These are altered versions of the Android app. Warning: These often contain malware or spyware that can steal your personal data.
The free version of Flightradar24 is excellent, but it has limitations, such as ads and a lack of detailed aeronautical data. The Premium tiers (Silver, Gold, and Business) unlock: flight radar 24 premium account free exclusive
Flightradar24 Premium: How to Get Exclusive Features for Free These are altered versions of the Android app