Spotlight search on iOS 10 now recollects your past ventures. In the event that you tap the Spotlight search bar on your iPhone or iPad, you’ll see a rundown of searches you’ve performed. Here’s the manner by which to clear that rundown—or cover up it entirely.
To start with, open the Settings application on your iPhone or iPad and tap to General > Spotlight Search.
Debilitate the “Siri Suggestions” alternative here. This will hide Siri’s rundown of proposed appsas well, however it’s the best way to shroud your history.
On the off chance that you simply need to clear your history, you can turn “Siri Suggestions” off from here and promptly turn it directly back on. This will eradicate your history of past hunts, and Spotlight will start recalling your history without any preparation.
Any touchy ventures will disappear from your history and won’t show up on your Spotlight search screen—until you perform them once more.
It is highly unlikely to utilize Siri application suggestions while concealing your hunt history. Ideally, Apple will include this alternative in a future form of iOS.
Source: https://www.howtogeek.com/304536/how-to-disable-ios-10s-spotlight-search-history/