It adds. It subtracts. It multiplies. It divides.
Of course it does. We agree. That is exactly why we paid attention to doing the fundamentals properly.
Android & iPhone
Just a Calculator - That WorksAdds. Subtracts. Multiplies. Divides.
And gets it right.
Twelve-digit addition? Instant. Times tables? Covered. Division? Naturally. It is a calculator, after all.
At thirteen digits, scientific notation steps in and suddenly looks very serious.
+ − × ÷all four operations, naturally
12 digitsbig numbers, taken seriously
6 decimalseverything after the point, too
Offlinemath still works without a signal
1 + 1= 2
9 × 9= 81
100 ÷ 4= 25
Perfect score.It is a calculator, after all.
Seriously, a calculator
Proudly good at calculator things.
Addition, subtraction, multiplication, and division. They are so obvious that we decided to present them as headline features.
Addition, instantly.Up to 12 integer digits
At digit thirteen, scientific notation takes over the counting.
Subtract, and things get smaller.
100 − 1 is 99. Not glamorous, but getting it right is the job.
Times tables? Leave them to us.
9 × 9 is 81. Larger multiplication receives the same calm answer.
We divide, even when it gets awkward.
Show up to six decimal places, with your choice of precision and rounding.
No binary hand-waving.
Decimal arithmetic helps avoid familiar floating-point surprises in money calculations.
Tax, MCR, GT, and history too.
Save up to three tax rates and keep recent calculations on your device.
One more thing
It can also total your golf game.
The Japanese golf game known as “Olympic” works for a casual group of four or an event of up to 100, with invite QR codes, shared scores, and results images.
But the calculator still gets top billing.
And a little more
Thoughtful beyond the equals key.
Everyday math works offline
The calculator and on-device history work without an internet connection. With or without a signal, 1 + 1 remains 2.
Share results as an image
Turn a result into a clean image. Share not only the answer, but the evidence.
Sound and haptics, your way
Configure key sounds and vibration independently. In quiet places, it gets the answer silently.
An ad-free option
A one-time ¥200 purchase permanently removes ads and unlocks additional sounds. Event Plus is ¥200 per month in Japan and manages multiple weekend events in the same month. Local storefront prices apply in other countries and regions.
Questions or a problem?
Including your device, OS, app version, and steps to reproduce helps us investigate.