Cal2Todo
Cal2Todo is #30 in Business Paid in Japan and charting in 1 of 24 countries we track.
Updated 28 Sep 2026 · rankings refresh through the day
DeveloperYasuko Shikiuchi
CategoryBusiness
Price150 JPY
Released
Rating★ 4.6 (126)
Version5.6.20
Age rating4+
First seen by us
25 Sep 2026
Installs (est.)5k+ worldwide
Rating
4.6 ★
126 ratings
Measured
Best rank now
#30
Measured
Cal2Todo on the App Store
App details
App ID
475987733
Publisher
Yasuko Shikiuchi
On the store since
Nov 2011
14 years on the store
Minimum OS
iOS 13.0+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
2
EN JA
Size
41 MB
Also listed in
Productivity
Cal2Todo downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where Cal2Todo's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 24 countries.
| Country | Charts | Rank |
|---|---|---|
| BusinessPaid | #30 |
Apps near Cal2Todo on the chart
Business Paid, around #30.
Ratings
App Store, worldwide.
Rating
4.6 ★
126 ratings
Measured
Ratings
126
Measured
About Cal2Todo
THINK-OUT-OF-THE-BOX Calendar app - PROCRASTINATION MADE EASY!
-Your EVENTS now appear as your TASKS.
-You will never forget your appointments using this app.
-You can push tasks back later.
-It has an Intuitive design allowing you to quickly look at the day's agenda.
-You can use Google calendar as well, if your built-in calendar is synced with Google calendar.
Who will benefit most from this app?
-Users who want only one integrated app to control their schedules rather than two separate apps (scheduler and todos).
-Users who usually procrastinate and sometimes forget to do things.
-Users who want to finish everything before going to bed.
Convenient 4-day view
-Fully compatible with the built-in iPhone calendar.
-You access your recent appointments by tapping the buttons at the bottom of the screen.
-Can display a count-down timer for your next appointment or event.
-Colorful screen - pick different colors for different calendars
Basic usage
-Home screen has today's agenda.
-When you finish events, you check them off. Once checked, it goes into the background.
-Items in red are overdue. Items in yellow are upcoming appointments (Less than an hour)
-Most importantly, when you realize that you do not have time to do something, hit PROCRASTINATE. Don't worry, It will come back in a couple of days!!
Items can be deffered from 15 mins to 2 weeks. These settings are fully customizable.
- Today update the date as of today
- Tomorrow update the date as of tomorrow
- Next week update the date as the same day next week
- Morning update the time for the next few mornings.
- Afternoon update the time for the next few afternoons.
- Evening update the time for the next few evenings.
- 1hr later push back 1hr
- 3hrs later push back 3hrs
- 5hrs later push back 5hrs
- and more!
Miscellaneous
-The button on the top-left of your screen will toggle items to be visible/invisible.
-You can edit your items on this app and the changes will appear on the original built-in calendar.
-You can delete items by swiping & tapping.
-You can select the calendar(s) of your choice.
Note:
-This calendar only focuses on the next four days (yesterday, today, tomorrow, and the day after tomorrow)
-The app retains the "Check ON/OFF" data by tagging the item with an ID. Some apps might change this ID. If that is the case, Cal2todo might not work properly.
-This app only communicates with the database when it starts, therefore, the icon badge will not be updated until you open Cal2todo.
-Your EVENTS now appear as your TASKS.
-You will never forget your appointments using this app.
-You can push tasks back later.
-It has an Intuitive design allowing you to quickly look at the day's agenda.
-You can use Google calendar as well, if your built-in calendar is synced with Google calendar.
Who will benefit most from this app?
-Users who want only one integrated app to control their schedules rather than two separate apps (scheduler and todos).
-Users who usually procrastinate and sometimes forget to do things.
-Users who want to finish everything before going to bed.
Convenient 4-day view
-Fully compatible with the built-in iPhone calendar.
-You access your recent appointments by tapping the buttons at the bottom of the screen.
-Can display a count-down timer for your next appointment or event.
-Colorful screen - pick different colors for different calendars
Basic usage
-Home screen has today's agenda.
-When you finish events, you check them off. Once checked, it goes into the background.
-Items in red are overdue. Items in yellow are upcoming appointments (Less than an hour)
-Most importantly, when you realize that you do not have time to do something, hit PROCRASTINATE. Don't worry, It will come back in a couple of days!!
Items can be deffered from 15 mins to 2 weeks. These settings are fully customizable.
- Today update the date as of today
- Tomorrow update the date as of tomorrow
- Next week update the date as the same day next week
- Morning update the time for the next few mornings.
- Afternoon update the time for the next few afternoons.
- Evening update the time for the next few evenings.
- 1hr later push back 1hr
- 3hrs later push back 3hrs
- 5hrs later push back 5hrs
- and more!
Miscellaneous
-The button on the top-left of your screen will toggle items to be visible/invisible.
-You can edit your items on this app and the changes will appear on the original built-in calendar.
-You can delete items by swiping & tapping.
-You can select the calendar(s) of your choice.
Note:
-This calendar only focuses on the next four days (yesterday, today, tomorrow, and the day after tomorrow)
-The app retains the "Check ON/OFF" data by tagging the item with an ID. Some apps might change this ID. If that is the case, Cal2todo might not work properly.
-This app only communicates with the database when it starts, therefore, the icon badge will not be updated until you open Cal2todo.
Latest updates
5.6.20
fixed bugs
iOS18 build