Selfhosted

It's any of their products that utilize their app or web servers to work. Here's their ToS, and below is a snippet:

Automated Processes and Artificial Intelligence This mobile app may use automated processes and artificial intelligence (AI) to provide you with personalized features and recommendations. We collect and process your data, such as your preferences, behavior, and feedback, to improve our app and deliver better services to you. We respect your privacy and we are committed to protecting your personal information. You can review our full privacy policy here: https://my.leviton.com/home/privacy. By using this app, you consent to our use of AI and data processing as described in our privacy policy.

And their privacy policy:

2. INFORMATION WE COLLECT AND HOW WE USE IT

Leviton collects information you provide as users who access the App, register for accounts, use the App, or request information as well as data from Leviton Product(s) once it is registered with a valid account on the App. Information is collected on an ongoing basis and when you access information using the App, which then accesses one or more Leviton or third-party servers. Leviton works with third party analytics companies (such as Adobe Analytics) to aid and improve the App’s functionality, and who may use technology to automatically collect the types of data listed below. Such data may be collected, analyzed and used for the following purposes: i) to enable you to access and use the App and connected Leviton Products and services,(i.e. account registration and management) ii) to operate and optimize the App and the user experience, iii) to send administrative information to you (i.e. updates to this policy), iv) to identify usage trends and to evaluate and create improved and more advanced features for the Apps and connected Leviton Products and services, v) to tailor marketing efforts and the like vi) to protect our App, Leviton Products, and Services, and/or vii) to comply with legal or regulatory requirements. Your information may be shared with third parties, such as service providers, in limited circumstances, as described below.

User Data. Set-up information you provide, including email address, name, address or coordinates (the location of your Leviton Products). Biometric data, such as images, may be collected if videos or images are provided to Leviton, i.e. as required for customer service support. Usernames, phone numbers, contact preferences and authentication data. Usage Details. When you access and use the App, certain details of your access to and use of the App, including the resources that you access and use on or through the App may be automatically collected, including: direct adjustments to the Leviton products using the App, technical information from the Leviton products (to improve your experience over time and help troubleshoot issues), electricity usage, capacity, and power information (every time a Leviton Product is turned on or off, the App records the time and duration to offer features in usage history), current status of the Leviton Product, and usage schedules, among other related data necessary for the functionality of the device. Mobile Device Information. We may collect information about the mobile device from which you access the App, including the device's unique device identifier, IP address, operating system, browser type, mobile network information, the device's telephone number, in addition to the internet connection. Additionally, as needed from time to time, we may request access to certain features from your mobile device, including the microphone, camera, etc. Location Information. This App does not collect real-time information about the location of your mobile device, but it does collect environmental data (such as user location and Bluetooth-enabled device location) that supports certain Leviton Product features, e.g. Astronomical Clock) from the Leviton Products that are used with the App in real-time. App Usage. We collect the frequency of the App usage, frequency of individual features of the Leviton Products usage, and how features of the App and the related Leviton Products are used. Partner Data. Some of your information or data provided to third-party products and services that interface with the Leviton Products may also be provided to Leviton. We may also obtain information about you from joint partners, public databases and other third-parties. Web Server Logs. When you visit our App, we may track information through web server logs to better administer the App and analyze its usage. Examples of information we may track include but is not limited to your Internet Protocol address, the type of browser or mobile device you use, the number of links you click within the App, the geographical location from which you accessed the App, the date and time of your visit, and the name of your Internet service provider.

and section 3:

Leviton may share data with third party vendors, service providers, contractors, or agents. These may include affiliate marketing programs, cloud computing services, data analytics services, data storage service providers, performance monitoring and testing tools, web hosting service providers, and product engineering and design tools.