Self hosted Matomo with rewrites so as to capture all JS-enabled visits. It doesn't integrate with Google Ads (so no GA segments as target within Ads), but it k

Self hosted Matomo with rewrites so as to capture all JS-enabled visits. It doesn't integrate with Google Ads (so no GA segments as target within Ads), but it keeps data private. This is kind of futile, though, since 80%+ of traffic is Chrome. For apps, just give in and use Firebase.