diff --git a/backend/internal/http/router/handlers-mobile.go b/backend/internal/http/router/handlers-mobile.go
index fe8011b09..32e3ec814 100644
--- a/backend/internal/http/router/handlers-mobile.go
+++ b/backend/internal/http/router/handlers-mobile.go
@@ -147,6 +147,7 @@ func (e *Router) startSessionHandlerIOS(w http.ResponseWriter, r *http.Request)
 		BeaconSizeLimit: e.cfg.BeaconSizeLimit,
 		ImageQuality:    e.cfg.MobileQuality,
 		FrameRate:       e.cfg.MobileFps,
+		ProjectID:       strconv.FormatUint(uint64(p.ProjectID), 10),
 	}, startTime, r.URL.Path, 0)
 }
 
diff --git a/backend/internal/http/router/model.go b/backend/internal/http/router/model.go
index 905ccb5ef..e7f77c819 100644
--- a/backend/internal/http/router/model.go
+++ b/backend/internal/http/router/model.go
@@ -69,4 +69,5 @@ type StartIOSSessionResponse struct {
 	SessionID       string   `json:"sessionID"`
 	ImageQuality    string   `json:"quality"`
 	FrameRate       int      `json:"fps"`
+	ProjectID       string   `json:"projectID"`
 }