let’s dev GmbH & Co. KG - The brand for groundbreaking custom software let’s dev GmbH & Co. KG - The brand for groundbreaking custom software

The brand for groundbreaking
custom software

Pioneering. Experienced. Ever exploring.


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User Interface Design for Web and Mobile

let’s dev - The brand for groundbreaking custom software

User interface design or just interface design deals with the design of user interfaces between humans and computers (machines). The core tasks are the design of user interfaces and the optimization of the user experience. Furthermore, the conception of appealing design and the planning of comprehensible application architecture or information architecture should not be neglected either.

No matter for which platforms applications are developed - the user interface design is always of central importance. A consistent look & feel and a well thought-out interaction concept ensure a positive user experience. The user is our focus and therefore the user interface design and the user experience have a high priority for us. What we program and design is functional, pleasant to use and meets the expectations of the user - in other words, our mobile solutions have a high usability. Above all, however, we make apps look attractive and thus also convey an emotional experience that.

User Interface Design

Our services
at a glance

We program customized apps and advise our customers on all topics related to app development. Our services are perfectly coordinated and based on experience from national as well as international projects.

User Interface

User interface is the term used to describe the user interface at which a person interacts with a computer, machine or work device. The term is also often abbreviated as UI. User interface is often mentioned in connection with User Experience (UX). However, it should be noted that UX is primarily concerned with the user's experience in the application. The UI, on the other hand, describes the visual component by which the user operates the application.

With the help of the user interface, users can communicate with the computer and, for example, enter commands or information. A distinction can be made between different types of user interface. There is the well-known GUI, i.e. the graphical user interface. As mentioned before, these are visual interfaces that can be operated using a mouse or keyboard. TUI describe text user interface that are only controlled with the keyboard. In addition, there is the VUI, voice user interface. This gives the possibility to give commands to the computer by speech. This voice control could make it easier for visually impaired people to use computer applications. For experienced users there is also the possibility to communicate through the CLI, Command Line Interface.


According to the Duden dictionary, the term "design" refers to the functional shaping and resulting form of an object of utility. Accordingly, design not only creates an attractive appearance, but also pays particular attention to the demands of functionality.

A good design should always be oriented towards the people for whom it is being developed. The needs, requirements and interests of the target group should always be in focus, which makes a purpose-oriented approach possible. Sometimes in this point design differs from art.

Design is found in a wide variety of disciplines and we encounter it almost everywhere in everyday life. These are, for example, media, fashion or product design. In a technically oriented context, one encounters above all the terms software and user experience design.

We make it simple

Software makes life easier. It makes it easier to organize, communicate, work, sell, entertain. That's exactly what we do at let's dev: We transform complex topics and processes into direct, structured interaction. Because we combine a lot of experience with even more curiosity, we achieve trend-setting and high-quality results. This makes let's dev the brand for groundbreaking custom software.

Contact us!

2 Locations
Karlsruhe & Hamburg


let’s dev GmbH & Co. KG

Alter Schlachthof 33

76131 Karlsruhe

+49 721 26 67 65 0


let’s dev GmbH & Co. KG

Eimsbütteler Chaussee 21

20259 Hamburg

+49 40 60 77 922 0