# 모비싸인(MobiSign) vs SGI M(SGI서울보증)

The clearest difference is rating: SGI M(SGI서울보증) at 2.6 against 모비싸인(MobiSign)'s 1.0. SGI M(SGI서울보증) also leads on review sentiment (52% vs 14%) and in-app purchases (none vs 1). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. 모비싸인(MobiSign) sells 1 in-app purchase, starting at $0.99 per month. SGI M(SGI서울보증) asks for nothing beyond the download.

SGI M(SGI서울보증) holds the better App Store score, 2.6 against 1.0. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews point the same way: 14% of 모비싸인(MobiSign)'s written reviews are positive against 52% of SGI M(SGI서울보증)'s.

모비싸인(MobiSign) ships an update every 5 months, SGI M(SGI서울보증) every 2 months. The most recent releases landed on October 8, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | 모비싸인(MobiSign) | SGI M(SGI서울보증) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/mobisign/id510264761/reviews) | **[2.6 (5 ratings)](https://appshunter.io/ios/app/sgi-msgi/id6443694425/reviews)** |
| Number of ratings | 2 | **5** |
| Positive reviews | 14.3% of reviews | **52.2% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 46 MB | 80 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [금융결제원 (KFTC)](https://appshunter.io/developer/666154467) | [SGI서울보증](https://appshunter.io/developer/638584684) |

## What reviewers say

### 모비싸인(MobiSign)

[App page](https://appshunter.io/ios/app/mobisign/id510264761)

This service allows you to electronically sign documents using your smartphone's digital certificate. It securely stores your certificate and enables signing on PCs through various financial and public services. Enjoy enhanced security and portability for your digital transactions.

**Highlights:** Use smartphone digital certificate on PC, Securely store digital certificates, Electronic signing via smartphone, Convenient certificate copying (QR, code), Compatible with banking, shopping, public services

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MobiSign Monthly Subscription | $0.99 | per month |


### SGI M(SGI서울보증)

[App page](https://appshunter.io/ios/app/sgi-msgi/id6443694425)

Manage your insurance contracts conveniently from your smartphone. Offers secure login options and electronic signing for various services, including new online-exclusive product sales. Contact customer service for assistance.

**Highlights:** Insurance contract management, Secure login via financial certificate or phone verification, Quick login with Kakao/Naver, Electronic signing with various certificates, New online-exclusive product sales

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

**In-app purchases:** none


## Frequently asked questions

### Is 모비싸인(MobiSign) free?

모비싸인(MobiSign) is free to download, with in-app purchases available.

### Is SGI M(SGI서울보증) free?

SGI M(SGI서울보증) is free to download, with no in-app purchases.

### Which has better reviews, 모비싸인(MobiSign) or SGI M(SGI서울보증)?

SGI M(SGI서울보증) is rated higher. 모비싸인(MobiSign) averages 1.0 out of 5 from 2 ratings, while SGI M(SGI서울보증) averages 2.6 from 5 ratings.

### Do 모비싸인(MobiSign) or SGI M(SGI서울보증) have ads?

Neither 모비싸인(MobiSign) nor SGI M(SGI서울보증) shows ads.

### Which is updated more often, 모비싸인(MobiSign) or SGI M(SGI서울보증)?

모비싸인(MobiSign) ships an update every 5 months, and SGI M(SGI서울보증) every 2 months. Most recently, 모비싸인(MobiSign) was updated on October 8, 2026 and SGI M(SGI서울보증) on October 21, 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.*