# 내신등급 계산기 vs SLS

The clearest difference is ads: SLS at none against 내신등급 계산기's shown. SLS also leads on monetization model (free vs ad-supported) and iOS requirement (12.0 vs 16.4). 내신등급 계산기's advantage is update cadence (every 3 weeks vs every 8 months) and review sentiment (49% vs 33%). On price, 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.

내신등급 계산기 ships an update every 3 weeks, SLS every 8 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 내신등급 계산기 | SLS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **49.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 8 months |
| Monetization | Ad-supported | **Free** |
| Size | 98 MB | 13 MB |
| Requires iOS | 16.4 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [JongHyeok Park](https://appshunter.io/developer/1453354648) | [IAP EDU](https://appshunter.io/developer/1545801777) |

## What reviewers say

### 내신등급 계산기

[App page](https://appshunter.io/ios/app/id1485566114)

Calculate your current GPA, track your progress towards a target GPA, and simulate future grades. Supports both the 2022 and 2015 Korean education curricula.

**Highlights:** GPA calculation by semester/year, Target GPA goal setting, Grade simulation for future semesters, Midterm exam grade calculation, Mock exam and CSAT minimum requirement check, College admissions data search, 9-grade system conversion

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

**In-app purchases:** none


### SLS

[App page](https://appshunter.io/ios/app/sls/id1545901734)

This is a smart application for Korean language learning, developed by IAP EDU. It offers an educational experience focused on mastering the Korean language.

**Highlights:** Korean language learning, Smart application, Educational content, Developed by IAP EDU

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 내신등급 계산기 free?

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

### Is SLS free?

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

### Do 내신등급 계산기 or SLS have ads?

내신등급 계산기 shows ads; SLS does not.

### Which is updated more often, 내신등급 계산기 or SLS?

내신등급 계산기 ships an update every 3 weeks, and SLS every 8 months. Most recently, 내신등급 계산기 was updated on November 7, 2026 and SLS on November 3, 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.*