# 双键 vs Rectfly

The clearest difference is in-app purchases: Rectfly at none against 双键's 2. 双键's advantage is iOS requirement (17.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 双键 sells 2 one-off in-app purchases. Rectfly asks for nothing beyond the download.

双键 ships an update every 3 days, Rectfly every 2 days. Both last shipped on November 13, 2026.

## The numbers

| Metric | 双键 | Rectfly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 days | **Every 2 days** |
| Size | 30 MB | 56 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [云龙 朱](https://appshunter.io/developer/1521823760) | [YUCHEN LIU](https://appshunter.io/developer/6825926570) |

## What reviewers say

### 双键

[App page](https://appshunter.io/ios/app/id6803302251)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 微软双拼 | $1.99 | one-time |
| 搜狗双拼 | $1.99 | one-time |


### Rectfly

[App page](https://appshunter.io/ios/app/rectfly/id6825926478)

**In-app purchases:** none


## Frequently asked questions

### Is 双键 free?

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

### Is Rectfly free?

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

### Do 双键 or Rectfly have ads?

Neither 双键 nor Rectfly shows ads.

### Which is updated more often, 双键 or Rectfly?

双键 ships an update every 3 days, and Rectfly every 2 days. Most recently, 双键 was updated on November 13, 2026 and Rectfly on November 13, 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.*