A calculator that thinks ahead. See your result live as you type, switch to full scientific mode in one tap, and keep every calculation in history — forever.
This is the same calculation engine powering our app — live preview, smart formatting, and instant results. No download required.
Your result updates on every single keystroke — before you ever press equals. Type your expression naturally and watch the answer appear instantly, with zero delay.
Full trigonometric functions, logarithms, factorials, roots, and mathematical constants — all one tap from the standard calculator, no switching screens.
Every calculation is saved automatically, grouped by date, and browsable anytime. Swipe down or tap the menu icon — your entire history is one gesture away.
No learning curve, no account needed, no ads. Just open the app and start calculating.
Enter any calculation using the standard keypad. Numbers, operators, parentheses, and functions all work naturally together.
As you type, your result appears instantly below the expression. No need to press equals — the answer is always visible.
Every calculation is saved automatically. Swipe down to browse, tap any past result to restore it, or clear with one tap.
No premium tier, no in-app purchases. Every feature listed here is available to every user, always.
Subtle, satisfying vibrations on every button press. Your phone confirms each tap so you always know your input registered.
Switch between degrees and radians instantly. Your current mode is always visible so you never get a wrong trig result by accident.
Unclosed parentheses are automatically balanced when you press equals. Focus on the math, not the syntax.
Large numbers are formatted with commas, and scientific notation kicks in automatically for very large or very small values.
Your last four calculations appear inline above the display — glance up to compare results without opening the full history panel.
The live preview is a game-changer. I use this for everything from splitting bills to double-checking engineering calculations at work. Fastest calculator I've ever used.
Finally a calculator that doesn't shove ads in my face or lock scientific mode behind a paywall. Clean design, works perfectly, completely free. Nothing else comes close.
The history feature alone makes this worth it. I do a lot of back-and-forth calculations and being able to tap a past result to restore it saves so much time every day.
Yes. 100% free. No in-app purchases, no premium tier, no subscription. Every feature — including scientific mode and full history — is available to every user at no cost, now and always.
No. Calculator has zero ads — no banners, no interstitials, no sponsored content. The entire experience is ad-free by design so you can focus entirely on your calculations.
Calculator is available on both Android (Google Play) and iOS (App Store). Both versions are feature-identical — everything you see on one platform is available on the other.
No. Your history is stored locally on your device only. We do not collect, transmit, or store your calculation data anywhere. Your math stays entirely private.
Scientific mode includes: sin, cos, tan (with inverses via 2nd mode), log (base 10), ln (natural log), √, x², xʸ, n! (factorial), and the constants π and e. Degree/radian toggle is also included.
Free on Android and iOS. No ads, no premium tier — just a great calculator.