170,000 downloads worldwide!

This is a totally easy-to-use calculator.
It has all the basic features you'd expect from a calculator, as well as additional useful functions like the ability to calculate sales tax and discounts.

* History Tape - Reuse answer with a single tap
* Equation
* Sales Tax Calculations - Multiple tax settings with swipe change
* Discount Calculations with percentage operator (e.g., 100 - 30% = 70)
* Precise Rounding Settings
* Multiple Color Themes
* Multiple Font Sizes and Type Faces
* Left and Right Arrow Cursor Key - easy-to-edit expression
* Share Expression and Answer with other apps
* Support iPad
* Support Slide Over and Split View of iPad (If available)
* Sound Effects

If you want to reuse or edit a equation in history, swipe left it to show menu. You can select multiple options. You can also show menu by touch and hold history.

We welcome your feedback.

This is the free version of the app. A paid version is also available.
Paid version doesn't show ad and has four tax keys. (Free version has two tax keys)

What’s New

Version 6.4.0

Thank you for using R&Q Calculator.
- Fixed minor bug
- Update internal libraries
we appreciate for your feedback.

Ratings and Reviews

4.8 out of 5
620 Ratings

620 Ratings

alfwy ,

Very Handy

Update to my review below. The more I use this calculator app the more useful I find it.

Previous review: This is a basic calculator, with a few extras. The history, being able to use the history results, and being able to send the history to ones email is most handy.

I've not had this app long, but it has become my go to calculator, except on the rare occasion when I need to use a scientific calculator. The simplicity of this app is what makes it so handy for 90% of what I need a calculator for, coupled with the history it is one of my most used apps.

c.wiggins ,

Almost perfect

Great calculator, way better than the standard iPhone calculator. I like how you can scroll up to see previous calculations, and how you can click to select previous answers to put into a new computation without having to type them. I do wish it had a date reference somewhere so I could look up something I added up last Tuesday, for example. I run into this issue a lot.

wluhan ,

Finally a calculator with a history panel right next to it!

Many calculator apps do not show your calculating history by default. You always have to push a button or two to view your previous history. I found this app’s interface more helpful, because it is easy to make a typo typing on a virtual keyoboard on your iPad or iPhone, and viewing what you have typed previously helps tremendously to eliminate any errors. Great app!

App Privacy

The developer, KinkumaDesign, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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