Best study planner for bootstrapped startups

There are roughly 40-60 study planning tools on the market, but they cluster into two useless categories: feature-bloated apps aimed at students cramming for exams, or expensive B2B project management suites built for teams with budgets. The actual pain point for bootstrapped founders isn't scheduling study sessions—it's integrating learning time with execution time. They need something that treats knowledge acquisition as a shipping milestone, not a separate life domain. Most existing tools fail because they separate 'learning' from 'doing,' forcing founders to context-switch between Notion, Roam, Linear, and Slack. The real opportunity sits at the intersection: a minimal, focused tool that lets a solo founder batch learning tasks with project deadlines, track knowledge retention directly tied to product decisions, and export insights into action items without manual overhead. A new entrant should obsess over integration—not with 47 apps, but deeply with the 3-4 tools bootstrappers actually use daily (GitHub, Slack, email). Skip mobile. Skip social features. Build for macOS and web, optimize for keyboard speed, and charge a tiny flat fee ($5-15/month) that feels insulting to ignore rather than a 'nice to have.' The winner won't be the prettiest or the most feature-rich; it'll be the one that saves a founder 90 seconds per day.