# 房贷计算器2021 vs 大钥匙

The clearest difference is update cadence: 大钥匙 at every 5 weeks against 房贷计算器2021's every 72 months. 大钥匙 also leads on iOS requirement (9.0 vs 11.0). On price, ads, 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.

房贷计算器2021 ships an update every 72 months, 大钥匙 every 5 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 房贷计算器2021 | 大钥匙 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 72 months | **Every 5 weeks** |
| Size | 24 MB | 52 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [立乾 董](https://appshunter.io/developer/963104158) | [Unovo Intelligence Technology (Shanghai) Co., Ltd.](https://appshunter.io/developer/1124001817) |

## What reviewers say

### 房贷计算器2021

[App page](https://appshunter.io/ios/app/2021/id1001982940)

**Features:** macOS Compatibility

**In-app purchases:** none


### 大钥匙

[App page](https://appshunter.io/ios/app/id1562611576)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 房贷计算器2021 free?

房贷计算器2021 is free to download, with no in-app purchases.

### Is 大钥匙 free?

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

### Do 房贷计算器2021 or 大钥匙 have ads?

Neither 房贷计算器2021 nor 大钥匙 shows ads.

### Which is updated more often, 房贷计算器2021 or 大钥匙?

房贷计算器2021 ships an update every 72 months, and 大钥匙 every 5 weeks. Most recently, 房贷计算器2021 was updated on October 26, 2026 and 大钥匙 on October 27, 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.*