J4 Labs
**with my own ideas and learnings, and some help from both carbon and silicon intelligence
App · August 30, 2026
Types of civilizations by how much energy they can use from one planet, one star, or one whole galaxy with Sagan’s and Kardashev’s watt lines and what each step still needs.
App · August 29, 2026
A weather calendar from a pencil sketch: live clock, month chips, and a high in °F on every day.