Startup:

The app automatically begins searching for iSprint camera(s) as soon as it is opened.

The first time the app is used, a pop-up message will be displayed requesting permission to use Bluetooth. The App uses Bluetooth Low Energy (BLE) to connect and transfer information between your device and the camera(s).

Please ensure the camera(s) are powered on and close by in order to initiate a successful connection.

By default, the app will search for two cameras advertising the unique iSprint ID. When a camera is found, the app will automatically attempt to connect to the camera. Your device will pop-up a message asking to pair with the camera - please accept.

Note: The app will not attempt to connect to any Bluetooth devices other than those with the unique iSprint service ID.

Please refer to the labels on the above screenshot of the app interface:

A) Access the camera setting and statistics screen

B) Camera signal strength

C) Camera connect status: Green = Connected; Red = Disconnected. Tap to disconnect a connected camera.

D) Camera Status:

• Grey: Unitialized. Tap to start the initialization process (this performs some onboard tests of the iSprint camera).

• Yellow [Only applicable if there are 2 cameras]: Initialized but unsynchronized. The cameras must be synchronized to align their individual clocks to ensure accurate timing. Place the cameras a foot apart facing each other, so the cameras are aligned and pointing directly at one another. Tap to move into the synchronizing state.

• Orange [Only applicable if there are 2 cameras]: Ready to synchronize. While the camera's are facing each other (see step above), pass/swipe a pencil or twig rapidly between the cameras. The faster the better. Try ensure the pencil/twig is as vertical as possible as it passes between the camera lenses. The cameras will use the detected movement to synchronize their clocks. (This optical synchronization is a more accurate alternative to synchronizing by transmitting information between cameras, since any transmission will include latency).

• Blue: Successfully synchronized and ready to start measuring.

• Green: Actively monitoring to detect movement.

E) One or Two Cameras: By default the app assumes there will be two iSprint cameras. Use the slide to select only one camera if applicable.

F) Swap camera order: The app initially uses the order the cameras connect, then the order in which timestamps are sent in the "Single" measurement mode, to determine which camera is the start camera. There is a chance the order the app determines is incorrect (for example if the cameras are moved to measure a different segment). This button is to swap the order the app is using to calculate the elapsed time (i.e. which camera is sending the start time and which is sending the finish time). [This button is only applicable to Continuous measurement and Gate modes]

G) Received timestamp. If the cameras have been synchronized, this is the time since the synchronization event.

H) Calculated elapsed time. A value of "..." indicates the app is waiting for the second/finish timestamp to be received.

J) Save latest time to competitor. If the time is better than the personal best time (K) it will replace the previous personal best.

K) Competitor personal best

L) Difference between most recent recorded time and each competitor's personal best

M) Clear/Reset competitor personal best time

N) Competitor two letter identification

P) Measurement mode selected

• Single mode: A "once-off measurement". Both cameras are put into detection mode. The first camera to report a time is the designated start camera and the other the finish camera. Each camera resets back into to Ready/Standby mode after recording one movement.

• Continuous mode: Both cameras are put into continuous detection mode and will report times to the app as they are detected. The app uses the camera order determined in the "Single" mode to determine which camera is reporting start times and which is reporting finish times. Use the swap button (F) to swap this order if it is incorrect. Tap the button a second time to quit/exit Continuous mode.

• Gate mode: This is for mass starts and consists of a combination of Single mode for the start camera, and Continuous mode for the finish camera. The second/finish camera will continue monitoring for finishers until the mode is ended/exited by tapping the Gate mode button a second time.

Q) Recorded competitor times