Quartz Labs

Sportling: Workout Calendar

Check in workout days, decorate pixel sports rooms, and add countdown widgets.

I build apps while traveling,track my training,create tools for reading and focus,and enjoy building solo.

Plan sunrise, sunset, golden hour, moon phases, weather and sky alerts.

Log BJJ training, track your belt and get AI technique recommendations.

Quartz · Indie Developer

Tackling the small but obvious problems encountered in travel and daily life, I design and build unique digital products.

KP forecast, aurora alerts, 3D oval, solar wind and northern lights tracker.

Explore Korean seasonal food, 24 solar terms, traditions, and your food journal