"Advertising Data: Collected and disclosed to our Service Providers, Analytics Partners, and Advertising Partners to help us market our services... Whether the user began using the App (i.e., if the App was installed, an account created, first session started, or first trial or payment started) โ Hashed email address and name โ Device operating system โ Device ID if granted by user (opt-in for iOS, opt-out for Android) โ Service Providers โ Analytics Partners โ Advertising Partners."
Hallow shares advertising data including hashed email, name, device OS, and device ID with advertising partners and analytics partners. On Android, device ID sharing is opt-out rather than opt-in, meaning it's collected by default.