Best freelance time tracking for solo founders

There are roughly 40-60 legitimate time tracking tools on the market, but the vast majority target agencies, dev teams, or corporate billing departments. The real gap isn't in the tracking itself—it's that solo founders need something that bridges three broken workflows: billable hours (for client work), internal projects (product dev, marketing), and personal time blocking (so you don't burn out). Most tools fail because they're either too aggressive (forcing detailed categorization that kills momentum) or too passive (generating data you never look at). The actual opportunity sits in the intersection of simplicity, context-switching forgiveness, and automation—a tool that starts the timer *for you* based on what you're actually working on (calendar, Slack status, open tabs) rather than demanding manual discipline. New entrants should focus obsessively on reducing friction in the first 30 seconds of use and building one killer feature (like AI-powered automatic categorization) rather than trying to compete on breadth. The founders who win here will be those who understand that solo builders hate process overhead more than they hate uncertainty.