I-Sail is described as 'Improve your training and racing directly. Re-experience and analyze your tracks to see what really happened. Invite your peers to do the same and have this great learning experience' and is an app in the sport & health category. There are five alternatives to I-Sail for a variety of platforms, including Android, iPhone, Android Tablet, iPad and SaaS apps. The best I-Sail alternative is RaceQs, which is free. Other great apps like I-Sail are ProRegatta, KWINDOO, TracTrac and TackTracker.