SLC Assist vs L+L Direct
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
SLC Assist
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Schmersal SLC Assist informs you about the diagnosis and configuration data of your Schmersal safety light curtain via Bluetooth interface. You do not only have all information about your safety light curtain available, SLC Assist is also an important tool for installation, service and documentation. Device and configuration data With the device data you get general information about the light curtain such as the type, the serial number, the protective field resolution and the field height. In device configuration you see the functions which have been parameterized and are enabled. Device status With the display of the device status you see the signal strength of each individual beam in real time, the active operation mode, the status of the OSSD outputs and the status of the protective field. It is self-evident that you see if the protective area is interrupted. Alignment and installation of a light curtain When you align the light curtain, you will use the display of the signal strength of each beam. One star is shown if the quality of the alignment is to be improved. Three stars are displayed when the alignment is perfect. Service and maintenance With a counter you are informed about the number of switching cycles. With this information you will schedule e.g. the service cycles of the safety relay module. The operating hours are shown to define the intervals for the intermediate checks. Documentation To archive the device information and the device data you save the actual status on your smartphone or tablet. This facilitates the documentation e.g. after a functional or intermediate inspection. Additional you may send the actual status via email to store it to your document server. For an optimal commissioning and best possible use of operation you may download the operation manual directly from the app to your smartphone or tablet. The light curtain with bluetooth interface and the related Schmersal app is the optimal tool and assists you by - Condition monitoring - Optimal alignment - Preventive maintenance - Documentation according to national safety regulations Safety distance calculation Schmersal SLC Assist calculates the safety distance in accordance with the EN ISO 13885:2010 standard. The safety distance is carried out for the application areas where the protective field is vertical to the approach direction. The calculation applies exclusively to industrial applications! Product selection Product selection based on specification and functions. For more information visit www.schmersal.com
L+L Direct
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Langer + Laumann β Elevator Door Drive Modernization, Made Simple The official Langer+Laumann app brings the entire elevator door drive replacement process to your smartphone. Photograph the existing door drive, request a quote, manage it, and communicate with our team β all in one place, directly on-site. About Langer+Laumann Langer+Laumann is a specialist in drive systems for elevator and machine room doors. For more than 25 years, we have been developing and manufacturing the most widely used modernization solutions on the market. Our conversion packages for elevator doors replace defective or worn door drives simply and quickly β for virtually every manufacturer, including OTIS, KONE, Schindler, TK Elevator, Fermator, and many more. With a database of over 500 door drive models and conversion packages available from stock, we offer ultra-short delivery times. Often, a single photo of your existing system is enough for us to identify the right solution. Reliable German engineering, fast shipping, and competent technical support keep elevators running β and minimize downtime. Key Features > Photo capture & upload β Photograph the door drive directly in the app and send the images to Langer+Laumann in seconds. No more back-and-forth via email. > Fast quote requests β Submit your modernization or replacement request with the relevant photos and details, so the right conversion package is identified quickly. > Quote management β View, track, and manage all your quotes in a clear, organized overview. Know the status of every request at any time. > Accept with a tap β Review and accept quotes directly in the app, so your order gets moving without delay. > Built-in approval workflows β Route requests through internal approvals before submission. A supervisor or back-office team member can review and confirm a request before it reaches Langer+Laumann β keeping your team aligned and preventing errors. > In-app messaging β Communicate directly with the Langer+Laumann team. Ask questions, clarify technical details, and receive answers without switching channels. > Full project history β Keep photos, quotes, messages, and approvals organized per elevator door drive, so nothing gets lost. Why Use the App When an elevator needs a door drive replacement, you don't want to wait. The Langer+Laumann app takes the effort out of the inquiry and quote process. Instead of phone calls, scattered emails, and unclear photo attachments, everything runs in a structured workflow β from the first photo to the accepted quote. Service technicians save time on-site. Back-office staff and supervisors stay in control through approval workflows. And because every quote, message, and photo stays in one place, your entire team works from the same information. Faster requests. Clear communication. Less downtime for your elevators. Download the Langer+Laumann app and modernize the way you order door drive conversion packages.
Screenshots
Verdict
The clearest difference is update cadence: L+L Direct at every 2 days against SLC Assist's every 4 months. SLC Assist's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SLC Assist ships an update every 4 months, L+L Direct every 2 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | SLC Assist | L+L Direct |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 2 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 β better | 15.6 |
| Further details β not scored | ||
| Size | 1 MB | 81 MB |
| Age rating | 4+ | 17+ |
| Developer | K.A. Schmersal GmbH & Co. KG. | Langer & Laumann IngenieurbΓΌro GmbH |
In-app purchases
SLC Assist
No in-app purchases
L+L Direct
No in-app purchases









