Add a few names, tap the wheel, let it decide. On iPhone, iPad, Mac, Apple TV and Apple Watch.
Questions, bugs or ideas: open an issue. You will need a free GitHub account. Issues are read and replied to.
Yes. The winner is chosen the moment you spin, using the system random number generator, and the wheel then travels to that result. The animation cannot change the outcome — a dropped frame, a locked screen or a slow device makes no difference to who wins.
Yes. Every app works completely on its own and stores your wheels on the device. iCloud is only used to copy them between your own devices.
Tap Remove Winner on the result card. That is how you draw a running order rather than picking the same name twice.
Deleting the app removes the wheels stored on that device. To clear the copy held in your iCloud account, delete the app from every device signed in to that account.