Peak Window is a minimalist, science-first wellness tracker built around one simple idea: your body runs on rhythm. Instead of moralizing abstinence or encouraging excess, it helps you observe your own cycle by logging each "session" and visualizing a smooth, evidence-annotated curve inspired by small studies that observed a short-lived day-7 hormonal uptick and large cohort data linking regular ejaculation with better long-term prostate health. The app’s design is calm, data-driven, and private—dark backgrounds, mint accents, tabular numerals, and plain-language explanations like "illustrative only—based on small studies." Its branding rejects shame and hype alike, framing balance as self-knowledge: "Find your rhythm. Skip the extremes." The result feels more like a lab notebook for your energy and focus than a nofap app—measured, trustworthy, and quietly elegant.