Triangle AI Solutions

Turn your expertise into a subscription platform you own.

We design and build the free tool that draws your audience in, the course platform they join, and the billing that upgrades them the moment they pay. The same system runs Cardiac Codex.

Book a build callSee the Cardiac Codex build

The stack behind Cardiac Codex, live today

structured clinical lessons
177
board-style questions
2,200+
full-length timed mock exams
4

A funnel you own, from first click to paid subscription.

No page builders and no rented course platforms. Every stage runs inside one app built for you, on your own database. Try each stage below; nothing is saved or charged.

  1. Free tool, no login

    Mean arterial pressure

    Systolic120 mmHg
    Diastolic80 mmHg

    93

    mmHg MAP

    1

    A free tool that earns attention

    A calculator, simulator, or diagnostic anyone can use without logging in, built to rank in search and earn links from schools and industry sites.

  2. Your result

    MAP 93 mmHg

    jordan@example.com
    2

    An account to save their results

    Visitors sign up to save a score or unlock practice runs, and a welcome email goes out automatically.

  3. Your dashboard

    No saved results yet

    • 1. Pressure basicsFree
    • 2. Reading waveformsLocked
    • 3. Timed practice examLocked

    Subscribe to unlock lessons 2 and 3.

    3

    A free module inside the platform

    A sample lesson in the live dashboard, with upgrade prompts beside the lessons that are locked.

  4. Full access

    $39

    per month, cancel anytime

    Card ending 4242
    4

    Instant unlock at checkout

    Stripe takes payment and the account upgrades the moment it clears. Nobody has to flip a switch.

Built with Next.js, Stripe, and Resend.

Run your numbers

Move the sliders to project what the four stages could earn from the audience you already have.

Audience you can reach20,000

Email list, followers, members, or students

Monthly subscription price$39

Rates are planning assumptions, not guarantees. We set real targets from your audience data on the first call.

$2,808

a month from 72 subscribers at $39

  1. 1. Use your free tool

    20% of your audience try a calculator or quiz

    4,000

  2. 2. Create an account

    25% of those save their results

    1,000

  3. 3. Open a free module

    60% of those try a sample lesson

    600

  4. 4. Subscribe

    12% of those upgrade at checkout

    72

That covers a $12,500 platform build in about 6 months, after the $495 monthly plan.

72 subscribers, $2,808 a month

Cardiac Codex

Cardiac Codex is exam prep for the RCIS and RCES cardiovascular credentials. It runs on the same stack we build for clients: accounts, subscription billing, and a course and testing engine.

Visit cardiaccodex.com
structured clinical lessons
177
board-style questions
2,200+
full-length timed mock exams
4
credential exams covered
2
  • Domain competency tracking
  • Course and practice-test engine
  • Accounts and login
  • Stripe subscription billing

Three ways to start

Each build is a one-time fee plus a monthly plan.

  • Authority & Interactive Funnel Launchpad

    Start capturing leads with an interactive tool of your own.

    $4,500

    upfront, plus $295 a month

    • A fast custom website, built as a web app
    • One custom calculator or diagnostic tool
    • Sign-ups saved to your own database
    • Automatic emails when someone signs up
    Ask about this build

  • Most popular

    Turn-Key LMS & Subscription SaaS Portal

    Launch a complete subscription course platform.

    $12,500

    upfront, plus $495 a month

    • The Cardiac Codex platform, rebuilt for your subject
    • Accounts and login for your members
    • Stripe subscriptions that unlock access instantly
    • Your own course and practice-test engine
    • An analytics dashboard
    • Automatic emails
    • One free public calculator page
    Book a build call

  • Enterprise AI Ecosystem / JV Partner

    License, scale, or partner on an AI-driven platform.

    $22,000+

    or $3,500 setup, $500 a month, and a 15% revenue share

    • Licensing for multiple organizations on one platform
    • Custom AI tutor agents
    • A fractional CTO joint venture for credentialed educators with an existing audience
    Ask about this build

Tell us what you teach.

Bring your audience size and your subject. We’ll map the four stages with you and recommend where to start.

Book a build call

You’ll work directly with

John-Philip Maarschalk

RN, BSN, CNML

A healthcare leader over cardiovascular and procedural service lines who has stood up and run online businesses and the websites behind them.