Currently accepting 4 buildouts per month · Next start: 1 week out
For Independent Gym Owners

Your gym is bleeding revenue you can't see.

You're answering the same six questions at 11 PM, covering shifts you shouldn't be, and forgetting to follow up with the lead from Tuesday. I get you 10+ hours back and recover at least $5,000 in dead leads in 30 days. If it doesn't work, full refund. You keep every system I built.

Built by an MD who ran a gym / Done in 30 days / Money back if it doesn't work
Run my Bleed Map
Built like medicine · MD-led · 30-day money-back guarantee
Diagnostic AI
Built for independent gym owners.
MD-led
Founded by a doctor who ran a gym.
Guaranteed
30-day money-back. Pay half on launch — only if it works.
01 · The 4 Bleeds

Four patterns drain every independent gym. Each one is a setup problem you can stop.

After mapping how independent gyms actually run, four patterns repeat. We call them the Four Bleeds. We list them in the order owners actually complain about them.

Time Bleed

Admin work that shouldn't be yours. DMs at 11 PM. Billing questions. Schedule shuffling. Captions you don't have time to write. The hours that vanish before you've coached a single class. 10–20 hours a week. Gone.

Member Bleed

The members who drift away without ever canceling. Attendance drops to once a week. Then nothing. The card still pays. The dashboard still says active. By the time you notice, they're already gone for good. In a 200-member gym, that's $160,000 in lifetime revenue walking out the back door each year.

Lead Bleed

The messages that disappear before you respond. The 9 PM message you saw at 7 AM. The voicemail nobody calls back. Industry data: 50% of gym leads never get a single follow-up. At $517 in lost lifetime value per missed lead, the average gym leaves $26,000 a year on the table.

Reputation Bleed

The reviews you never asked for. The content you don't have time to post. The Google ranking your competitor is winning by default. Gyms below 4.2 stars lose 38% of their click-to-call traffic.

You can't fix what you haven't measured. Run your Bleed Map and see exactly how much each one is costing you — in hours and in dollars.
Run my Bleed Map
02 — Built Like Medicine

Most AI agencies sell you features. Cero To AI finds the bleed first.

We diagnose before we prescribe. That's not marketing — it's how medicine works. You don't write a prescription before you take a history. You don't install AI before you measure what's broken.

Most gym owners we talk to have been pitched "AI agents" and "automation suites" and "workflow optimization platforms." They've bought tools that came with logins they never used. We don't sell software. We diagnose, build, and prove it works — or you don't pay.

Mauro Castillo, MD

Built by an MD who ran a gym.

Mauro Castillo · Founder, Cero To AI

I opened a gym in 2020. By 2022 I was first in, last out. Answering DMs at 11 PM. Missing calls during morning class. Forgetting to follow up with the lead from Tuesday.

I did what everyone told me to do. Hired a front desk person. Bought the software. I still drowned.

My team did their jobs. The software did its job. The pieces never connected. Every part of running a gym that should have been a system was being held together by my memory and my late nights.

I built Cero To AI to fix what I wish someone had fixed for me. So the next gym owner doesn't lose Saturdays to admin and Sundays to guilt.

  • Doctor of Medicine
  • Master of Science — Sports Training
  • CSCS — Certified Strength & Conditioning
  • Former gym owner (2020–2022)
03 — How It Works

Three steps. Thirty days. Then we step back.

Step 01

Diagnose

90-minute Bleed Map. We map exactly where your gym is bleeding hours and revenue. You get a written, MD-signed report in 24 hours or less — yours to keep, even if we never build a thing together.

$1,500
Step 02

Build

We install the 4 systems that stop the 4 Bleeds — Cero Front Desk™, Lead Recovery Engine™, Attendance Pulse™, Reputation Engine™. Custom to your gym. You don't touch a thing. No new logins. No new staff. Most builds wrap inside 30 days.

21–30 days
Step 03

Prove

We monitor for 30 days after launch. If you're not getting the hours back and the leads we promised, you get a 100% refund — and you keep every system I built.

Guaranteed
04 — Inside Your 30 Days

Day 0 you're drowning. Day 30 the systems run themselves.

Week 01 · Diagnose

Find the bleed.

90-minute Bleed Map. We map exactly where your gym is bleeding hours and leads. You get a written, MD-signed report in 24 hours or less — yours to keep, even if we never build a thing together.

Before: invisible hours leaking After: every leak named and quantified
Week 02 · Build

Stop the worst bleed.

Lead Recovery Engine™ goes live first. Every missed call, DM, or form fill gets a real response in under 60 seconds. Day or night. Speed-to-lead becomes seconds, not hours.

Before: 50% of leads never followed up After: every lead caught in under 60s
Week 03 · Expand

Catch the rest.

The other 3 systems come online. Cero Front Desk™ answers your most-asked questions 24/7. Attendance Pulse™ catches the silent breakup before the cancellation email lands. Reputation Engine™ asks for reviews at the right moments.

Before: you find out in the cancellation email After: you catch the drift before they go
Week 04 · Prove

Hand back your hours.

30-day monitoring. We track what's working. We adjust. If the hours and the $5,000 in dead leads don't come back — 100% refund, and you keep every system I built. Day 30 the build is done. Day 31 you're back on the floor.

Before: 50-hour weeks After: 10–20 hours back. Documented.
04 — The Systems

Each build stops one bleed. Here's what each one costs you to leave open.

Cero Front Desk™ handles your most-asked questions 24/7. Owners get 10+ hours a week back at the front desk. Built on 2026 models — it remembers what you said, hands off to a human when stuck, and sounds like your brand.

Stops Lead Bleed

Lead Recovery Engine™

Every missed call, DM, or form fill gets a real response in under 60 seconds. Day or night. Until they reply or book.

Stops Member Bleed

Attendance Pulse™

Members emotionally quit weeks before they cancel. The second attendance drops, they get a personal check-in. You catch the drift while you can still reach them.

Stops Reputation Bleed

Reputation Engine™

Members get an auto review request after a big win. Social content written from real gym data — workouts, member wins. You approve, it posts.

Every build is custom. Your Bleed Map tells us which to install first.

Plugs into your stack
Mindbody · Wodify · PushPress · Cal.com · Google Cal + many more
Done for you — you never log in
06 — The Guarantee

If it doesn't work, you don't pay. And you keep what I built.

30 Day Money Back

Get 10+ hours back and recover at least $5,000 in dead leads in 30 days — or get a 100% refund.

No hoops. No small print. No "performance reviews" stretched out 90 days while I extract retainers from your account.

If the numbers in your Bleed Map don't move by the end of Week 4, you get every dollar back.

And you keep every workflow, every agent, every system, and every dollar I recovered during the build.
07 — What This Costs

Pick the bleeds. Price builds from the systems that stop them.

Three line items. The diagnostic, the systems you actually need, and the 30-day install that puts them live. One scope, one fixed price, one guarantee.

How the price builds

Full stack value $12,700
01 The Bleed Map™
Paid diagnostic. 90 minutes. Written report with quantified dollar leak across all 4 Bleeds. Signed by Mauro Castillo, MD. Credits in full toward your install.
$1,500
02 · Pick your systems — à la carte per system
Cero Front Desk™
Stops Time Bleed · 24/7 AI receptionist trained on your gym's voice, hours, offers.
$3,500
Lead Recovery Engine™
Stops Lead Bleed · Sub-60s response on every missed call, DM, and form fill.
$2,000
Attendance Pulse™
Stops Member Bleed · Early-warning check-ins when a member's attendance drops.
$1,200
Reputation Engine™
Stops Reputation Bleed · Review requests triggered on member PRs and wins.
$800
03 · The 30-day install flat
Done-For-You Build, Launch & Prove
Diagnose · Build · Launch · Tune · Documented before/after report. Done in 30 days.
$3,700
Your investment $3,500 – $10,000
Bleed Map + 1–4 systems + Install · Scope-based
50% on signing · 50% on launch — only if it works.
A part-time front desk hire runs about $24,000/year. The Cero Buildout starts at $3,500, once.

P.S. Most gyms only need 1–2 systems on the first install. You don't pay for what you don't need.

06 — After Launch

A system is a vital sign. It needs to be checked.

After your 30-day build proves out, the systems get monitored, tuned, and re-diagnosed every month. Same logic as post-op care — the install is the procedure. Cero Care is the follow-up.

Cero Care™

Optional monthly retainer. Monitoring, tuning, and a fresh Bleed Map every 30 days — for every system you have running.

From $750 / month
  • Monitoring Daily uptime and call-quality review. Anomaly alerts when missed-call or response volumes spike.
  • Tuning Prompt and flow updates as your offers, hours, and staff change. One free system tweak per month.
  • Re-Diagnosis A fresh Bleed Map every 30 days. Dollar-recovery report on what each system saved you this month.
  • Quarterly call 60-min strategy session with Mauro on what's next to fix — and what to install when you're ready.
First 30 days included with every build · Cancel any time · No long-term contract
2 Spots Open · Q3 2026

Cero To AI is taking on 2 case-study gyms this quarter.

You get the full Buildout — free. We get a filmed case study, a short video review, and permission to use your numbers in our marketing. That's the trade.

This isn't charity. We need the proof to show the next 20 gym owners that this works. If that's worth it to you, apply below.

Apply for a case-study build →
07 — Questions Gym Owners Always Ask

The five questions every gym owner asks first.

What if I'm not technical at all? +
That's the point. You don't log into anything. You don't manage anything. We install it. We show you the dashboard once. You go back to running your gym.
I'm burned out. Will this actually help, or is it just another tool I'll abandon? +
Burnout in a gym owner comes from working hard with no path forward in sight. Cero To AI builds the path. The Bleed Map names every leak, in writing, signed by an MD. The 30-day build stops them. The goal is a gym that runs without you holding your breath.
I tried a chatbot once. My members hated it. +
That was a 2019 old menu-style bot. It got stuck on repeat when anyone asked anything off-menu, then dumped the conversation. Cero To AI builds with 2026 models. They remember what you said, they hand off to a human when stuck, they sound like your brand. Watch the Cero Front Desk demo above.
95% of AI pilots fail. Why is this different? +
Because 95% of AI pilots ship a tool and walk away. We diagnose first, build for what you actually need, monitor for 30 days, and don't get paid the second half if it doesn't work. That's the difference.
How long does this take? +
21–30 days from the Bleed Map to launch.
Do I need to buy new software? +
No. We work with whatever you're already using — Mindbody, Mariana Tek, Wodify, Trainerize, Glofox, Pike13. If you're not using anything, we'll tell you what's worth it.
What if it doesn't work for my gym? +
100% refund — and you keep every workflow, every agent, every system, and every dollar recovered during the build. The 10+ hours back and revenue recovery IS the guarantee. Either the install hits the numbers by end of Week 4, or it didn't work and you don't pay. No performance reviews stretched out 90 days.
What about after launch — do you disappear? +
30 days of monitoring is included with every build. After that, Cero Care™ is an optional monthly retainer for ongoing monitoring, tuning, and a fresh Bleed Map every 30 days. Most gyms keep it for the same reason they keep a CPA — systems shift, gyms shift, and small tunings protect the dollar recovery. Cancel any time. The systems stay yours either way.
Will my team hate it? +
Your team will love it. The system does the work nobody on staff wants to do.
Last Thing

You can keep answering the same 6 questions. Or you can have them answered for you.

The Bleed Map. 90 minutes with a doctor. A written diagnostic of every leak in your gym — quantified in dollars, signed by an MD. Credits in full toward your install.

Book my Bleed Map — $1,500
Run my Bleed Map →