BTR: Begin Track Run

Marathon training is always about mathematics and discipline—there’s no room for guesswork. This app is built for those who have stopped relying on "intuitive running" and want raw facts, precise calculations, and a crystal-clear structure right on their phone, completely free from servers or subscriptions. It all begins with one specific goal: you select a race, set your target time, and the app breaks the distance down to its atomic parts. It calculates your VDOT, maps out your pace and heart rate zones, and builds a personalized training plan. Every session is more than just a run—it’s a structured breakdown of warm-ups, interval blocks, target paces, and cool-downs. You watch every completed session push your readiness percentage higher, while missed workouts or pace deviations instantly adjust your realistic race forecast. This is your operational tool and offline…