# 在留 Zairyu vs Sign In Authenticator

The clearest difference is update cadence: Sign In Authenticator at weekly against 在留 Zairyu's fortnightly. 在留 Zairyu's advantage is iOS requirement (16.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 在留 Zairyu sells 1 one-off in-app purchase and Sign In Authenticator sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

在留 Zairyu ships an update fortnightly, Sign In Authenticator weekly. The most recent releases landed on November 10, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | 在留 Zairyu | Sign In Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sign-in-authenticator/id6813260315/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Size | 4 MB | 27 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [TOMONARI NATSUKAWA](https://appshunter.io/developer/6772284354) | [GetProAct Inc.](https://appshunter.io/developer/6808792201) |

## What reviewers say

### 在留 Zairyu

[App page](https://appshunter.io/ios/app/zairyu-residence-card/id6783866391)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zairyu Pro | $3.99 | one-time |


### Sign In Authenticator

[App page](https://appshunter.io/ios/app/sign-in-authenticator/id6813260315)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sign In Pro Weekly | $6.99 | per 7 days |
| Sign In Pro Yearly | $49.99 | per year |


## Frequently asked questions

### Is 在留 Zairyu free?

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

### Is Sign In Authenticator free?

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

### Do 在留 Zairyu or Sign In Authenticator have ads?

Neither 在留 Zairyu nor Sign In Authenticator shows ads.

### Which is updated more often, 在留 Zairyu or Sign In Authenticator?

在留 Zairyu ships an update fortnightly, and Sign In Authenticator weekly. Most recently, 在留 Zairyu was updated on November 10, 2026 and Sign In Authenticator on November 12, 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.*