2025-08-29 00:00:00 ZeF – The session tracker built by and for riders. From kitesurf to wingfoil, windsurf, pumpfoil, SUP foil or even wakeboard, ZeF helps you track your progress, analyze your performance, and relive your best moments. Whether you're on the ocean, lake, or training for your next competition — ZeF is your riding journal in your pocket.