Privacy policy
Last updated: October 3, 2026
MACH RUN is a household calculator. You type in names, dates, balances, income, and spending so the engine can project a MACH RUN. That is personal financial information. We treat it that way -- locked down.
What we collect
If you create an account: name, email address, password (stored hashed — we cannot read the password), and optional profile image if you sign in with Google, X, or Apple.
If you use MACH RUN: the plan you type — family names and birth dates, account balances, income stages, contributions, spending, retirement dates, and the OODA Financial Analysis generated from those numbers. If you subscribe: Stripe customer and subscription identifiers, not your full card number. Stripe processes the card.
If you ask OODA AI a question: that question and a compact snapshot of this MACH RUN are sent to xAI so the model can answer. We do not use those questions to train a public marketing list.
Standard technical logs (IP address, browser, pages loaded) to keep the site running and to debug failures.
How we use it
To run the calculator, save your MACH RUN across devices, sign you in, take payment for Unlimited, answer OODA AI questions you ask, and keep the service secure. We do not use your household numbers to advertise other people’s products to you.
The tech behind MACH RUN.com
The site is hosted by Vercel (AWS - Washington, D.C., USA). The database, including all plans and the numbers you typed, is stored in Neon (AWS - Virginia, USA). Payments are processed by Stripe. OODA AI questions go to xAI (thank you Elon). Email signup can use Cloudflare Turnstile to check that a person, not a script, is registering. Stripe and Turnstile do not receive your household balances. xAI receives only the question you ask and the compact snapshot described above, and no detailed MACH RUN information is fed back to xAI.
What we will not do
We will not spam you. We will not sell, rent, trade, or otherwise knowingly give your personal information, financial inputs, passwords, or email address to marketers, data brokers, or anyone else for their own use. We hate that, and we won’t do it.
We may share information only when: you ask us to (for example Stripe checkout); a processor must have it to run MACH RUN (hosting, database, authentication, payments, OODA AI); or the law requires it. Processors are not allowed to use your data for their own marketing.
Who sees the numbers
Your MACH RUN is secured to your login. Other MACH RUN users cannot see it. Data is encrypted in transit (HTTPS) and saved plans are encrypted at rest on the server.
Cookies and sign-in
We do not run advertising pixels or sell browsing history. MACH RUN uses cookies only to keep you signed in. These include the session cookie and a short-lived copy of that session. Apple, Google, and X sign-in also use a temporary cookie that is deleted when the login finishes. We do not use advertising cookies or sell cookie data. The calculator entries on this device are stored in your browser, not in a cookie. You can clear cookies in your browser. Clearing them signs you out.
Keeping it
We keep your account and saved MACH RUN while the account is open.
Security
Passwords are hashed. Traffic is encrypted in transit (HTTPS). Saved MACH RUNs are encrypted at rest. Optional .machrun backup files use a password only you know — we do not keep that password. No method is perfect. Do not reuse a bank password here. MACH RUN is a planning tool, not a bank, broker, or custodian. If we learn of a breach of account or plan data, we will email the account and update this page.
Children
MACH RUN is for adults. You may enter a child’s name and birth date as a dependent for VA or similar benefits. We do not knowingly create accounts for children under 13.
Your rights
You may ask to access, correct, or delete your information, and to receive a copy of your plan. We do not sell personal information. Deletion is through your account profile or directly to us by Contact from the account email. Backups may keep a copy for a limited time. We will not use that copy to restore an account you asked us to delete. Billing records stay as tax and payment rules require.
Financial responsibility disclaimer
MACH Run, the MACH OODA Financial Analysis, and OODA AI are for entertainment and illustration. They are not financial, tax, legal, or investment advice.
Changes
If this policy changes in a material way, we will update this page and the date above.