# eSLS TOEIC® vs BDU 스마트인증

The clearest difference is update cadence: eSLS TOEIC® at every 2 months against BDU 스마트인증's every 32 months. eSLS TOEIC® also leads on review sentiment (24% vs 0%). BDU 스마트인증's advantage is iOS requirement (13.0 vs 15.0). 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.

eSLS TOEIC® ships an update every 2 months, BDU 스마트인증 every 32 months. The most recent releases landed on September 10, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | eSLS TOEIC® | BDU 스마트인증 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/esls-toeic/id383546041/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **24.1% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 32 months |
| Monetization | Free | Free |
| Size | 68 MB | 9 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YBM NET, Inc.](https://appshunter.io/developer/332188969) | [BDU](https://appshunter.io/developer/961518255) |

## What reviewers say

### eSLS TOEIC®

[App page](https://appshunter.io/ios/app/esls-toeic/id383546041)

This service offers mock TOEIC tests and learning materials for university students enrolled in online TOEIC courses. It syncs progress with the web platform and provides features for test navigation and question review. It is exclusively available on iPhones and iPads.

**Highlights:** Mock TOEIC tests, Learning materials, Web platform sync, Progress tracking, Test navigation, Question review

**In-app purchases:** none


### BDU 스마트인증

[App page](https://appshunter.io/ios/app/bdu/id1539603834)

This mobile biometric authentication solution replaces traditional passwords and certificates with advanced identity verification. It offers a secure and convenient way to log into various work systems using fingerprint, PIN, or OTP, ensuring strong user authentication.

**Highlights:** Mobile biometric authentication, Replaces passwords and certificates, Fingerprint, PIN, and OTP options, Secure login for work systems, Patented technology for screen lock authentication, Complies with national information security guidelines

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is eSLS TOEIC® free?

eSLS TOEIC® is free to download, with no in-app purchases.

### Is BDU 스마트인증 free?

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

### Do eSLS TOEIC® or BDU 스마트인증 have ads?

Neither eSLS TOEIC® nor BDU 스마트인증 shows ads.

### Which is updated more often, eSLS TOEIC® or BDU 스마트인증?

eSLS TOEIC® ships an update every 2 months, and BDU 스마트인증 every 32 months. Most recently, eSLS TOEIC® was updated on September 10, 2026 and BDU 스마트인증 on September 12, 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.*