# OtterBoard vs HK Mixed Keyboard

The clearest difference is in-app purchases: HK Mixed Keyboard at none against OtterBoard's 8. HK Mixed Keyboard also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. OtterBoard sells 8 in-app purchases, starting at $5.99 per year. HK Mixed Keyboard asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on November 7, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | OtterBoard | HK Mixed Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/otterboard/id6803947273/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | Every 5 days |
| Size | 216 MB | 15 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [One Eternal](https://appshunter.io/developer/6792182843) | [Lung Wai Hor](https://appshunter.io/developer/6779518340) |

## What reviewers say

### OtterBoard

[App page](https://appshunter.io/ios/app/otterboard/id6803947273)

**Features:** iPhone Duo support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OtterBoard Pro Yearly | $5.99 | per year |
| 極光鍵盤主題 | $1.99 | one-time |
| 青苔螢火鍵盤主題 | $3.99 | one-time |
| 墨流鍵盤主題 | $4.99 | one-time |
| 夢幻泡泡鍵盤主題 | $5.99 | one-time |
| 機械 RGB 鍵盤主題 01 | $5.99 | one-time |
| 倉頡碼雨 Cangjie Rain 鍵盤主題 | $5.99 | one-time |
| OtterBoard Pro Lifetime | $14.99 | one-time |


### HK Mixed Keyboard

[App page](https://appshunter.io/ios/app/hk-mixed-keyboard/id6818359136)

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

**In-app purchases:** none


## Frequently asked questions

### Is OtterBoard free?

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

### Is HK Mixed Keyboard free?

HK Mixed Keyboard is free to download, with no in-app purchases.

### Do OtterBoard or HK Mixed Keyboard have ads?

OtterBoard shows ads; HK Mixed Keyboard does not.

### Which is updated more often, OtterBoard or HK Mixed Keyboard?

OtterBoard ships an update every 5 days, and HK Mixed Keyboard every 5 days. Most recently, OtterBoard was updated on November 7, 2026 and HK Mixed Keyboard on November 6, 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.*