"Unity has collected some or all of the following information about your device: unique device identifiers (e.g., IDFV for iOS devices and Android ID for Android devices); IP address; country of install (mapped from IP address); device manufacturer and model platform type (iOS, Android, Mac, Windows, etc.) and the operating system and version running on your system or device; language; CPU information such as model, the number of CPUs present, frequency, and instruction set support flags; the graphics card type and vendor name; graphics card driver name and version (e.g., “nv4disp.dll 126.96.36.199”); which graphics API is in use (e.g., “OpenGL 2.1” or “Direct3D 9.0c”); amount of system and video RAM present; current screen resolution; version of the Unity Editor used to create the game; sensor flags (e.g., device support for gyroscope, touch pressure or accelerometer); application or bundle identification (“app ID”) of the game installed; unique advertising identifiers provided for iOS and Android devices (e.g., IDFA or Android Ad ID); and a checksum of all the data that gets sent to verify that it transmitted correctly." (source: https://unity3d.com/de/legal/privacy-policy)
In addition to that we are counting the visitors to our websites and the installations of our apps. We do the former without storing any of your personally identifiable data. For the latter we transfer a strong hash of your Identifier for Advertising (IDFA) to our servers upon the first start of our iOS apps, in case ad-tracking is not limited on your iOS device. If you are limiting ad-tracking, we don't use or transfer any of your personally identifiable data within our iOS apps.