Your visits are in your iCloud
Queue Drops keeps your visits in your own iCloud account, not on this server. Sign in with the Apple ID your iPhone uses to see them here; they're read straight from iCloud into this page.
Rides by attraction
Every visit, most ridden first. Hover or tap a bar for your queues on it.
Rides per visit
Visits
Your data
Your visits live in your iCloud account, and this page reads them from there in your browser; Queue Drops' server never receives them. It only answers how the park's queues went between two times, and keeps nothing. Delete visits in the app (My Rides, then Visits and Privacy), or remove all of them in your iPhone's Settings under your name, then iCloud.