The Tap Ten

Get a nickname from connected Game Center.
When not connected Game Center, it will ask for your nickname for display on other devices. If omitted, the device name is assumed.
After that, it will automatically connect to a nearby iOS device running this app. No special operation is required to connect. You need to enable Bluetooth or/and WiFi on both devices.
At first, I am at the top and opponents line up below.
Tap the check mark at the bottom right to switch to the challenge screen.
You challenges the fastest ten taps.
Results are displayed in order of fastest time.
You can challenges again and again.
Tap the list icon at the bottom center to you can see leaderboard of Game Center.
When not connected Game Center, you can see the local results so far.