# KICASignPlus vs USIM스마트인증

The clearest difference is review sentiment: USIM스마트인증 at 83% against KICASignPlus's 8%. KICASignPlus's advantage is update cadence (every 5 weeks vs every 4 months) and device support (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

KICASignPlus ships an update every 5 weeks, USIM스마트인증 every 4 months. The most recent releases landed on September 28, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | KICASignPlus | USIM스마트인증 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.8 (4 ratings)](https://appshunter.io/ios/app/usim/id1288412388/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 8.0% of reviews | **82.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 43 MB | 50 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Korea Information Certificate Authority Inc.](https://appshunter.io/developer/434192206) | [RaonSecure Co., Ltd.](https://appshunter.io/developer/1288412382) |

## What reviewers say

### KICASignPlus

[App page](https://appshunter.io/ios/app/kicasignplus/id434358764)

This app provides electronic signature and PKI-based digital certificate services on iOS smart devices. It allows users to manage digital certificates, perform electronic signatures, and verify identities through a mobile browser, mirroring PC functionalities.

**Highlights:** Digital certificate issuance, renewal, and re-issuance, Import/export of digital certificates, Digital certificate management, Mobile browser-based electronic signatures, Identity verification services

**In-app purchases:** none


### USIM스마트인증

[App page](https://appshunter.io/ios/app/usim/id1288412388)

Securely store your digital certificates on your smartphone, eliminating worries about hacking or leaks. Access your certificates easily for logins and financial transactions anytime, anywhere.

**Highlights:** Secure certificate storage on smartphone, Protection against hacking and leaks, Convenient access for logins and transactions, Portable digital certificate management, Use for year-end tax settlement

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is KICASignPlus free?

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

### Is USIM스마트인증 free?

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

### Do KICASignPlus or USIM스마트인증 have ads?

Neither KICASignPlus nor USIM스마트인증 shows ads.

### Which is updated more often, KICASignPlus or USIM스마트인증?

KICASignPlus ships an update every 5 weeks, and USIM스마트인증 every 4 months. Most recently, KICASignPlus was updated on September 28, 2026 and USIM스마트인증 on September 22, 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.*