Check Calendar - Habit Tracker
Check Calendar - Habit Tracker is made and published by Naoki Otsu. AppBrain is an independent app data site and isn't affiliated with Naoki Otsu. The app name, icon, screenshots and description belong to Naoki Otsu and are shown as published on Google Play.
AppBrain's verdict
EstablishedWell rated- Total installs
- 700 thousand
- Rating on Google Play
- 4.42
- 12,605 ratings
- Last updated
- October 27, 2026
Check Calendar - Habit Tracker has 700 thousand installs. Users rate it well: 4.4 stars from 12,605 ratings.
Installs
Tracked by AppBrain- Last 30 days
- 15 thousand
- Per day
- 510
- 30-day average
- Play install range
- 500+ thousand
- Launched
- August 2021
Installs over time
Check Calendar - Habit Tracker has been installed 700 thousand times. Over the past 30 days, it averaged 510 installs per day.
Rankings
Google Play top chartsGoogle Play Rankings for Check Calendar - Habit Tracker
Competitors
Similar apps and more from Naoki OtsuAlternatives to Check Calendar - Habit Tracker
More from Naoki Otsu
Releases
Updates seen on Google Play- Version
- 14.53.1
- Launched
- August 2021
User feedback
Ratings and reviews on Google PlayGoogle Play Rating history and histogram
Comments on Check Calendar - Habit Tracker for Android
Technology
Found in the app by AppBrain- Ads
- Contains ads
- Price
- Free
- Libraries
- 49
- App size
- 64.5 MB
- Needs Android
- 5.0+
- Content rating
- Everyone
Technologies used by Check Calendar - Habit Tracker
About the app and developer
About Check Calendar - Habit Tracker
Check Calendar - Habit Tracker is a productivity app developed by Naoki Otsu.
Install Statistics
Check Calendar - Habit Tracker has been installed 700 thousand times. In the last 30 days, the app was installed 15 thousand times.
User Ratings
Check Calendar - Habit Tracker is rated 4.42 out of 5 stars. The rating is based on 13 thousand ratings.
App Information
Check Calendar - Habit Tracker is freely available from Google Play. The app size is 64.53 MB. The latest version available is 14.53.1. The last update was on October 27, 2026.
Technical Requirements
Check Calendar - Habit Tracker requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since August 2021.
App Performance Report
Get a detailed PDF report for Check Calendar - Habit Tracker with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more
Get PDF Report — $29Developer information for Naoki Otsu
Frequently asked questions about Check Calendar - Habit Tracker
Is Check Calendar - Habit Tracker free?
Yes. Check Calendar - Habit Tracker is free on Google Play.
Is Check Calendar - Habit Tracker still available?
Yes. Check Calendar - Habit Tracker is on Google Play, and the last update we saw was on October 27, 2026.
Does Check Calendar - Habit Tracker contain ads?
Yes. Google Play lists Check Calendar - Habit Tracker as containing ads.
What Android version does Check Calendar - Habit Tracker require?
Check Calendar - Habit Tracker runs on Android 5.0 and higher.
How large is Check Calendar - Habit Tracker?
Check Calendar - Habit Tracker is 64.53 MB.
Is Check Calendar - Habit Tracker suitable for children?
Google Play rates the content of Check Calendar - Habit Tracker as suitable for everyone.
How many times has Check Calendar - Habit Tracker been installed?
Google Play lists 500,000+ installs for Check Calendar - Habit Tracker.
How do people rate Check Calendar - Habit Tracker?
Check Calendar - Habit Tracker scores 4.42 out of 5 stars, from 12,605 ratings on Google Play.
Who made Check Calendar - Habit Tracker?
Check Calendar - Habit Tracker was developed by Naoki Otsu. It is listed in the productivity category on Google Play.
What are the best alternatives to Check Calendar - Habit Tracker?
People looking at Check Calendar - Habit Tracker also look at these productivity apps: Zenboard : Habit and Money, Dot Habit - Tracker In Dot, Goal Tracker & Habit Calendar, Pixel Habit Tracker, Habit Tracker Unlimited.
Store listing
By Naoki Otsu, from Google Play“Habit tracker to record habits by checking the calendar. Tabs, graphs and more”
Description by Naoki Otsu Written by the developer, not by AppBrain. Click to read.
It's packed with features like one-tap check-offs, notes, unlimited tabs, emojis, reports, notifications, backup & restore, widgets, dark mode, and more.
■ Check off on the calendar
Track your habits by checking them off on the calendar with a single tap.
■ Notes
Supports both short and long notes! Write freely to keep your records.
■ Unlimited tabs
Create unlimited categories like "Workout," "Study," and "Reading."
■ Emojis
Change your checkmark to any emoji you like.
■ Checkmark color
Change your checkmark to any color you like.
■ Reports
Visualize your habit progress with graphs. You can freely change the time range, such as "Last 7 days," "Last 28 days," or "Last 6 months."
■ History
View your check-off history, a list of past notes, and more.
■ Notifications
Send notifications at any time with any message you choose. Use them so you never forget your habits.
■ Backup / Restore
Automatically back up and restore your data. You can transfer your data even across different devices.
■ Widget
Check off on the calendar and view your totals right from the widget, without opening the app.
You can also use the report widget to quickly check your cumulative, this month, and last month check-off counts.
■ Dark mode
Choose your theme from "Light mode," "Dark mode," or "Switch automatically based on device settings."
■ Color theme
Change the background color to any color you like.
■ Archive
Hide calendars you don't want to see by archiving them.
■ Biometric authentication
Supports Face ID and Touch ID. Keep your important records safe and secure.
■ CSV export
Export an individual calendar or all of your data in CSV format.
■ Check count
Freely set how many times you can check off per day.
■ Security
Your data is stored only on your device. It is never sent to third parties.
■ No login required
Start using the app right away without signing in.
■ Offline support
Works even without an internet connection.
■ Privacy Policy
https://checkcalendar.app/privacy-policy
■ Contact
If you have any requests or questions, please feel free to reach out through the in-app contact form or via the email address below.
info@checkcalendar.app
Recent changes:
- The latest version includes new features, bug fixes, and performance improvements.
Thank you for always using our app.
We will continue to develop it with the valuable feedback from everyone.
If you have any requests or encounter any issues, please feel free to contact us through "Send Feedback" in the app settings or at info@naokiotsu.com.