# Redo Calculator vs 킹보드

The clearest difference is ads: Redo Calculator at none against 킹보드's shown. Redo Calculator also leads on iOS requirement (13.0 vs 17.0). 킹보드's advantage is update cadence (every 2 days vs every 2 months). 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.

Redo Calculator ships an update every 2 months, 킹보드 every 2 days. The most recent releases landed on October 7, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Redo Calculator | 킹보드 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ai/id6762074672/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 72.7% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 20 MB | 45 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Seongmin Yim](https://appshunter.io/developer/1529542974) | [Dong sub Park](https://appshunter.io/developer/1892789243) |

## What reviewers say

### Redo Calculator

[App page](https://appshunter.io/ios/app/redo-calculator/id6753993375)

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

**In-app purchases:** none


### 킹보드

[App page](https://appshunter.io/ios/app/ai/id6762074672)

Enhance your typing experience with an AI-powered keyboard that offers instant grammar correction, translation, and style adjustments. Access frequently used phrases, emojis, and customize your keyboard layout and themes.

**Highlights:** AI-powered grammar and spelling correction, Instant translation of typed or pasted text, Contextual style conversion for different situations, Text replacement with custom shortcuts, Quick access to saved notes and clipboard history, Emoji keyboard with categories and recents, Customizable keyboard settings (layout, themes, sound)

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

**In-app purchases:** none


## Frequently asked questions

### Is Redo Calculator free?

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

### Is 킹보드 free?

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

### Do Redo Calculator or 킹보드 have ads?

킹보드 shows ads; Redo Calculator does not.

### Which is updated more often, Redo Calculator or 킹보드?

Redo Calculator ships an update every 2 months, and 킹보드 every 2 days. Most recently, Redo Calculator was updated on October 7, 2026 and 킹보드 on October 19, 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.*