# Sentrylink vs Obseron

The clearest difference is update cadence: Obseron at every 2 months against Sentrylink's every 16 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.

Sentrylink ships an update every 16 months, Obseron every 2 months. The most recent releases landed on June 1, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Sentrylink | Obseron |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 92 MB | 7 MB |
| Requires iOS | **12.0** | 12.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Langtao Digital Co., Ltd.](https://appshunter.io/developer/1465690696) | [Valvova Oy, turvaratkaisut](https://appshunter.io/developer/949428709) |

## What reviewers say

### 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


### Obseron

[App page](https://appshunter.io/ios/app/obseron/id1533044338)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sentrylink free?

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

### Is Obseron free?

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

### Do Sentrylink or Obseron have ads?

Neither Sentrylink nor Obseron shows ads.

### Which is updated more often, Sentrylink or Obseron?

Sentrylink ships an update every 16 months, and Obseron every 2 months. Most recently, Sentrylink was updated on June 1, 2026 and Obseron on September 27, 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.*