SpeedSense is a web platform that predicts 5G network performance and translates complex data into clear, actionable insights. Using machine learning trained on real-world data, it forecasts download speeds with 95% accuracy and explains the key factors behind each prediction in plain language. Users can upload network measurements and receive AI-generated quality reports with optimization recommendations. Built with FastAPI, XGBoost, SHAP, and GPT-4o, it bridges advanced AI and practical telecom decision-making.