Comparison

Calendar app *DeepBlack vs Deco カレンダー

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calendar app *DeepBlack

Organize your schedule with a simple calendar, time, and to-do list. Add tasks and appointments with a touch, and visually distinguish events using customizable color-coding. This app offers a private way to manage your plans without needing to register.

Highlights
  • Daily task and appointment list
  • Color-coded event decoration
  • Customizable schedule creation
  • Private, device-saved plans
  • Simple touch interface
Features
Read full description

Appointment book use as casual note. Organized plan in Calendar and Time and To-do list. Feature Overview Details [touch +] "Task" or "Appointment" added to "daily task list" [touch x] "Task" or "Appointment" deleted from "daily task list" [touch color bar] Calendar decorated by color Providing scheduling solutions in a few touch. Customization Calendar marks up by color that selected suitable for this calendar to define special event days. Appointment book app even not defined holiday according to the ordinary calendar. Can create schedule suite for your lifestyle. Also recommend to people that don't rest Saturday and Sunday. About appointment and task list date No need to register. You're secretly appointment or task list saved your device.

About

Deco カレンダー

Personalize your calendar with a variety of stylish wallpapers and themes. Easily manage your schedule with standard calendar functions, including adding, editing, and sharing events. Syncs with iCloud and Google Calendar for seamless integration.

Highlights
  • Customizable image and movie wallpapers
  • Date label font and size options
  • Add, edit, and remove schedules
  • Schedule sharing via mail and SNS
  • Integrated map function
  • Sync with iCloud and Google Calendar
Features
Read full description

Funny Calendar App, "Deco Calendar". Let us decorate calendar to choose your favorite wallpapers! You can choose Cute, Stylish, Simple, and Seasonal wallpapers. Of course, this app is implemented standard functions as Calendar app. # Original Twelve Wallpapers with 12 Months Mainly, wallpapers are designed by several creator's works,both images and movies. You can have a enjoyable experience by swiping through the calendar! You can choose calendar wallpaper templates at the "Deco Store", and you can get free. # Easy to Look as a Calendar. Care Accessibility; You can set calendar's font size and font style. If you have any plans for one day, you can find this schedule by dotted calendar-date label. Dots above the calendar-date label is colored with categorized events, like business or family. #Simply and Useful You can add, edit and delete schedules by tapping date-label. Incorporated interface iOS Standard Calendar App, you can operate familiar to edit schedule. And implemented map function, you can find a place to meet quickly not using map apps. # Sync with iOS Calendar You can sync schedules with your iCould account, and working on other calendars & schedule apps. Even though you uninstall this app, your schedule can be referred by iOS Calendar App and other app. And if you have Google Account, you can sync your schedule with Google Calendar. # Share your Schedule This app is incorporated sharing your schedule via mail, SNS Message, you can share schedule to your family, friend and partner. #Functions of this app - Choice the image and movie wallpapers. - Getting your favorite wallpaper - Choice the date-label fonts - Choice the font size of the date-label (Small / Mid / Large) - Addition, changing, removing the schedule. - Sharing schedules - Display the map - Sync with the iCould and Google Calendar

Screenshots

Calendar app *DeepBlack4 screens
Deco カレンダー4 screens

Verdict

The call

The clearest difference is rating: Calendar app *DeepBlack at 4.5 against Deco カレンダー's 4.0. Calendar app *DeepBlack also leads on iOS requirement (11.0 vs 14.0). Deco カレンダー's advantage is update cadence (every 5 weeks vs every 5 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Calendar app *DeepBlack holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

UpkeepUpdate frequency

Calendar app *DeepBlack ships an update every 5 months, Deco カレンダー every 5 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 6 level
Calendar app *DeepBlack versus Deco カレンダー: the parameters behind the verdict, then further details
ParameterCalendar app *DeepBlackDeco カレンダー
PriceFreeFree
Rating4.5 (2 ratings) — better4.0 (3 ratings)
Number of ratings23 — better
Update frequencyEvery 5 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS11.0 — better14.0
Further details — not scored
Size10 MB4 MB
Age rating17+4+
DeveloperBakerstreet Co., Ltd.Yuichiro Iwase

Customer experience

Calendar app *DeepBlack

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Deco カレンダー

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Calendar app *DeepBlack

No in-app purchases

None

Deco カレンダー

No in-app purchases

Questions

Is Calendar app *DeepBlack free?
Calendar app *DeepBlack is free to download, with no in-app purchases.
Is Deco カレンダー free?
Deco カレンダー is free to download, with no in-app purchases.
Which has better reviews, Calendar app *DeepBlack or Deco カレンダー?
Calendar app *DeepBlack is rated higher. Calendar app *DeepBlack averages 4.5 out of 5 from 2 ratings, while Deco カレンダー averages 4.0 from 3 ratings.
Do Calendar app *DeepBlack or Deco カレンダー have ads?
Neither Calendar app *DeepBlack nor Deco カレンダー shows ads.
Which is updated more often, Calendar app *DeepBlack or Deco カレンダー?
Calendar app *DeepBlack ships an update every 5 months, and Deco カレンダー every 5 weeks. Most recently, Calendar app *DeepBlack was updated on November 2, 2026 and Deco カレンダー on November 3, 2026.

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