# Hidden msg vs Sentrylink

The clearest difference is update cadence: Hidden msg at every 3 months against Sentrylink's every 16 months. Hidden msg also leads on iOS requirement (10.0 vs 12.0). Sentrylink's advantage is review sentiment (33% vs 14%). 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.

Hidden msg ships an update every 3 months, Sentrylink every 16 months. The most recent releases landed on September 8, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Hidden msg | Sentrylink |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (6 ratings)](https://appshunter.io/ios/app/hidden-msg-hide-your-files/id1175929880/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 14.3% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 16 months |
| Monetization | Free | Free |
| Size | 4 MB | 92 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Malek Radhouani](https://appshunter.io/developer/1155826017) | [Langtao Digital Co., Ltd.](https://appshunter.io/developer/1465690696) |

## What reviewers say

### Hidden msg

[App page](https://appshunter.io/ios/app/hidden-msg-hide-your-files/id1175929880)

Securely send and receive hidden files within iMessage. Protect your sensitive data with Touch ID/Face ID authentication. Customize the visible placeholder image for unauthorized viewers.

**Highlights:** Send and receive hidden files in iMessage, Touch ID/Face ID protection, Customizable placeholder image, Secure storage on Apple servers, iCloud account required

**Features:** iMessage stickers

**In-app purchases:** none


### Sentrylink

[App page](https://appshunter.io/ios/app/sentrylink/id1459488074)

This app allows you to remotely open your front door, view live video and audio of visitors, and share temporary door codes. You can also review unlock logs and communicate with guests via video call.

**Highlights:** Remote door unlocking, Live video and audio feed, Shareable temporary door codes, Unlock log history, Video calls with visitors

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hidden msg free?

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

### Is Sentrylink free?

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

### Do Hidden msg or Sentrylink have ads?

Neither Hidden msg nor Sentrylink shows ads.

### Which is updated more often, Hidden msg or Sentrylink?

Hidden msg ships an update every 3 months, and Sentrylink every 16 months. Most recently, Hidden msg was updated on September 8, 2026 and Sentrylink on September 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*