# Password 4 Pro vs 雙重驗證

The clearest difference is in-app purchases: 雙重驗證 at none against Password 4 Pro's 3. 雙重驗證 also leads on ads (none vs shown) and device support (4 vs 2). Password 4 Pro's advantage is update cadence (fortnightly vs every 8 months). On price and iOS requirement there is nothing between them.

Both are free to download. Password 4 Pro sells 3 in-app purchases, starting at $0.99 per month. 雙重驗證 asks for nothing beyond the download.

Password 4 Pro ships an update fortnightly, 雙重驗證 every 8 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Password 4 Pro | 雙重驗證 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/password-4-pro/id570632076/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 44.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 8 months |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 0 MB |
| Requires iOS | 15.0 | **14.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Gerinn LLC](https://appshunter.io/developer/537042831) | [Meng-Yuan Huang](https://appshunter.io/developer/1526621891) |

## What reviewers say

### Password 4 Pro

[App page](https://appshunter.io/ios/app/password-4-pro/id570632076)

Securely manage all your passwords and sensitive information with military-level encryption. This app offers local backups, a secure notebook, and the ability to store images like credit cards. It features biometric unlock and an anti-screenshot function for enhanced privacy.

**Highlights:** Local data backup, Secure notebook, Save image information, Generate random passwords, Biometric unlock, Anti-screenshot

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Quarterly | $1.99 | per 3 months |
| Annual | $5.99 | per year |


### 雙重驗證

[App page](https://appshunter.io/ios/app/id1580807295)

**In-app purchases:** none


## Frequently asked questions

### Is Password 4 Pro free?

Password 4 Pro is free to download, with in-app purchases available.

### Is 雙重驗證 free?

雙重驗證 is free to download, with no in-app purchases.

### Do Password 4 Pro or 雙重驗證 have ads?

Password 4 Pro shows ads; 雙重驗證 does not.

### Which is updated more often, Password 4 Pro or 雙重驗證?

Password 4 Pro ships an update fortnightly, and 雙重驗證 every 8 months. Most recently, Password 4 Pro was updated on November 1, 2026 and 雙重驗證 on November 3, 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.*