Comparison

MobileKey vs BuildSec 4.0

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

Head to head
About

MobileKey

Manage door statuses, grant remote access, and send digital keys to friends. Receive messages from event management and view access lists. Secure actions with Touch ID.

Highlights
  • Door status overview
  • Remote door openings
  • Send digital keys (Key4Friends)
  • View access lists
  • Receive event management messages
  • Touch ID security
Features
Read full description

MobileKey app to manage DM status, access lists, remote openings, Key4Friends and reception of messages from event management. - Overview of door statuses (if DM cylinder used) - Remote openings - Sending of Key4Friends authorisations - Reading and display of access list - Reception of push messages from event management. - Use of touch ID for security-related actions (disable remote opening, Key4Friends, push messages) The locking plan is fully managed on the MobileKey web application only, which you will find at www.my-mobilekey-com. Extra information: - The app requires valid log-in data for a MobileKey locking system. You need to have a MobileKey account to be able to use the account. You can register free of charge at www.my-mobilekey-com. - Your mobile device needs to have a stable Internet connection to operate the app, such as wireless LAN or 3/4G. - Many functions are only available with the online add-on (SmartBridge). Security takes top priority: Your data is stored on an audited SimonsVoss server in Munich. You do not need to worry about data security and backups. We will do it for you and to a high standard. Instructions: - Create a free MobileKey account for your use. - Obtain all MobileKey components, such as keys and locks. - Set up the MobileKey components in the web application. You will find the precise procedure in the MobileKey manual. - Programme the components. - Test the components. - Fit the components. You will find more help in the enclosed manuals.

About

BuildSec 4.0

Features
Read full description

Using the alarm system app BuildSec 4.0 you are in control of your modern TELENOT hazard alarm system at any time and any place. The alarm system app BuildSec 4.0 is a user software application for smartphones and tablets. The operation of the alarm system app is identical to operation of the keypad BT 800. OPERATION • Setting/unsetting of all partitions • Indication of open dedicated signals (door, window, etc.) • Alarm messages and location in plain text • Disabling of input groups • Operation of switching functions • Displaying of the event memory • Disabling/enabling of the keypad codes CONNECTION MODES • Connection via digital platform hiXserver (currently for intruder alarm control panels complex) • Direct connection between app and alarm system ADVANCED FUNCTIONS • Storage of access data of properties in the application of smartphones/tablets • Optional encryption of property access data is possible • Exporting access data via QR codes • Importing access data via QR code scan • Favorites list • Encrypted data transfer from smartphones/tablets to alarm system • Password-protected login • User authentication via Face ID or Touch ID COMPATIBLE HAZARD ALARM SYSTEMS • Intruder alarm control panel hiplex 8400H (from firmware version 01.01, recommended: firmware version 3 or higher) • Intruder alarm control panels complex 200H / 400H, wireless alarm system compact easy (from firmware version 15.43) in connection with transmission devices 1516 / 2516 / 3516 (from firmware version 6.20)

Screenshots

MobileKey4 screens
BuildSec 4.03 screens

Verdict

The call

MobileKey and BuildSec 4.0 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

MobileKey ships an update every 3 months, BuildSec 4.0 every 2 months. The most recent releases landed on September 10, 2026 and September 19, 2026 respectively.

ScorecardNo meaningful differences
MobileKey versus BuildSec 4.0: the parameters behind the verdict, then further details
ParameterMobileKeyBuildSec 4.0
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews32.3% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.3 — better16.4
Further details — not scored
Size49 MB204 MB
Age rating4+4+
DeveloperSimonsVoss Technologies GmbHTelenot Electronic GmbH

In-app purchases

None

MobileKey

No in-app purchases

None

BuildSec 4.0

No in-app purchases

Questions

Is MobileKey free?
MobileKey is free to download, with no in-app purchases.
Is BuildSec 4.0 free?
BuildSec 4.0 is free to download, with no in-app purchases.
Do MobileKey or BuildSec 4.0 have ads?
Neither MobileKey nor BuildSec 4.0 shows ads.
Which is updated more often, MobileKey or BuildSec 4.0?
MobileKey ships an update every 3 months, and BuildSec 4.0 every 2 months. Most recently, MobileKey was updated on September 10, 2026 and BuildSec 4.0 on September 19, 2026.

Other comparisons