# KaNKaN vs Authenticator

The clearest difference is price: Authenticator at Free against KaNKaN's $2.99. Authenticator also leads on update cadence (monthly vs every 101 months). KaNKaN's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support there is nothing between them.

Authenticator is free to download; KaNKaN costs $2.99 up front. Authenticator sells 2 in-app purchases, starting at $6.99 per 7 days. KaNKaN asks for nothing beyond the download.

KaNKaN ships an update every 101 months, Authenticator monthly. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | KaNKaN | Authenticator |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 101 months | **Monthly** |
| Monetization | Paid | — |
| Size | 29 MB | 49 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kaji Takatsugu](https://appshunter.io/developer/465688467) | [Huong Dang](https://appshunter.io/developer/1896285075) |

## What reviewers say

### 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


### Authenticator

[App page](https://appshunter.io/ios/app/authenticator-2fa-and-vault/id6809136121)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium Access | $6.99 | per 7 days |
| Yearly Premium Access | $39.99 | per year |


## Frequently asked questions

### Is KaNKaN free?

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

### Is Authenticator free?

Authenticator is free to download, with in-app purchases available.

### Do KaNKaN or Authenticator have ads?

Authenticator shows ads; KaNKaN does not.

### Which is updated more often, KaNKaN or Authenticator?

KaNKaN ships an update every 101 months, and Authenticator monthly. Most recently, KaNKaN was updated on November 11, 2026 and Authenticator on October 31, 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.*