Brace the Swarm (BTS) will not access any locally stored data on your device. This includes contacts, phone history, messages or any other stored files or documents. BTS will also not track any personal data. Some data might be tracked by our ads provider if personalised tracking is not disabled on your device, such as your IP address and device identifier.
For more information about what exact data is stored by our ads provider, see their privacy policy linked below. Here you can also find more information about disabling personalised ads.
https://unity3d.com/legal/privacy-policy