Three steps from camera to carb estimate:
Open the Scan tab and photograph your meal — or choose an image from your gallery.
CarbCam shows you carbs, kcal, fat, protein and FPU. Adjust if needed.
Tap Save. The entry is added to your history and optionally synced to Nightscout.
Settings → Feedback — your message goes directly to the developer.
Your feedback history is visible directly in the Feedback screen — with developer replies.