SUB.

Summary

SUB. is a running platform built for Hong Kong runners, combining pacing calculators, race search, weather forecasts, and club directories to help you hit Sub3, Sub330, Sub4 marathon targets.

What is SUB.?

SUB. is a free Hong Kong running community app that provides practical tools to plan training, discover races, and track weather. Whether you're a beginner or chasing a new PB, SUB. acts as your running partner to make training more structured.

Core Capabilities

• Marathon pacing calculator: enter target finish time, get instant per-km pace
• Hong Kong & overseas race calendar: 100+ events, save favorites
• Real-time running weather: 24/7 updates to pick optimal training windows
• Running club & group search: find teams that match your level
• Race result storage: log finish times and memories
• Dark mode: clearer interface for night runs

Pros

• Built for Hong Kong runners, clean and intuitive interface
• Completely free, all features available at no cost
• All-in-one platform: pacing, races, weather in one app
• Always current: race and weather data updated in real time
• Community connection: meet like-minded runners through clubs and groups

Positioning & best fit

SUB. is designed for Hong Kong-based runners, from beginners just starting out to advanced athletes chasing Sub3 or Sub4 breakthroughs. It suits anyone who needs systematic training tools, wants to enter local and overseas races, or hopes to join a running community.

• Marathon trainees: need precise pacing to hit time goals
• Race participants: want up-to-date Hong Kong and international event info
• Running beginners: looking for clubs and groups to train with peers
• Weather-conscious runners: require real-time forecasts to schedule workouts