# Password 4 Pro vs KaNKaN

The clearest difference is price: Password 4 Pro at Free against KaNKaN's $2.99. Password 4 Pro also leads on update cadence (fortnightly vs every 101 months). KaNKaN's advantage is review sentiment (86% vs 44%) and in-app purchases (none vs 3). On device support there is nothing between them.

Password 4 Pro is free to download; KaNKaN costs $2.99 up front. Password 4 Pro sells 3 in-app purchases, starting at $0.99 per month. KaNKaN asks for nothing beyond the download.

Password 4 Pro ships an update fortnightly, KaNKaN every 101 months. The most recent releases landed on October 20, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Password 4 Pro | KaNKaN |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/password-4-pro/id570632076/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 44.3% of reviews | **85.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 101 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 13 MB | 29 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gerinn LLC](https://appshunter.io/developer/537042831) | [Kaji Takatsugu](https://appshunter.io/developer/465688467) |

## 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 |


### KaNKaN

[App page](https://appshunter.io/ios/app/kankan/id1084225678)

This app simulates Japanese fire truck sirens and flashing lights. It allows users to record and play back custom sounds, featuring different siren patterns and bell sounds. Note that it does not function as a real siren amplifier and legal use of siren sounds should be confirmed.

**Highlights:** Simulated fire truck sirens, Flashing light patterns, Custom sound recording, Preset siren and bell sounds, Left/right turn sound effects, Adjustable siren volume

**Features:** macOS Compatibility

**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 KaNKaN free?

KaNKaN costs $2.99, with no in-app purchases.

### Do Password 4 Pro or KaNKaN have ads?

Password 4 Pro shows ads; KaNKaN does not.

### Which is updated more often, Password 4 Pro or KaNKaN?

Password 4 Pro ships an update fortnightly, and KaNKaN every 101 months. Most recently, Password 4 Pro was updated on October 20, 2026 and KaNKaN on October 17, 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.*