Zef can help you organise races with your friends, the principe is simple.

The start

Because Zef is referenced by spot, you have to choose a spot to create a race. In case the spot doesn't exist yet, just go exercising for an half hour on your spot and save your session. Zef automatically references it.
The number of spot icons indicates the number of races by spot.

To create or to play a race

There are public & private races, public races are visible to all Zef users and ranking is based on the best lap time.
With the Premium purchase, you can create public and private races. With a free account, you can only participate in exisiting races.
If you tap on "ranking", all ranked users are displayed.
If you tap on , the race is loaded and ready to be used for your next session.
If you tap on , Zef displays you all your racing sessions.
If you tap on race block you will view the race route.

To create a race

Select the "create" button and choose public or private race type, give it a name, then select the "done" button at the top right of the screen.
Long press on "map" 2 times to create the first racing element,and a start line will appear.
If you tap on , the buoys from the previous sessions of the same spot will appaear to guide you place your owm buoys.
Continue to place buoys by pressing long time on map.

The buoys

The buoy appears as a circle, and the goal is to shoot it.
The buoy turn is a triangle, just shoot the triangle in any direction.
Its clockwise orientation is a triangle, that has to be shooted in a clockwise direction at the top and bottom lines.
Its anticlockwise version is also a triangle, that has to be hit in an anriclockwise direction at the top and the bottom lines .
You can adjust the buoy rotation with the slider at the bottom of the creen.
To complete the race, forst you have to hit the buoys with in correct orientations, then you have to cross the finish line.

Editing a race

Here we go, save the race by taping on the "save" button at tthe op right of the screen.
You can edit your race by selecting the race elements on the right side of the screen.
The order of the racing buoys has to be respected to validate a lap.
Once you save the race, press on , the race will be loaded and ready to be played again in your next session.
Races can only be edited by there creators.

To run race with your iPhone

Once you select on , go to your profile and press on "add session". At the bottom appears your loaded race name, tap the "start" button & accept to play the race.
After this step the navigation view is displayed.

The first number is the current lap, the timer indicates your current timing on the lap.
is your current speed
is your VMG to the next buoy
is your distance to the next buoy to be reached
is your wind angle
is the next target to shoot
reset the current lap, so the next target becomes the start line

To navigate with your iPhone

The idea is that when the GPS will become accurate, Zef will try to orientate & to zoom the screen with your position & the next target to shoot.
An arrow will indicate the direction to take to reach the next target, as you approch the target, the arrow will become bigger & redder.
The arrow appears only in motion.

Play race with Apple watch

Once you tap on on your iPhone, open Zef on your watch.
At the bottom you will see your loaded race name, select the "start" button & accept to play the race.
After that the navigation view appears.

To navigate with your Apple watch

Is the currrent lap number
is your current speed
is your VMG to the next buoy
is your current lap time
is your distance to the next buoy to shoot
is your wind angle
is the next target to shoot
is the direction to the next target, it gets bigger & redder when you approch the target
When you shoot the start line, you can reset the lap by unlocking the screen and by scrolling down, then select the "reset lap" button.
If you don't shoot the first buoy, you can always shoot the start line to restart the lap.

Race Analysis

On your session, a Race tab will appear, your ranking in real time is displayed throughout the session.
Review all your laps.