The digitization trend poses the challenge to development engineers to design and program softwaresolutions compatible with different hardware platforms and operating systems in the shortest possible time. Thesedifferences are particularly prominent between Android and iOS mobile devices. For this reason, certain frameworksare created that enable the rapid creation of application software for different hardware platforms by writing onlyone code base. Applications created in this way are called hybrid applications. This paper was written to familiarizethe reader with the current possibilities of applying modern web technologies for the creation of hybrid mobileapplications. Through this paper, the principles of functioning of the Flutter working framework are presented to thereader, as well as the basics of the Dart programming language, used in the Flutter framework. The inner workingsconcepts of the Flutter framework are presented to the reader through practical examples of implementations of theapplication for purchasing and booking airplane tickets. The work also shows the internal system of widgets, whichare used to create parts of the graphical interface within the application, as well as parts of the code of the projectwritten in the Dart programming language.

In this paper a "Smart Home" solution is proposed in which power plugs in a remote room can be controlled by a smartwatch, an Android mobile device or a PHP web app. Communication between these devices takes place in real time via server using Node.js technology. An electrical circuit for determining current and voltage on the plugs via Arduino Wi-Fi module sends the measured values to the server, based on which the electrical energy consumption in each time interval can be determined. All the measured values are stored in MySQL database and used for creation of appropriate reports. Smartwatch app enables remote plugging and unplugging. In addition, the setting of limits for electrical energy consumption on each plug is enabled, as well as the power of the consumption device that can be plugged. Exceeding of the allowed values leads to the automatic unplugging.