Autosuggest (also known as autocomplete) is available for DuckDuckGo across platforms, including our website, browser extensions, Android app and iOS app.
To be clear, we don't collect or share personal information and autosuggest does not impact that at all. We simply do not associate queries with personal information (e.g. IP addresses) and in fact don't store any of it at all so our autosuggest doesn't impact your privacy!
Prior versions on GitHub.