The autonomous operations agent for independent gyms.

Every independent gym bleeds revenue through the same four holes.

Leads that never get a follow-up. Members who drift off before they cancel. Reviews nobody asks for. Hours lost to the same questions answered by hand. Owners can't afford an ops team, and the AI tools that exist are built for chains with tech departments.

The independent gym is unserved, and the technology just arrived.

The $200k to $800k, 1 to 5 location gym sits below every competitor's line. Keepme, Replify, FitHive, Loyalsnap, and ABC Fitness all chase chains and enterprise. Why now: reasoning models make a genuinely autonomous agent possible for the first time, and SMB owners are done buying tools they have to run themselves.

One agent. Four modules. It acts, then reports.

Cero OS™ answers leads, recovers cold ones, catches drifting members, and asks for reviews. The modules share one view of every member and lead, so nobody gets double-contacted. It acts on its own on known plays and escalates the judgment calls. Knowing when not to act is the point.

Built on the native agent infrastructure of the leading reasoning-model company.

Cero OS™ runs on Anthropic's tool-use agent pattern with Claude as the reasoning layer, a CRM-agnostic adapter so it sits on any gym's stack, and a thin integration layer for delivery. It is not a workflow template. It is a stateful agent.

$12,500 in year-one value per gym. It compounds.

The only MD-built, diagnostic-first agent in the category.

A doctor who ran a gym, selling a paid diagnostic before any install, with a mandatory monthly retainer. The diagnostic-first model builds trust competitors can't copy, and the MD plus ex-operator combination is empty in the space. Confirmed across YC, Athletech, HFA, and direct competitive scans.

Product built. Going to market now.

Cero OS™ is working software, not a deck. The first local outreach wave is live in South Florida, and the focus is closing the first paying gym. Pre-revenue, stated plainly. The asset is a built product and a category nobody else is serving.

Mauro Castillo. MD, MS, CSCS.

Medical doctor. Former gym owner. Strength coach. Built Cero OS™ solo. The same person who diagnoses the gym built the agent that fixes it.

The operating system for the independent gym. Then the block past it.

Start with gyms, where the four bleeds are sharpest and the founder knows the customer cold. The same holes exist in every local service business with members and leads. Cero OS™ is the wedge into the operations layer of the small business.