# 휘슬 vs 에스원 모두(MoDU)

The clearest difference is review sentiment: 휘슬 at 71% against 에스원 모두(MoDU)'s 13%. 에스원 모두(MoDU)'s advantage is monetization model (free vs ad-supported) and iOS requirement (13.0 vs 15). On price, update cadence, 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.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 19, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | 휘슬 | 에스원 모두(MoDU) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (14 ratings)](https://appshunter.io/ios/app/id1552301194/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | **70.7% of reviews** | 13.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Ad-supported | **Free** |
| Size | 128 MB | 220 MB |
| Requires iOS | 15 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Monoplatform Co., Ltd.](https://appshunter.io/developer/1552301616) | [S1 Corporation](https://appshunter.io/developer/352726008) |

## What reviewers say

### 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


### 에스원 모두(MoDU)

[App page](https://appshunter.io/ios/app/modu/id6451223244)

Manage your S1 security service contracts, view video feeds, and remotely control security systems. This app allows direct application and setup for various software services.

**Highlights:** Contract information lookup, Remote security system control, Video feed viewing, Software service application, Service setup and configuration

**In-app purchases:** none


## Frequently asked questions

### Is 휘슬 free?

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

### Is 에스원 모두(MoDU) free?

에스원 모두(MoDU) is free to download, with no in-app purchases.

### Do 휘슬 or 에스원 모두(MoDU) have ads?

Neither 휘슬 nor 에스원 모두(MoDU) shows ads.

### Which is updated more often, 휘슬 or 에스원 모두(MoDU)?

휘슬 ships an update monthly, and 에스원 모두(MoDU) monthly. Most recently, 휘슬 was updated on October 19, 2026 and 에스원 모두(MoDU) on October 23, 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.*