# LSIS SmartViewer vs SYKeyboard

The clearest difference is ads: LSIS SmartViewer at none against SYKeyboard's shown. LSIS SmartViewer also leads on monetization model (free vs ad-supported) and device support (3 vs 1). SYKeyboard's advantage is update cadence (every 3 days vs every 8 days). On price and in-app purchases there is nothing between them.

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

LSIS SmartViewer ships an update every 8 days, SYKeyboard every 3 days. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | LSIS SmartViewer | SYKeyboard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lsis-smartviewer/id1492190615/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 8 days | **Every 3 days** |
| Monetization | **Free** | Ad-supported |
| Size | 18 MB | 29 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [LS ELECTRIC Co., Ltd.](https://appshunter.io/developer/1121925468) | [DongHwan Seo](https://appshunter.io/developer/1767615496) |

## What reviewers say

### LSIS SmartViewer

[App page](https://appshunter.io/ios/app/lsis-smartviewer/id1492190615)

Monitor LS Sanjeon ACB OCR and Smart MCCB devices via BLE communication. View device events and analyze fault waveforms with graphical representation. Supports ACB OCR S-type and Smart MCCB advanced models.

**Highlights:** BLE communication monitoring, Device event viewing, Fault waveform analysis, Graph display of waveforms, ACB OCR S-type support, Smart MCCB advanced support

**Features:** macOS Compatibility

**In-app purchases:** none


### SYKeyboard

[App page](https://appshunter.io/ios/app/sykeyboard/id6670792957)

This keyboard app offers multiple layouts for English and Korean typing, including QWERTY, Naratgeul, Cheonjiin, and Dubeolsik. It features a built-in numeric keypad, one-handed mode, and predictive text with extensive customization options for key repeat, cursor movement, and keyboard dimensions.

**Highlights:** English QWERTY keyboard, Multiple Korean keyboard layouts, Built-in numeric keypad, One-handed typing mode, Predictive text, Customizable keyboard settings

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is LSIS SmartViewer free?

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

### Is SYKeyboard free?

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

### Do LSIS SmartViewer or SYKeyboard have ads?

SYKeyboard shows ads; LSIS SmartViewer does not.

### Which is updated more often, LSIS SmartViewer or SYKeyboard?

LSIS SmartViewer ships an update every 8 days, and SYKeyboard every 3 days. Most recently, LSIS SmartViewer was updated on October 3, 2026 and SYKeyboard on October 10, 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.*