# 레일휘슬 vs iSIGN+ PASS v2

The clearest difference is update cadence: iSIGN+ PASS v2 at every 2 months against 레일휘슬's every 8 months. On price, ads, in-app purchases and device support there is nothing between them.

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

레일휘슬 ships an update every 8 months, iSIGN+ PASS v2 every 2 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | 레일휘슬 | iSIGN+ PASS v2 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 16.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 23 MB | 39 MB |
| Requires iOS | 15.0 | 15 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [한국철도공사](https://appshunter.io/developer/404736496) | [Penta Security Inc.](https://appshunter.io/developer/919437580) |

## What reviewers say

### 레일휘슬

[App page](https://appshunter.io/ios/app/id1532691741)

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

**In-app purchases:** none


### iSIGN+ PASS v2

[App page](https://appshunter.io/ios/app/isign-plus-pass-v2/id6444204442)

Streamline your logins with secure, simple authentication. Choose from Face ID, fingerprint, PIN, or QR codes instead of complex passwords. Track your login history and manage connected services for enhanced security.

**Highlights:** Simple authentication methods, Face ID and fingerprint login, PIN, pattern, OTP, QR support, Login history tracking, Service list management, Secure login management

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 레일휘슬 free?

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

### Is iSIGN+ PASS v2 free?

iSIGN+ PASS v2 is free to download, with no in-app purchases.

### Do 레일휘슬 or iSIGN+ PASS v2 have ads?

Neither 레일휘슬 nor iSIGN+ PASS v2 shows ads.

### Which is updated more often, 레일휘슬 or iSIGN+ PASS v2?

레일휘슬 ships an update every 8 months, and iSIGN+ PASS v2 every 2 months. Most recently, 레일휘슬 was updated on November 3, 2026 and iSIGN+ PASS v2 on November 7, 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.*