# 天文观测 vs ZeroOne Keyboard

The clearest difference is update cadence: ZeroOne Keyboard at every 4 days against 天文观测's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 天文观测 sells 1 in-app purchase, starting at $1.99 per 7 days and ZeroOne Keyboard sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

天文观测 ships an update fortnightly, ZeroOne Keyboard every 4 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 天文观测 | ZeroOne Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/zeroone-keyboard/id6757943442/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | — | Free |
| Size | 32 MB | 43 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | iPhone, iPod | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [燕燕 林](https://appshunter.io/developer/1675436596) | [海平 吴](https://appshunter.io/developer/1011086237) |

## What reviewers say

### 天文观测

[App page](https://appshunter.io/ios/app/id6756773180)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 天文观测尊贵会员 | $1.99 | per 7 days |


### ZeroOne Keyboard

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

This keyboard app offers multiple input methods for Chinese typing, including Pinyin, nine-key, and Shuangpin. It provides on-device processing for privacy and includes various tools like emoji, snippets, and unit conversion. Customize your typing experience with sound packs and key shortcuts.

**Highlights:** Multiple Chinese input methods (Pinyin, nine-key, Shuangpin), On-device processing for privacy, Customizable layouts and key shortcuts, Sound packs and typing feedback options, Integrated tools (emoji, snippets, unit conversion), Traditional Chinese support

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Cup of Tea | $0.99 | one-time |
| Two Cups of Tea | $2.99 | one-time |
| Afternoon Tea | $3.99 | one-time |
| 01+ Lifetime Supporter | $9.99 | one-time |


## Frequently asked questions

### Is 天文观测 free?

天文观测 is free to download, with in-app purchases available.

### Is ZeroOne Keyboard free?

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

### Do 天文观测 or ZeroOne Keyboard have ads?

Neither 天文观测 nor ZeroOne Keyboard shows ads.

### Which is updated more often, 天文观测 or ZeroOne Keyboard?

天文观测 ships an update fortnightly, and ZeroOne Keyboard every 4 days. Most recently, 天文观测 was updated on October 28, 2026 and ZeroOne Keyboard on October 31, 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.*