Your settings, sensitivity, and training records are stored only on your device. SprayTrace has no user accounts and we do not collect or receive this data.
The free version shows ads through Google AdMob. To serve ads, Google's SDK may access your device's advertising identifier (IDFA) and similar data in line with Google's policies. On first launch we ask for your tracking permission (Apple's App Tracking Transparency); if you decline, ads are shown non-personalized. You can change this any time in iOS Settings › Privacy & Security › Tracking. In regions that require it (such as the EEA and UK), a consent prompt is shown before ads load.
Google's data practices are described at policies.google.com/privacy and policies.google.com/technologies/partner-sites.
SprayTrace Pro (a one-time purchase) removes all ads.
Other than the advertising described above, SprayTrace has no analytics and contacts no servers of ours.
Questions? Contact pinyinpals@gmail.com.