Does your launcher report usage statistics and do you turn that off?
I use Nova free as my Android launcher, which has a setting for turning off "Error & Usage Reporting", which says it reports back: "Crashes, errors and general usage. Nothing personally identifiable or unrelated to Nova Launcher."
Q: Does your Android launcher also report usage statistics back to the mother ship?
Q: Can you turn those reports off, and do you turn them off on your launcher?