In DuckDuckGo’s app it has a button to clear your tabs and history. In DuckDuckGo version 7.15.0 it added an option to clear it away automatically the next time the app restarts. It also added keyboard shortcuts for iPad users.
• You can now have your tabs and data cleared automatically. Go to settings to configure this feature.
• Support for external keyboards with a range of shortcuts. See the full list below.
• Support for international and emoji based URLs
• Bug fixes and improvements
• Cmd-T or Cmd-N to open a new tab
• Cmd-W to close tab
• Shift-Cmd-] and Shift-Cmd-[ or Ctrl-Tab and Ctrl-Shift-Tab to move to the next/previous tab
• Ctrl-Shift-\ or Cmd-Shift-\ to show all tabs
• Esc to cancel typing in the address bar OR close the tab switcher OR close the suggestions
• Enter to select the current tab and close the tab switcher
• Cmd-[ and Cmd-] or Cmd-Right Arrow and Cmd-Left Arrow to move back/forward
• Alt-Cmd-F to edit address field
• Up/Down Arrow to navigate auto complete suggestions and tabs in the tab-switcher
• Cmd-Alt-Backspace to quickly delete all your tabs and data