Three modes, cleanly separated.
Basic, Scientific, Graphing — each mode has its own clearly legible keypad. Switch through a clean segmented control.
In focus · Numeris
Numeris
A precise calculator for daily work, study and engineering — with live LaTeX, symbolic derivatives up to 5th order, and 3D surface plots. Offline, no account, no tracking.
Functions that glow.
Plot, analyze, understand.
Math in three dimensions.
Two taps. One wow.
Derivatives? One tap.
Symbolic. Exact. Instant.
Formulas like on paper.
Write the way you think.
Scientific. When it counts.
Every function. One mode.
Nothing gets lost.
Every calculation. Always there.
Overview
A calculator. With intent.
Numeris runs offline, stores nothing in the cloud, and tracks nothing. Two free modes (Basic, Scientific) cover everyday use; the Graphing mode with 2D/3D plots and symbolic analysis is a one-time in-app purchase.
Features
What Numeris does — and why.
Every feature is a deliberate choice. Nothing exists to fill space.
Live LaTeX in real time.
Formulas are typeset as you type — as they would look on paper. No copy-paste acrobatics.
Symbolic derivatives.
Derivatives up to 5th order, computed exactly. Optionally plotted alongside the source function.
2D and 3D plots.
Single-variable functions as a classic plot; two-variable functions as an interactive 3D surface.
Full local history.
Every calculation stays in history, inspectable and re-runnable. All local — no cloud, no account.
Dynamic Type & OLED dark.
All font sizes respect the system setting. Dark mode tuned for OLED displays.
No telemetry.
Numeris collects no usage data. No analytics, no crash reports, no Crashlytics hooks.
One-time purchase. No subs.
Graphing is a one-time in-app purchase. No subscriptions, no growing prices. Fair to long-term users.
Numeris
Technical specs.
| Platform | iOS · Android |
|---|---|
| Languages | 20 languages · incl. EN, DE, FR, ES, IT, JA, ZH |
| Price | Basic & Scientific free · Graphing as a one-time in-app purchase |
| Data | On device · no transmission to Qorvano° |
| Ships | Spring 2026 |
FAQ
Common questions.
Does Numeris work without a network connection?
For everyday use, yes. All calculations, the full history and every setting live only on your device. No data is transmitted to Qorvano°. One exception: the one-time Graphing-mode in-app purchase runs through the App Store or Google Play — your identity is not passed on to us.
What does Numeris cost?
Basic and Scientific modes are permanently free. The Graphing mode (2D/3D plots, symbolic derivatives) is unlocked via a one-time in-app purchase. No subscription, no recurring fees.
Which devices does Numeris run on?
Numeris runs natively on iOS (iPhone and iPad) and Android (including tablets). The app is optimised for OLED displays, landscape use and Dynamic Type.
Is my history synced to the cloud?
No. Numeris keeps history strictly local. There is no cloud sync, no account system, and no way to move data off the device. This is deliberate — simplicity and confidentiality come first.
What permissions does Numeris request?
Numeris requests nothing beyond the minimum. No location, no contacts, no camera, no microphone. The in-app purchase is handled exclusively by Apple or Google.
Which languages does Numeris support?
Numeris is translated into 20 languages — including English, German, French, Spanish, Italian, Portuguese, Japanese, Korean, Chinese, Russian, Turkish, Arabic, Hindi, Dutch, Polish, Swedish, Danish, Norwegian, Finnish and Ukrainian.
Is a desktop version planned?
A macOS version is under evaluation. We start with mobile because that's where the everyday utility is — and because we'd rather serve one platform well than three halfway.
Is there an education licence?
We're preparing a reduced volume licence for schools and universities. Write to info@qorvano.com if interested — we'll reply personally.
Support
Questions about the app or the purchase?
If something doesn't work or you miss a feature, write to us. We reply personally, usually within a few business days.