For Developers Shipping AI Features

Stop hardcoding math. Start shipping it.

TrueMath is a single API that gives your app deterministic, auditable calculation logic, without you ever writing, maintaining, or debugging another formula.

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YOUR INTEGRATION truemath-sdk · TypeScript
// One call. Any domain.
const result = await truemath
  .calculate({
    domain: "mortgage",
    prompt: userQuery,
    tenant: orgId
  });

// Returns: result +
// full audit trail.
The problem

Three ways calculation features quietly kill your roadmap.

Problem 01
LLMs hallucinate numbers
GPT gets the vibe right. It gets the math wrong. One wrong loan estimate, one incorrect tax figure, one hallucinated return projection, and you own the support ticket.
Problem 02
Hardcoded formulas rot
You ship a working formula. Six months later a product requirement changes, a regulation updates, or a client has a new edge case. Now it's a three-sprint refactor.
Problem 03
No audit trail, no enterprise deal
Your first enterprise prospect asks how you handle calculation traceability. "It's in the code" is not the answer they want. Deals stall. Procurement loops. Quarters slip.
The choice

How developers actually build calculation features.

Two paths. The first one looks faster on day one. The second one survives every conversation that follows: enterprise security review, compliance, the next product change, the next client.

Without TrueMath
With TrueMath
Math logic
Hardcoded or LLM-generated. Both drift. Both break. Both become your problem.
Defined once in plain language. Versioned. Governed. Never breaks silently.
Audit trail
Log the inputs. Hope that's enough. It isn't, not for enterprise, not for regulated verticals.
Every output carries provenance: formula, version, inputs, timestamp. Ready for procurement review.
Methodology changes
Find the formula in the codebase. Write tests. Stage the fix. Pray nothing downstream breaks.
Update the domain description. Version bumps automatically. Old calculations stay traceable.
Multi-tenant logic
A different formula per client means a different code path per client. Unscalable by sprint four.
Tenant-isolated domains. Each client gets their own methodology. One API call handles all of them.
Time to ship
Weeks to prototype. Months to harden. Quarters to pass enterprise security review.
Live in days. Audit trail, versioning, and tenant isolation ship with the first call.
What developers ship with TrueMath

Calculation features that don't quietly break.

Lending & Mortgage Apps
Loan calculators that don't lie
Repayment schedules, APR, affordability, debt-to-income. Deterministic to the cent, traceable to the formula.
"What's the monthly payment on a $420k loan at 6.8% over 30 years with 10% down?"
Wealth & Investment Platforms
Returns your users can trust
Portfolio projections, compound growth, scenario modelling. Auditable for compliance, explainable for users.
"How much will $50k grow at 7% annually over 20 years with $500/month contributions?"
Real Estate & PropTech
Deal math that closes deals
Cap rates, NOI, cash-on-cash returns, DSCR. Calculated correctly, versioned to your methodology.
"What's the cap rate on a $1.2M property with $84k annual NOI?"
Insurance & Risk Apps
Pricing without guessing
Premium calculations, risk-adjusted returns, coverage modelling. Governed logic your underwriters approve.
"Price a $500k term policy for a 38-year-old non-smoker over 20 years."
⚡ Right now
April 14, 2026. OpenAI acquires Hiro Finance. Native financial reasoning is now built into ChatGPT. That isn't a feature update. It's a new category of competitor for every app in your vertical. The apps that win the next eighteen months are the ones that can answer "how did you get that number?" The ones that can't will lose enterprise deals to the ones that can. EU AI Act enforcement starts August 2026. Explainability is now a legal requirement in high-risk systems, not a product differentiator.

Your calculation feature. Live this sprint.

Thirty minutes. We'll connect TrueMath to your use case, build a working domain from your requirements, and show you a real audit trail output. You leave with something you can demo, not a slide about what's possible.

Book a build session