A quiet way to keep a list of facts in order: you place each item along a short walk, go through the stops, then test yourself and come back when a review is due.
Everything you build lives only on the device where you made it. There is no account and nothing is copied to a server, so walks and scores do not follow you to another phone or iPad. Deleting the app removes them as well.
Reminders are local notifications, and the app only asks for permission once you choose to turn them on. If you said no earlier, open the iOS Settings app, find Kesvane, and allow notifications. The home screen also shows which walks are due whenever you open it.
Not yet — the interface and the ready-made collections are in English only.