# 에스원 M서비스 vs DefendPlus

The clearest difference is update cadence: DefendPlus at every 4 days against 에스원 M서비스's every 45 months. 에스원 M서비스's advantage is iOS requirement (12.0 vs 16). On price, ads, in-app purchases and device support there is nothing between them.

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

에스원 M서비스 ships an update every 45 months, DefendPlus every 4 days. The most recent releases landed on August 17, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | 에스원 M서비스 | DefendPlus |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 15.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 1 MB | 5 MB |
| Requires iOS | **12.0** | 16 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [S1 Corporation](https://appshunter.io/developer/352726008) | [ATON Inc.](https://appshunter.io/developer/359338184) |

## What reviewers say

### 에스원 M서비스

[App page](https://appshunter.io/ios/app/m/id785309363)

This service allows S1 Finance subscribers to check their security system's arming and disarming status. It provides a convenient way to monitor your security remotely.

**Highlights:** View arming status, View disarming status, S1 Finance subscriber service, Remote security monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


### DefendPlus

[App page](https://appshunter.io/ios/app/defendplus/id6757997218)

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

**In-app purchases:** none


## Frequently asked questions

### Is 에스원 M서비스 free?

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

### Is DefendPlus free?

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

### Do 에스원 M서비스 or DefendPlus have ads?

Neither 에스원 M서비스 nor DefendPlus shows ads.

### Which is updated more often, 에스원 M서비스 or DefendPlus?

에스원 M서비스 ships an update every 45 months, and DefendPlus every 4 days. Most recently, 에스원 M서비스 was updated on August 17, 2026 and DefendPlus on September 14, 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.*