Every calculation, one app.
209 calculators with step-by-step solutions, interactive graphs and 3D — and it all works completely offline. Math, finance, physics, conversions, and far more.
A calculator that actually explains itself.
Not just answers — the working behind them, the shape of the function, and a tidy way to keep and share what you solved.
Step-by-step solutions
Watch each problem worked out line by line — the formula, the substitution, and every simplification — so you learn the method, not just the result.
Interactive graphs & 3D
Plot functions in 2D, rotate surfaces and vectors in 3D, then zoom and trace to read exact values right off the curve.
Export & share
Turn any solution — inputs, results, graph, and steps — into a clean image you can save or send in a single tap.
Works fully offline
No sign-in, no network, no tracking. Every calculator runs on your device and nothing you type ever leaves it.
Saved & favorites
Keep the results you'll need again and pin the tools you reach for most, so your go-to calculators are always one tap away.
Built to feel right
An exact-math parser (no rounding surprises), a fast custom keypad, dark by default, and a layout that adapts to any screen.
One app for every subject.
From homework to the job site — the calculators you actually use, grouped so you find them fast.
Answers, steps, and graphs — together.
Every calculator follows the same clear pattern: enter your values, read the result, expand the steps when you want the method, and view the graph when the problem has one. Consistent, quick, and easy to trust.
Unlock everything, your way.
The full app is generous for free. Go Pro for unlimited step-by-step solutions, graphs, export, and saving — on whichever plan fits you.
Monthly
- All Pro features
- Cancel anytime
- Try it month to month
Yearly
- Everything in Pro
- Best price over time
- One payment a year
Lifetime
- Pro forever
- No subscription
- Tied to your Google account
Prices shown are indicative and set in Google Play. Buy once and your Pro plan restores automatically after reinstalling or on any device signed into the same Google account.
Questions, answered.
Does it really work offline?
What's free, and what's Pro?
If I buy Pro and reinstall, do I keep it?
How do I cancel a subscription?
Which devices are supported?
Questions or feedback?
We read every message — bug reports, feature ideas, or anything about VectraCalc.
All-in-one calculator. Free to start.
Coming soon to Google Play. Add your calculators, keep them offline, and go Pro whenever you're ready.
Get it onGoogle Play