# TD vs 凌度钥匙Plus

The clearest difference is update cadence: 凌度钥匙Plus at every 3 weeks against TD's every 50 months. TD's advantage is iOS requirement (8.0 vs 13.0). 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.

TD ships an update every 50 months, 凌度钥匙Plus every 3 weeks. The most recent releases landed on September 30, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | TD | 凌度钥匙Plus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 50 months | **Every 3 weeks** |
| Size | 6 MB | 38 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [杏生 卢](https://appshunter.io/developer/1094592555) | [Shenzhen Lingdu Auto Electronics Co., Ltd.](https://appshunter.io/developer/1727524224) |

## What reviewers say

### TD

[App page](https://appshunter.io/ios/app/td-7s/id1324437064)

**Features:** macOS Compatibility

**In-app purchases:** none


### 凌度钥匙Plus

[App page](https://appshunter.io/ios/app/plus/id6448126824)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TD free?

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

### Is 凌度钥匙Plus free?

凌度钥匙Plus is free to download, with no in-app purchases.

### Do TD or 凌度钥匙Plus have ads?

Neither TD nor 凌度钥匙Plus shows ads.

### Which is updated more often, TD or 凌度钥匙Plus?

TD ships an update every 50 months, and 凌度钥匙Plus every 3 weeks. Most recently, TD was updated on September 30, 2026 and 凌度钥匙Plus on October 5, 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.*