# 교대달력 ShiftCalendar vs 휘슬

The clearest difference is rating: 교대달력 ShiftCalendar at 4.6 against 휘슬's 3.0. 교대달력 ShiftCalendar also leads on update cadence (every 2 weeks vs monthly). 휘슬's advantage is ads (none vs shown). On price, review sentiment, ratings volume 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.

교대달력 ShiftCalendar holds the better App Store score, 4.6 against 3.0. Both are backed by a comparable volume of ratings — 5 and 14 respectively. Written reviews complicate that: 67% of 교대달력 ShiftCalendar's written reviews are positive against 70% of 휘슬's, so the app with the better star average is not the one people write more warmly about.

교대달력 ShiftCalendar ships an update every 2 weeks, 휘슬 monthly. The most recent releases landed on June 11, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | 교대달력 ShiftCalendar | 휘슬 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/shiftcalendar/id1010170381/reviews)** | [3.0 (14 ratings)](https://appshunter.io/ios/app/id1552301194/reviews) |
| Number of ratings | 5 | **14** |
| Positive reviews | 66.7% of reviews | **70.2% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Ad-supported | Ad-supported |
| Size | 18 MB | 122 MB |
| Requires iOS | 15.0 | 15 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Park Seung Yun](https://appshunter.io/developer/526364312) | [Monoplatform Co., Ltd.](https://appshunter.io/developer/1552301616) |

## 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


### 휘슬

[App page](https://appshunter.io/ios/app/id1552301194)

This comprehensive car lifestyle platform offers parking violation alerts, vehicle inspection booking, premium car wash reservations, and a reliable used car marketplace. It also features a community forum for drivers and a point system for rewards.

**Highlights:** Parking violation alerts, Vehicle inspection booking, Premium car wash reservations, Used car marketplace, Driver community forum, Point rewards system

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 교대달력 ShiftCalendar free?

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

### Is 휘슬 free?

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

### Which has better reviews, 교대달력 ShiftCalendar or 휘슬?

교대달력 ShiftCalendar is rated higher. 교대달력 ShiftCalendar averages 4.6 out of 5 from 5 ratings, while 휘슬 averages 3.0 from 14 ratings.

### Do 교대달력 ShiftCalendar or 휘슬 have ads?

교대달력 ShiftCalendar shows ads; 휘슬 does not.

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

교대달력 ShiftCalendar ships an update every 2 weeks, and 휘슬 monthly. Most recently, 교대달력 ShiftCalendar was updated on June 11, 2026 and 휘슬 on September 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.*