Some iPhone owners may be surprised to hear that a random subset of Siri activations are sent to Apple for human analysis. The Guardian reported that Apple logs these Siri requests to improve Siri responses and dictation.
The Google app on the iPhone, iPad or iPod touch now wipes its own history clean. Users of Google's iOS app can set up automatic expiration of search activity and location history. When configured in settings, this private data will be deleted after a set period of time. Once the option is set, no further action is required to delete history information from Google.
Accumulating open tabs in Safari happens quickly on an iOS device. iPhone, iPad and iPod touch owners can easily watch the browser tabs pile up, unless they are manually closed one at a time. iOS 13 and later offers a way to keep Safari tabs under control automatically. Tabs can be set to expire after a certain time frame, which means they only stay open for a limited time.
There is really no way to block spam or robocalls on your iPhone. T-Mobile and Comcast have started rolling out a tool that will alert their subscibers if a call wasn't made by a human, and there is always the National Do Not Call Registry. However, these resources won't put an end to your phone being bombarded with spam calls.
Google has added new options to Google Account settings. While Location History and Web & App Activity can be toggled off completely, now they can be configured to automatically delete after 3 months or 18 months. Google will remove this history from your account on a rolling basis.