Red Calendar 2026
Red Calendar 2026 Summary
Red Calendar 2026 is a free, ad-supported, with in-app purchases iOS app in Productivity by jaesung Lee. Released in Dec 2019 (6 years ago). It has 43.6K ratings with a 4.73★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 115.8K monthly active users and generates around $10K+ monthly revenue (24% IAP / 76% ads). Store last updated Jun 18, 2026
Recent activity: 3.00 new ratings this week View trends →
SDK intelligence: AppGoblin detected 4 development tools(e.g. ReactiveX), 3 ad networks,and 1 analytics: product integrated into Red Calendar 2026. View full SDK list →
Red Calendar 2026 SDKs Summary
Red Calendar 2026 was last scanned for SDKs on 2026-07-01. Below is the overview of third-party companies detected in the app. The full list of SDKs, permissions and unknowns is available here.
Facebook
AdMob
Google
ReactiveX
nanopb
MongoDB
Firebase4.73★
Ratings: 43.6K
Screenshots
App Description
• 40k reviews / Rating 4.7
• 500k cumulative downloads
The Easiest Calendar App for Logging Events: "Red Calendar"
An intuitive calendar app where you can easily see public holidays.
"Red Calendar" - See Red Days at a Glance
The simplest calendar app in the world, "Red Calendar"
• Tap a date once to quickly save the simplest event
• Long press a date to access a variety of event options
• Save recurring events monthly or yearly
• View red days at a glance with the annual calendar
• Set your background image to match your taste
• Save your calendar as an image and set it as your phone background
• Supports dark mode and widgets
• Supports calendars from various countries with public holidays
• Support for various global holiday calendars
1. Truly Simple Event Registration: Now you can skip complicated times and notifications when adding an event! Simply tap a date to add a quick event or memo. For continuous events like vacations, long press to add them
2. Even Simpler Event Options: Long press a date to change the color of your event. Want to emphasize a specific event? Use the highlight feature! For recurring events like birthdays, anniversaries, or payday, use the repeat event feature
3. Annual Calendar: Wondering when the red days are this year? Don’t check month by month—just tap the annual calendar button in the top left corner of the app
4. Supports Dark Mode and Widgets: View your calendar in dark mode to avoid straining your eyes. Of course, you can always set it to dark or light mode, regardless of system settings. Check out the newly added widgets as well
5. See Red Days at a Glance: Quickly check public holidays and substitute holidays. Use the annual calendar to instantly see when the days off are throughout the year. Curious about holidays abroad? Explore and stay updated with a wide variety of international holidays we support.
Please leave a rating and share any features you’d like to see or any issues you’ve encountered in your review. The developer personally checks them and will leave a reply :D
Thank you for using Red Calendar!
Red Calendar Pro Version: Remove the bottom ads to use the calendar more freely
Red Calendar is a free app that offers a variety of features to make the easiest calendar app possible. For those who want a more powerful experience and a happier day or month,