Comparison

Sentrylink vs Obseron

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

Sentrylink

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

Read full description

Sentrylink is a smart video intercom solution. Doordeer app is an important tool for: - Remote open front door by swiping on mobile screen of this app. - Live video and audio to check the front door. - Share doorcode to guests who can use it to open front door in the specified period. - Search all unlock logs from cloud storage and playback. - Receive call message and start video-talk with the visitor in front of doordeer panel.

About

Obseron

Features

Read full description

A remote client for connecting Obseron video management system recorders. Full feature list: - View live image and recordings in a single Timeline - Timeline control by swiping or with playback buttons - Optimize the image quality for your mobile connection - View multiple cameras in one screen - Jump to exact date and time in recordings - Share camera snapshots to other apps - Connect to your Obseron servers on the move - Add multiple servers for comprehensive monitoring - In-app demo server access

Screenshots

Sentrylink4 screens

Obseron4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard1 real difference · 7 level

Sentrylink versus Obseron: the parameters behind the verdict, then further details
Parameter	Sentrylink	Obseron
Price	Free	Free
Positive reviews	33.3% of reviews	—
Update frequency	Every 16 months	Every 2 months — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	12.0 — better	12.4
Further details — not scored
Size	92 MB	7 MB
Age rating	4+	4+
Developer	Langtao Digital Co., Ltd.	Valvova Oy, turvaratkaisut

In-app purchases

None

Sentrylink

No in-app purchases

None

Obseron

No in-app purchases

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.