# Synology Secure SignIn vs Split Flap

Synology Secure SignIn and Split Flap both sit at 4.8 stars, but that hides the real split: 100% of Split Flap's written reviews are positive against 47% of Synology Secure SignIn's. Split Flap also leads on update cadence (every 4 weeks vs every 6 months). Synology Secure SignIn's advantage is in-app purchases (none vs 2) and ratings volume (9K vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Split Flap sells 1 one-off in-app purchase. Synology Secure SignIn asks for nothing beyond the download.

Split Flap holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Synology Secure SignIn has 9K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 47% of Synology Secure SignIn's written reviews are positive against 100% of Split Flap's.

Synology Secure SignIn ships an update every 6 months, Split Flap every 4 weeks. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Synology Secure SignIn | Split Flap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (9K ratings)](https://appshunter.io/ios/app/synology-secure-signin/id1513105891/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/split-flap-display-board/id6748541838/reviews)** |
| Number of ratings | **9K** | 1 |
| Positive reviews | 47.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 50 MB | 15 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, Mac, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [Synology Inc.](https://appshunter.io/developer/321493109) | [Gregory Dolder](https://appshunter.io/developer/1556110511) |

## What reviewers say

### 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


### Split Flap

[App page](https://appshunter.io/ios/app/split-flap-display-board/id6748541838)

Transform your devices into a retro message board with authentic flip animations and sound. Display custom messages, live feeds like weather and stocks, and schedule content. Offers a premium upgrade for advanced formatting and scheduling.

**Highlights:** Authentic split-flap flip animation, Customizable messages with line breaks, Live weather and stock feeds, Multiple display themes, Message scheduling, Cross-platform support

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Features | $0.99 | one-time |


## Frequently asked questions

### Is Synology Secure SignIn free?

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

### Is Split Flap free?

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

### Which has better reviews, Synology Secure SignIn or Split Flap?

Split Flap is rated higher. Synology Secure SignIn averages 4.8 out of 5 from 9K ratings, while Split Flap averages 5.0 from 1 ratings.

### Do Synology Secure SignIn or Split Flap have ads?

Neither Synology Secure SignIn nor Split Flap shows ads.

### Which is updated more often, Synology Secure SignIn or Split Flap?

Synology Secure SignIn ships an update every 6 months, and Split Flap every 4 weeks. Most recently, Synology Secure SignIn was updated on November 8, 2026 and Split Flap on October 30, 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.*