Best sleep tracker for solo founders

The sleep tracking space has exploded to roughly 150+ consumer apps and wearables, but the vast majority target either casual fitness enthusiasts or clinical sleep disorder patients. The common failure pattern: most trackers dump raw data (sleep stages, heart rate variability, REM percentages) without connecting it to what founders actually care about—next-day performance, decision-making clarity, and recovery speed. The gap isn't in the hardware or data collection; it's in relevance and speed. A solo founder needs to know in 10 seconds whether they should push hard today or dial back, and whether last night's sleep was the limiting factor. Existing tools either oversimplify (just show a sleep score) or overwhelm with noise. The real opportunity is building context-aware sleep coaching that lives in the founder's existing workflow—Slack notifications at 6am with personalized recommendations, or one-sentence summaries linked to their calendar and task load. New entrants should focus on the correlation layer: connecting sleep quality directly to shipping velocity, meeting outcomes, or focus hours, then automating the feedback loop so the founder never has to open another app.