Among the new features in Codebook 3 is an option to enable anonymous statistics collection, which will help us to learn more about how Codebook is being used and improve the app. It's an opt-in feature, and you can disable it within the app's Settings at any time.
Codebook does not send stats in real-time as you use the app. Instead it maintains a queue of events that it flushes at randomized intervals.
Codebook will not attempt to send stats while there is no secure network connection. Statistics are only transmitted securely over HTTPS, with a pinned certificate, to help prevent another host from posing as our statistics service.