GrindSession is described as 'Focus timer for distraction-free deep work — pick a session length (15/25/50 min or custom), set an intention, and get a breathing warm-up before the countdown starts. After each session you rate focus level, mood, and project, building a local history with' and is an app. There are four alternatives to GrindSession for a variety of platforms, including iPhone, iPad, Mac, Linux and Web-based apps. The best GrindSession alternative is PomoTimer.io, which is free. Other great apps like GrindSession are Session - Pomodoro Timer, Be Focused and Sessions Timer.