KELVINby entropy
entropy cooling into form · click the fox

Your agents build, test and prove mobile apps on your machine.

Capsules in seconds, no VM. You watch live. Every session becomes reproducible evidence.

Download for macOSmacOS 14+ · Apple Silicon · Beta

Capsules in ~7 seconds

Disposable devices by cloning — no VM, no 100 GB downloads, no simulator windows popping up. Only the Kelvin window.

Agents, live

Claude, Codex or Cursor drive the device while you watch — Observe, Act, Verify, with every action on the record.

Proof, not promises

Deterministic replay with verified hashes. Video, navigable artifact and auditable session — published to Slack, Claude or Notion.