# King Sejong Keyboard vs ElectroCalc Pro

The clearest difference is price: ElectroCalc Pro at Free against King Sejong Keyboard's $27.00. King Sejong Keyboard's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

ElectroCalc Pro is free to download; King Sejong Keyboard costs $27.00 up front. ElectroCalc Pro sells 1 one-off in-app purchase. King Sejong Keyboard asks for nothing beyond the download.

King Sejong Keyboard ships an update fortnightly, ElectroCalc Pro every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | King Sejong Keyboard | ElectroCalc Pro |
| --- | --- | --- |
| Price | $27.00 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Paid | — |
| Size | 67 MB | 27 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TeraBaTek Co., Ltd](https://appshunter.io/developer/1625214140) | [DONGSOO LEE](https://appshunter.io/developer/1868670088) |

## What reviewers say

### King Sejong Keyboard

[App page](https://appshunter.io/ios/app/king-sejong-keyboard/id6445901835)

Experience a faster, more accurate typing experience with a customizable keyboard. Design your layout, choose colors and fonts, and utilize quick-type features for increased productivity. It prioritizes user privacy and offers a smart typing solution.

**Highlights:** Shift-less keyboard layout, Customizable key layouts and screen settings, Personalized colors and fonts, QuickType settings for rapid access, Save favorite texts and images, Multi-language support with Korean layouts

**In-app purchases:** none


### ElectroCalc Pro

[App page](https://appshunter.io/ios/app/electrocalc-pro/id6758211193)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is King Sejong Keyboard free?

King Sejong Keyboard costs $27.00, with no in-app purchases.

### Is ElectroCalc Pro free?

ElectroCalc Pro is free to download, with in-app purchases available.

### Do King Sejong Keyboard or ElectroCalc Pro have ads?

ElectroCalc Pro shows ads; King Sejong Keyboard does not.

### Which is updated more often, King Sejong Keyboard or ElectroCalc Pro?

King Sejong Keyboard ships an update fortnightly, and ElectroCalc Pro every 3 months. Most recently, King Sejong Keyboard was updated on October 24, 2026 and ElectroCalc Pro on October 24, 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.*