# ZeroOne Keyboard vs 双拼岛

The clearest difference is in-app purchases: ZeroOne Keyboard at none against 双拼岛's 2. ZeroOne Keyboard also leads on iOS requirement (16.0 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 双拼岛 sells 2 in-app purchases, starting at $1.99 per month. ZeroOne Keyboard asks for nothing beyond the download.

ZeroOne Keyboard ships an update every 4 days, 双拼岛 weekly. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ZeroOne Keyboard | 双拼岛 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/zeroone-keyboard/id6757943442/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 40 MB | 64 MB |
| Requires iOS | **16.0** | 18.6 |
| Devices | **iPhone, Mac** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [海平 吴](https://appshunter.io/developer/1011086237) | [秋萍 明](https://appshunter.io/developer/1671497003) |

## What reviewers say

### ZeroOne Keyboard

[App page](https://appshunter.io/ios/app/zeroone-keyboard/id6757943442)

This keyboard app offers advanced Chinese shuangpin input with on-device processing for enhanced privacy. It features customizable schemes, emoji support, conversion tools, and theme syncing.

**Highlights:** Multiple shuangpin schemes, On-device data processing, Full Unicode emoji support, Math and unit conversions, Customizable themes, Local sync for themes and snippets

**Features:** Vision Pro support

**In-app purchases:** none


### 双拼岛

[App page](https://appshunter.io/ios/app/id6759847855)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $1.99 | per month |
| LifeTime | $14.99 | one-time |


## Frequently asked questions

### Is ZeroOne Keyboard free?

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

### Is 双拼岛 free?

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

### Do ZeroOne Keyboard or 双拼岛 have ads?

Neither ZeroOne Keyboard nor 双拼岛 shows ads.

### Which is updated more often, ZeroOne Keyboard or 双拼岛?

ZeroOne Keyboard ships an update every 4 days, and 双拼岛 weekly. Most recently, ZeroOne Keyboard was updated on October 9, 2026 and 双拼岛 on October 7, 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.*