I would like to tell you about the delete your Web History in computer as well as Android app, as you want.

Here I am telling you about it, as you want;

Computer;
Delete items one at a time
Firstly Visit the Web & App Activity page.

You may be asked to sign in to your Google Account.

Check the box next to the item you want to delete.

You can delete an entire day of items by checking the box next to a date.

At the top of the page, touch Delete.

Delete all of your history
Firstly Visit the Web & App Activity page.

You may be asked to sign in to your Google Account.

In the top right corner, touch MenuMore > Delete > Advanced.

Touch All time > Remove > Delete.

Note:
If you want to delete items from a specific date, touch the calendar at the top of the page to find the date you want.


Android app;
Tip:
If you want to delete your recent searches under the search box, touch and hold the search you want to delete > OK.

The search will be deleted from the Google app and your Web & App Activity.

Delete items one at a time
In the Web & App Activity section of "Activity controls," touch Manage Activity.

You may be asked to sign in to your Google Account.


Check the box next to the item you want to delete.

You can delete an entire day of items by checking the box next to a date.

At the top of the page, touch Delete.

Delete all of your history
In the Web & App Activity section of "Actvity controls," touch Manage Activity.

You may be asked to sign in to your Google Account.

In the top right corner, touch MenuMore > Delete > Advanced.

Touch All time > Remove > Delete.

Note:
If you want to delete items from a specific date, touch the calendar at the top of the page to find the date you want.