Supports iOS 9 and 10.
Prevent apps from appearing in Siri Suggestions. Configure in the Settings app (General → Spotlight Search → Hide Apps).
From my testings it seems to be like this:
- Hiding an app on iOS 9 results in another one appearing.
- Hiding an app on iOS 10 results in an empty slot. I've tried to force iOS to fill the slot with the next most used app, but didn't find a way. Feel free to make a pull request if you find a way.
Requested on reddit by /u/adamjaydee.