# 교대달력 ShiftCalendar vs 쓰리오프

The clearest difference is review sentiment: 교대달력 ShiftCalendar at 67% against 쓰리오프's 24%. 교대달력 ShiftCalendar also leads on in-app purchases (none vs 10). 쓰리오프's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. 쓰리오프 sells 10 one-off in-app purchases. 교대달력 ShiftCalendar asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | 교대달력 ShiftCalendar | 쓰리오프 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/shiftcalendar/id1010170381/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | **66.7% of reviews** | 23.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 18 MB | 152 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Park Seung Yun](https://appshunter.io/developer/526364312) | [Tae Hyun IM](https://appshunter.io/developer/1549490049) |

## What reviewers say

### 교대달력 ShiftCalendar

[App page](https://appshunter.io/ios/app/shiftcalendar/id1010170381)

Manage your rotating work schedule with this calendar app. It allows for custom work types, displays lunar dates and holidays, and tracks accumulated overtime. Over 1000 companies are already registered.

**Highlights:** Customizable shift schedules, Lunar calendar and holidays, Overtime tracking, Company registration, Personalized work types

**Features:** macOS Compatibility

**In-app purchases:** none


### 쓰리오프

[App page](https://appshunter.io/ios/app/id1549490047)

This app helps nurses manage their work schedules and personal time with a visually appealing calendar. It offers features like duty sharing, group chat, community forums, and job postings, aiming to improve work-life balance for healthcare professionals.

**Highlights:** Visually appealing calendar design with stickers and color coding, Simple duty and schedule customization, Compare multiple users' duty schedules, Anonymous community forums, webtoons, and job postings, 1:1 and group chat with duty sharing, Salary calculator and store features

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 컬러테마 구매 | $0.99 | one-time |
| 스티커 구매 | $1.99 | one-time |
| 스티커 level4 | $3.99 | one-time |
| 스티커 level5 | $4.99 | one-time |
| 어플리케이션 화면에 표시된광고를 제거합니다. | $4.99 | one-time |
| 스티커 level6 | $5.99 | one-time |
| 스티커 level7 | $6.99 | one-time |
| 스티커 level8 | $7.99 | one-time |
| 스티커 level9 | $8.99 | one-time |
| 스티커 level10 | $9.99 | one-time |


## Frequently asked questions

### Is 교대달력 ShiftCalendar free?

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

### Is 쓰리오프 free?

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

### Do 교대달력 ShiftCalendar or 쓰리오프 have ads?

교대달력 ShiftCalendar shows ads; 쓰리오프 does not.

### Which is updated more often, 교대달력 ShiftCalendar or 쓰리오프?

교대달력 ShiftCalendar ships an update every 2 weeks, and 쓰리오프 every 2 weeks. Most recently, 교대달력 ShiftCalendar was updated on October 24, 2026 and 쓰리오프 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.*