Alerts
Tap the bell on any ride to watch it, then turn alerts on.
On iPhone, tap Share then “Add to Home Screen”, and open Queue Drops from there to turn alerts on.
Alert settings
Tell me when a queue drops by at least
…and only once it's down to
Always tell me when a queue gets down to
Watched rides can have their own drop and floor: tap the pencil next to a ride under “Watching”.