> To constantly listen for audio, process it, and upload the results would use so much data and battery that you'd notice. A few years ago I uninstalled the of

> To constantly listen for audio, process it, and upload the results would use so much data and battery that you'd notice. A few years ago I uninstalled the official facebook app because it was using all of my battery and a fair bit of data, even when I wasn't actively using it. The battery usage record in the settings indicated the facebook app was the cause. After removal it felt like I'd bought a new phone, everything was running so much faster. I recommended the change to friends who saw similar results. I don't know if it was maliciousness or incompetence behind the battery usage, but it would seem that you can get away with it largely unnoticed.