KartLine app analytics for July 19

KartLine is a lightweight karting companion designed for drivers who want a practical, private way to prepare for practice and remember what happened after each run. The app focuses on useful local tools instead of online services. Drivers can create a session plan with track name, kart number, target lap time, tire pressure, fuel notes, and personal goals. A manual lap timer records lap sets and saves them into a local history, where users can review fastest laps, averages, dates, kart numbers, and run notes. KartLine also includes a simple kart setup page for repeatable garage notes such as seat position, sprocket choice, tire pressure, axle setting, brake feel, and handling comments. A maintenance checklist helps users confirm basic preparation items before driving, while Track Notes captures braking markers, corner ideas, and setup observations for future sessions. All data is stored on the device with no account, network request, cloud sync, location tracking, payment, or advertising. The design is clean and direct, built around short forms, readable cards, and standard iOS navigation. KartLine is intended as a notebook and organizer only; drivers should always follow venue rules, staff instructions, and official safety requirements.