# Simple Calendar vs Deco カレンダー

The clearest difference is in-app purchases: Deco カレンダー at none against Simple Calendar's 3. Deco カレンダー also leads on ads (none vs shown) and iOS requirement (14.0 vs 18.0). Simple Calendar's advantage is rating (4.4 vs 4.0) and ratings volume (73 vs 3). On price, update cadence and device support there is nothing between them.

Both are free to download. Simple Calendar sells 3 in-app purchases, starting at $1.99 per month. Deco カレンダー asks for nothing beyond the download.

Simple Calendar holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: Simple Calendar has 73 ratings behind it against 3, so its average is the more settled of the two.

Simple Calendar ships an update every 3 weeks, Deco カレンダー every 5 weeks. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Simple Calendar | Deco カレンダー |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (73 ratings)](https://appshunter.io/ios/app/simple-calendar-widget-cal/id1506434688/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/deco/id1545350571/reviews) |
| Number of ratings | **73** | 3 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 9 MB | 4 MB |
| Requires iOS | 18.0 | **14.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heart Relay Inc.](https://appshunter.io/developer/1327363297) | [Yuichiro Iwase](https://appshunter.io/developer/1498436845) |

## What reviewers say

### Simple Calendar

[App page](https://appshunter.io/ios/app/simple-calendar-widget-cal/id1506434688)

Quickly view your monthly schedule and upcoming events with this easy-to-use calendar app. It offers widget support for at-a-glance access to your day and plans, with all data stored securely on your device. Enjoy a comfortable viewing experience with dark mode support.

**Highlights:** Monthly schedule overview, Quick event registration, Widget support for daily plans, Secure on-device data storage, Dark mode compatibility

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan (Monthly) | $1.99 | per month |
| Premium Plan (Yearly) | $11.99 | per year |
| Hide ads | $11.99 | one-time |


### 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 Simple Calendar free?

Simple Calendar is free to download, with in-app purchases available.

### 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, Simple Calendar or Deco カレンダー?

Simple Calendar is rated higher. Simple Calendar averages 4.4 out of 5 from 73 ratings, while Deco カレンダー averages 4.0 from 3 ratings.

### Do Simple Calendar or Deco カレンダー have ads?

Simple Calendar shows ads; Deco カレンダー does not.

### Which is updated more often, Simple Calendar or Deco カレンダー?

Simple Calendar ships an update every 3 weeks, and Deco カレンダー every 5 weeks. Most recently, Simple Calendar was updated on October 10, 2026 and Deco カレンダー on October 2, 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.*