# Deco カレンダー vs OneClean

The clearest difference is ads: Deco カレンダー at none against OneClean's shown. Deco カレンダー also leads on monetization model (free vs ad-supported). OneClean's advantage is update cadence (every 2 weeks vs every 5 weeks) and rating (4.2 vs 4.0). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

OneClean holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: OneClean has 15 ratings behind it against 3, so its average is the more settled of the two.

Deco カレンダー ships an update every 5 weeks, OneClean every 2 weeks. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Deco カレンダー | OneClean |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/deco/id1545350571/reviews) | **[4.2 (15 ratings)](https://appshunter.io/ios/app/oneclean-storage-cleaner/id1623996351/reviews)** |
| Number of ratings | 3 | **15** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 4 MB | 68 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yuichiro Iwase](https://appshunter.io/developer/1498436845) | [MoboTap Inc.](https://appshunter.io/developer/433626481) |

## What reviewers say

### 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


### OneClean

[App page](https://appshunter.io/ios/app/oneclean-storage-cleaner/id1623996351)

This app helps declutter your phone by removing duplicate photos and videos with just a few taps. It also offers tools to organize your contacts, merging duplicates, backing them up, and removing unnamed entries.

**Highlights:** Delete similar photos and videos, Remove screenshots and Live Photos, Organize contacts, Merge duplicate contacts, Backup contacts, Remove unnamed contacts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Deco カレンダー free?

Deco カレンダー is free to download, with no in-app purchases.

### Is OneClean free?

OneClean is free to download, with no in-app purchases.

### Which has better reviews, Deco カレンダー or OneClean?

OneClean is rated higher. Deco カレンダー averages 4.0 out of 5 from 3 ratings, while OneClean averages 4.2 from 15 ratings.

### Do Deco カレンダー or OneClean have ads?

OneClean shows ads; Deco カレンダー does not.

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

Deco カレンダー ships an update every 5 weeks, and OneClean every 2 weeks. Most recently, Deco カレンダー was updated on October 19, 2026 and OneClean on October 24, 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.*