# 密码本 vs NFC無源掛鎖

The clearest difference is device support: 密码本 at 2 against NFC無源掛鎖's —. 密码本 also leads on iOS requirement (10.0 vs 13.0). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | 密码本 | NFC無源掛鎖 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | — |
| Update frequency | Every 12 months | — |
| Size | 7 MB | 2 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [志化 彭](https://appshunter.io/developer/1226811775) | [Holtek Semiconductor(China) Inc](https://appshunter.io/developer/1052056181) |

## What reviewers say

### 密码本

[App page](https://appshunter.io/ios/app/id1501521526)

**Features:** macOS Compatibility

**In-app purchases:** none


### NFC無源掛鎖

[App page](https://appshunter.io/ios/app/nfc/id6446962940)

**In-app purchases:** none


## Frequently asked questions

### Is 密码本 free?

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

### Is NFC無源掛鎖 free?

NFC無源掛鎖 is free to download, with no in-app purchases.

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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.*