NexusCalc v3.1
The Calculator Built Like a Product.
Powered by the ULTRA CALC Engine v3.1 — 10,000+ lines of clean, unobfuscated source code. Desktop app + Mobile PWA. 37 operations across 7 polished pages. Yours forever — full IP transfer.
Not a template. Not a tutorial project. A finished, production-ready asset.
Features
Seven pages. One serious tool.
Every screen is fully built, themed, and tested. No half-finished prototypes.
Standard & Scientific
Full algebraic + scientific functions with proper operator precedence.
Expression Evaluator
Parse and evaluate complex math expressions with variable support.
Statistics (11 ops)
Mean, median, stddev, variance, percentiles — full statistical suite.
Unit Converter
19 categories: length, mass, temperature, energy, pressure, and more.
Finance
Loans, interest, ROI, mortgage calculations — production-ready formulas.
History
Persistent calculation log with search and export to JSON/CSV/LaTeX.
Memory Slots M0–M9
Ten independent memory registers — power-user workflow.
The Math
Rebuilding from scratch would cost 7–12× more in dev hours.
This isn't a template or a tutorial project. It's a finished, production-ready asset — polished, tested, and ready to ship under your brand today.
Live Demo
Touch the quality before you buy.
This is a stripped-down sample running the same design language as the full product. The real thing ships with scientific mode, expression parsing, statistics, units, and finance — all in the same polished feel.
- Custom UI, no Tk default look
- Smooth animations & theming
- Cross-platform: Windows / macOS / Linux
- Installable PWA on any phone
Screenshots
Built for desktop. Ready for mobile.
Who It's For
Built for people who ship.
Solo Founders
Skip months of engineering. Launch a polished calculator product under your brand this week.
Agencies
White-label it for clients. Resell it as a finished tool. Zero royalties, zero attribution.
Indie Devs
A clean, well-architected codebase to learn from, fork, or extend into your own SaaS.
A finished, production-ready asset.
- Full source code (10,000+ core lines, unobfuscated)
- 100% intellectual property transfer
- Rebrand, resell, modify — zero restrictions
- No royalties, no attribution required
- Desktop app (Python / Tkinter) — fully custom UI, dark & light themes, smooth animations
- Runs on Windows, macOS, and Linux
- Mobile PWA — offline-ready, installable, no framework, no build step
- ULTRA CALC Engine v3.1 — expression parser + plugin system + batch script runner
- JSON / CSV / LaTeX exporters built-in
- Full documentation + install guide
- Test suite included
Transparent, no surprises.
- No technical support after sale
- No future updates or patches
- No calls, Zoom, or meetings
- Text chat only — quick essentials
- One-time sale. Once sold, I walk away. The product is 100% yours — I won't resell or reuse it.
One-Time Price
Small reasonable negotiation welcome.
- Full source code delivered
- 100% IP rights transferred
- Resell / rebrand freely
- Zero existing customers attached
Serious buyers only — DM via Gumroad to proceed.
FAQ