# Stellantis Authenticator vs Synology Secure SignIn

The clearest difference is review sentiment: Synology Secure SignIn at 47% against Stellantis Authenticator's 29%. Synology Secure SignIn also leads on update cadence (every 6 months vs every 18 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Stellantis Authenticator ships an update every 18 months, Synology Secure SignIn every 6 months. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Stellantis Authenticator | Synology Secure SignIn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (9K ratings)](https://appshunter.io/ios/app/synology-secure-signin/id1513105891/reviews)** |
| Number of ratings | — | **9K** |
| Positive reviews | 28.6% of reviews | **47.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 6 months** |
| Monetization | Free | Free |
| Size | 38 MB | 50 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Stellantis Auto SAS](https://appshunter.io/developer/1358688445) | [Synology Inc.](https://appshunter.io/developer/321493109) |

## What reviewers say

### Stellantis Authenticator

[App page](https://appshunter.io/ios/app/stellantis-authenticator/id1498422037)

This utility app provides multi-factor authentication for accessing services provided by Stellantis. Users require an activation code, obtainable autonomously through a provided web link, to enroll and secure their identity.

**Highlights:** Multi-factor authentication, User identity verification, Secure access to Stellantis services, Autonomous activation code retrieval, Service access control

**Features:** Vision Pro support

**In-app purchases:** none


### Synology Secure SignIn

[App page](https://appshunter.io/ios/app/synology-secure-signin/id1513105891)

Enhance your account security with two-factor authentication.  Approve sign-in requests or use verification codes to protect your Synology NAS and account.  It can even replace your password for a more streamlined yet secure login experience.

**Highlights:** Two-factor authentication, Approve sign-in requests, Verification code (OTP), Password replacement, Enhanced account security

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Efficient and reliable
- 🔒 Secure authentication
- 👍 Easy to use
- 💡 Innovative security features

**What reviewers complain about**

- 🐛 Inconsistent performance
- 🔒 Lack of biometric security
- 👎 Poor user experience
- 🔋 Slow push notifications

**Reported bugs**

- Approval requests not showing up
- OTP codes not working as expected
- Incompatibility with some DSM versions
- Unreliable login process

**Requested features**

- Add Face/Touch ID validation
- Improve Apple Watch integration
- Implement search/grouping for OTP codes
- Enhance multi-device synchronization


## Frequently asked questions

### Is Stellantis Authenticator free?

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

### Is Synology Secure SignIn free?

Synology Secure SignIn is free to download, with no in-app purchases.

### Do Stellantis Authenticator or Synology Secure SignIn have ads?

Neither Stellantis Authenticator nor Synology Secure SignIn shows ads.

### Which is updated more often, Stellantis Authenticator or Synology Secure SignIn?

Stellantis Authenticator ships an update every 18 months, and Synology Secure SignIn every 6 months. Most recently, Stellantis Authenticator was updated on November 3, 2026 and Synology Secure SignIn on November 8, 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.*