# 디지털OTP vs USIM스마트인증

디지털OTP and USIM스마트인증 both sit at 1.6 stars, but that hides the real split: 83% of USIM스마트인증's written reviews are positive against 2% of 디지털OTP's. 디지털OTP's advantage is iOS requirement (9.0 vs 16.0). On price, rating, ratings volume and update cadence there is nothing between them.

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

USIM스마트인증 holds the better App Store score, 1.8 against 1.6. Both are backed by a comparable volume of ratings — 9 and 4 respectively. Written reviews point the same way: 2% of 디지털OTP's written reviews are positive against 83% of USIM스마트인증's.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 디지털OTP | USIM스마트인증 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (9 ratings)](https://appshunter.io/ios/app/otp/id1129049090/reviews) | **[1.8 (4 ratings)](https://appshunter.io/ios/app/usim/id1288412388/reviews)** |
| Number of ratings | **9** | 4 |
| Positive reviews | 1.9% of reviews | **82.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free | Free |
| Size | 45 MB | 50 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KFTC](https://appshunter.io/developer/370391938) | [RaonSecure Co., Ltd.](https://appshunter.io/developer/1288412382) |

## What reviewers say

### 디지털OTP

[App page](https://appshunter.io/ios/app/otp/id1129049090)

This app provides a secure digital one-time password (OTP) service directly on your smartphone. It simplifies financial transactions by replacing physical security cards with your mobile device. Register at a participating bank to start using it for secure banking.

**Highlights:** Digital OTP generation, Secure financial transactions, Replaces physical security cards, Supports multiple banks, Face ID authentication, Push notification alerts

**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 디지털OTP free?

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

### Is USIM스마트인증 free?

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

### Which has better reviews, 디지털OTP or USIM스마트인증?

USIM스마트인증 is rated higher. 디지털OTP averages 1.6 out of 5 from 9 ratings, while USIM스마트인증 averages 1.8 from 4 ratings.

### Do 디지털OTP or USIM스마트인증 have ads?

Neither 디지털OTP nor USIM스마트인증 shows ads.

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

디지털OTP ships an update every 4 months, and USIM스마트인증 every 4 months. Most recently, 디지털OTP was updated on October 6, 2026 and USIM스마트인증 on October 9, 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.*