# SLS vs History Dial

The clearest difference is update cadence: History Dial at every 3 days against SLS's every 8 months. SLS's advantage is iOS requirement (12.0 vs 15.6). On price, ads, 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.

SLS ships an update every 8 months, History Dial every 3 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SLS | History Dial |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 13 MB | 3 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IAP EDU](https://appshunter.io/developer/1545801777) | [JONGHYUN PARK](https://appshunter.io/developer/1863369780) |

## What reviewers say

### 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


### History Dial

[App page](https://appshunter.io/ios/app/history-dial/id6758134704)

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

**In-app purchases:** none


## Frequently asked questions

### Is SLS free?

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

### Is History Dial free?

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

### Do SLS or History Dial have ads?

Neither SLS nor History Dial shows ads.

### Which is updated more often, SLS or History Dial?

SLS ships an update every 8 months, and History Dial every 3 days. Most recently, SLS was updated on November 3, 2026 and History Dial on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*