19 reviews
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Having the time remaining until the next meeting displayed in the top notification bar is much more useful than you might think. I no longer have to waste time doing other things between meetings.
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I decided to use a console theme. Even if I stop for a moment while developing, my eyes don't get tired. However, at first I thought it was a bug that themes were saved separately for each device. I wish you could make the explanation more visible.
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What I like most is that even if you change your schedule on the subway while the signal is out, it will be automatically reflected later. I've never once felt anxious after pressing save.
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exorcism
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While working as a freelancer, I had five or six clients, so the biggest stress was being confused about which projects were due and when. At first, I tried all the popular scheduling apps, but the method of drawing time blocks was rather cumbersome for someone like me who only cares about deadlines. This calendar fits the way I work much better because it stacks cards on top of the dates rather than a timetable. I created categories for each client, divided them by color, and attached the contract and quote PDF directly to the schedule, which drastically reduced the need to search through my mailbox. In particular, the fact that files can be opened offline was helpful when I was out on the road. One thing that is disappointing is that it is inconvenient to not be able to set an end date for the recurring schedule. If you set up weekly meetings for a 3-month project, they will still be there even after the project is over and you will have to delete them one by one. Also, if there are more than four cards in the month view, they appear cut off, but I don't know if this is a screen size issue. Still, I am satisfied with this for free, and I recommend it to freelancers around me.
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Write down how to write. In the morning, I only see what I have to do today in 1-day view. Once finished, click the circle on the right to complete. In the evening, I organize my day by looking at the progress bar. It's simple, but it lasts quite a long time.
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The fact that there are 10 themes is a huge advantage 🎨 I change between Linen during the day and Deep Midnight at night 🌙 Even the fonts and corners change together, so it feels like I'm using a different app.
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There was no burden as I could use it right away without signing up. After using it for a few days and liking it, I logged in.
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I use it for routine management. It's fun to hang it up and check it every day. I like the way that completed items do not disappear but remain in the space below.
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It was crucial to be able to immediately attach a photo of the receipt to the schedule. When you do the month-end settlement, just open that date and everything will appear. Dragging and dropping also works well.
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I was surprised that the month repeat set on the 31st was automatically adjusted to the last day in February. In other apps, I've missed deadlines by just skipping them. I decided to continue writing about this one detail.
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I rarely use the mouse because the combination of opening the search with the slash and changing the view with 1~4 is at my fingertips. It's also nice to be able to search for notes and repetition rules.
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I intentionally register small tasks to see my daily completion rate increase. I don't know if it was intentional, but it works for me.
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This is the first time I've seen a calendar that uses Ctrl+Z when you accidentally press Done. The undo button that appears below immediately after deletion was also useful. However, I was confused because I didn't know that the records were cleared when synced from another device.
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Claims are divided into red and personal information is divided into green, so you can see the picture of the month at a glance. It's nice to be able to change the category name and color directly.
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Korean public holidays are displayed in the month view, making it convenient when planning annual leave. It would be nice to go in early for 2027 as well.
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I clicked on the address bar icon to open it in a separate window and pinned it to the taskbar. No more searching for calendars between tabs. Notifications also come well here.
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It looks much better when I turn on the entire card color option. The basics were a bit boring, but after turning it on, my satisfaction level increased significantly. Just a notification would be perfect.
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I use the multi-day view the most. Since you can see the four days side by side on your desktop, it's easy to move what you didn't finish today to the day after tomorrow. Dragging and dropping is also smooth.
BLUE CALENDAR / INTRODUCTION
See it in action
Explore the key features and how to use them.
06 / GOOD TO KNOW
Before you start,
Things I'm curious about.
Functions and scope of support
We will guide you honestly.
01Is BLUE Calendar free?＋
yes. It's free to use on the web and there are no paid plans or feature restrictions. The demo opens immediately without logging in.
02Can I use it without registering?＋
The demo opens without registration or login. To actually save your schedule, you need to log in to your Google account. This is because if you want to continue the same schedule across devices, you need to save it based on your account.
03Are the schedules and themes changed in the demo saved?＋
no. The demo only works in browser tab memory. They are not stored in the database and return to the ready example state when you refresh or leave the page.
04Can I use it directly in the browser without installation?＋
yes. Just open the address and write it right away. It runs on the latest versions of Chrome, Edge, Safari, and Firefox, and the view changes to suit PC and mobile screens.
05Can I install it like an app on the home screen?＋
You can install it as a PWA. For PC Chrome and Edge, click the install icon on the right side of the address bar, for Android Chrome, click the install app in the menu, and for iPhone Safari, click the add to home screen button on the share button. Once installed, it opens in full screen without an address bar.
06Is there also an Android app?＋
There is an Android app that directly downloads and installs the APK. It is not posted on the Play Store. If you use the app, you will receive an accurate alarm and the time remaining until the next meeting will be displayed in the top notification bar.
07What environment do calendar notifications come from?＋
On the web, reservation notifications work in Chromium-based browsers, namely Android Chrome and PC Chrome and Edge. The Android app sounds more accurately as a system alarm. iPhone Safari and Firefox do not support reservation notifications. This is because it is structured to schedule only within the device without having a notification server.
08Can I set a time for the notification to sound?＋
You can choose from 1 day in advance, 2 hours in advance, 1 hour in advance, 30 minutes in advance, or 10 minutes in advance for a schedule with a set time, and you can also set multiple times together. The meeting category is turned on 1 day ago by default. Notifications will not be sent for events without a time.
09Can I create a daily, weekly, or monthly recurring schedule?＋
It supports daily, weekly, monthly, and yearly repetitions, and can also specify intervals such as every two weeks. For weekly repetition, you can select multiple days of the week, such as Monday, Wednesday, and Friday. Monthly repeats set on the 31st will automatically appear on the last day in short months like February.
10Can I set an end date for a recurring schedule or remove specific episodes?＋
There is no end date and number of repetitions specified yet. Rules such as the third Friday of every month are also not supported. If you drag and drop a repeating schedule to another day, only that session will be separated, and if you change it in the edit window, it will be applied to all sessions together.
11Even if the internet is cut off, can I view and fix my schedule?＋
Not only viewing but also adding, editing, and deleting can be done offline. Changes made while disconnected are stored in a queue on the device and automatically reflected when the connection is restored, with the synchronization status and queue count displayed above the screen. Attachments also open offline.
12Are the schedules on my phone and PC automatically synchronized?＋
When you sign in with your Google account, your schedule, completion notes, and attachments will sync between your devices. However, themes, category lists, notes, and week start days are saved separately for each device and are not synchronized.
13Can I import or export Google Calendar events?＋
You can import it. After logging in, you can transfer schedules from Google or Naver calendar at once. Google selects accounts and calendars and imports them as read-only, usable only on the PC web, and in Android apps as ICS files. Naver imports it as an ICS file. Export and continued integration with Google and Naver calendars are not supported.
14Can I share my calendar with my family or team?＋
no. It is a personal calendar, so there are no sharing or invitation functions. Schedules are stored completely separate by account.
15Can I attach files to my schedule?＋
It works. Photos are automatically reduced in size, and general files such as PDF can be uploaded up to 20MB each. Paste and drag-and-drop are supported, and uploaded files can be opened offline.
16Where is my calendar data stored and can anyone see it?＋
A logged in user's schedule is stored in a separate storage space for each account and can only be read by that account. Schedules, completion records, and attachments are stored in Google Firebase's Firestore. If you delete a schedule, contents such as the title and notes will be blank and only a mark will remain indicating the deletion to other devices. If you delete an attached file, the file body will also be deleted. Demo schedules are never stored and are completely separate from actual user data.
17What information is sent to the server regarding usage status?＋
Once a day from the logged-in device, account identification, email, name, device identification, installation type (browser, home screen app, Android app), operating system type, and time zone are sent to the operation server (bluetraffic.kr) to tally usage status. This does not include event content, such as event titles or notes. It is not sent in demos that are opened without logging in.
BLUE CALENDAR
Today, a little more
Write it as yourself.
A preview of my day Try without logging in · All functions are free