# Calendar app *DeepBlack vs Deco カレンダー

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.

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

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.

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.

## The numbers

| Metric | Calendar app *DeepBlack | Deco カレンダー |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/calendar-app-deepblack/id1115009429/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/deco/id1545350571/reviews) |
| Number of ratings | 2 | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 10 MB | 4 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Bakerstreet Co., Ltd.](https://appshunter.io/developer/1090599145) | [Yuichiro Iwase](https://appshunter.io/developer/1498436845) |

## What reviewers say

### Calendar app *DeepBlack

[App page](https://appshunter.io/ios/app/calendar-app-deepblack/id1115009429)

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:** macOS Compatibility

**In-app purchases:** none


### Deco カレンダー

[App page](https://appshunter.io/ios/app/deco/id1545350571)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*