A premium, fully offline calculation ledger for linear systems, matrix determinants, and vector logs — built for students, analysts, and engineers who want to verify the math by hand without ever touching a network.
Core instruments
Four tools, one ledger, zero servers. Every calculation happens on your device and stays there.
Enter coefficients for Ax + B = C and instantly balance the vectors to extract the exact coordinate of X, one step at a time.
Single unknownLog values into structured multi-cell modules and compute determinants by hand, without leaning on an automated external script.
Cell by cellKeep an organized local repository of every equation you've solved, and cross-reference past balance sheets whenever you need them.
Local repositoryFeel a crisp haptic pulse on every calculation execution and ledger wipe — clean, focused confirmation with no visual clutter.
Haptic responseLive instrument
Drag the coefficients below. The ledger balances Ax + B = C in real time and plots the line on the grid.
Plotter view — line traces C − A·X across the grid
About us
We are a small team of engineers, tutors, and lifelong equation-solvers who got tired of reaching for a calculator app that phones home before it can even show a determinant. OneX Math: Linear Solver began as an internal tool we built to check our own linear algebra homework, and it grew into something we wanted everyone to have.
Our mission is simple: give anyone who works with linear systems — students cramming for exams, analysts sanity-checking a model, engineers verifying a matrix by hand — a calculation ledger that respects their time and their privacy in equal measure. The tool you use to isolate a variable shouldn't need to know anything about you to do its job.
Inside you'll find a linear equation solver for balancing Ax + B = C, a determinant grid for logging matrix operations cell by cell, and a vector archive that keeps a running ledger of everything you've solved — all of it running locally, with no account, no internet connection, and no background tracking. The haptic tap you feel when you close an equation is confirmation the math happened right there on your device.
One unknown. One device. Zero compromises.
Privacy policy
Effective date: July 1, 2026
OneX Math: Linear Solver was built on one principle: your calculations are yours alone. This policy explains, plainly, what that means in practice.
We collect nothing. There is no account system, no sign-up screen, and no request for your name, email address, or location. The coefficients, constants, matrix values, and vector entries you type into the solver, determinant grid, or archive ledger are stored for your own reference only and are never transmitted anywhere. There is no analytics library, no crash-reporting tool, and no usage tracking of any kind built into the app.
Because nothing is collected, nothing is used, analyzed, or sold. Every feature — the equation solver, the determinant grid, the vector archive, and the haptic feedback — runs entirely through on-device computation, with no server-side processing and no profile built from your inputs.
Any equations, matrices, or vector logs you save are stored only in local storage on your own device. We do not operate cloud servers, we do not sync your ledger across devices, and we do not keep backups on our end. If your device is lost or reset, there is no copy of your data anywhere else, because one was never made.
This app does not integrate third-party analytics, advertising networks, or software development kits of any kind. There are no embedded trackers, no ad exchanges, and no external libraries phoning home. OneX Math: Linear Solver was designed to run entirely offline, and it does.
Because your calculation history never leaves your device, the strongest safeguard is architectural rather than procedural: there is no remote database to breach and no account credentials to steal. The app is kept lean and free of any permission it doesn't strictly need.
OneX Math: Linear Solver does not knowingly or unknowingly collect personal information from anyone, including children under the age of 13. With no account creation, no data submission, and no communication with external servers, the app is compliant with the spirit of the Children's Online Privacy Protection Act (COPPA) by design.
You are always in full control of your data. Since every equation, matrix, and vector entry lives only on your device, you can clear your history at any time from within the app, or remove everything permanently by uninstalling OneX Math: Linear Solver. There are no cloud backups, no linked accounts, and no copies retained by us.
We may update this Privacy Policy from time to time to reflect improvements to the app or changes in applicable law. Any revision will be posted on this page with an updated effective date. Because we hold no contact information for you, we're unable to notify you directly, so we encourage an occasional check back.
Questions about this policy, or about how OneX Math: Linear Solver handles — or, more precisely, doesn't handle — your data, can be sent to privacy@onexmathapp.com.
Contact us
Got a question about a calculation, a bug to report, or an idea for a feature we haven't thought of yet? We'd love to hear from you — whether it's feedback on the solver, a partnership idea, or a case where the numbers didn't line up the way you expected.
⏱️ We typically reply within 24–48 hours.