Calculator‪´‬ 4+

Basic - Advanced - Scientific

Oval Software Oy

    • 4.5 • 292 Ratings
    • Free
    • Offers In-App Purchases


Stop your math time-wasting today with this app! Designed to help you zip through your daily math in a swift of your own unique style ;-)

* LOVED by thousands for its smart UI with Live results & Natural feel

Now featuring user-definable advanced Functions that you can Share easily with other Calculator users and optimizations with iPad multitasking, 3D Touch shortcuts, Expandable Widget, Spotlight searching of History + watchOS native App with haptic.

Calculator is super intelligent, multi-functional scientific calculator that makes doing math look like art. It has built-in on-screen timer, notif. center Widget, Custom Keyboard, many pre-set functions like Date-time and Base computations and limitless combination of colors, fonts, shapes and sizes.

It features standard basic & scientific calculator functions, history log, and an elegant user interface. The quick timer is designed to help your track remaining mins:secs whenever you are on schedule.

It is really clever.
It can do live math expressions: from the simplest like "1+2" to more advanced expressions like "3+(3x9(80+sin(90)))"

Advanced calculator.
By swiping left and right on the app, you can easily access over 50+ advanced math functions.

History log.
Calculator remembers what you have calculated. Swipe up, and you can see all your previous calculations.

Colorful Themes.
Limitless lovely themes for you to browse, including optional parallax background image of your choice!

Easy access.
Tap & Hold a math expression to edit it. Shake your device to undo
Tap & Hold a number key for smart parenthesis
Tap & Hold the decimal point for RANDOM decimal
Tap & Hold the “ans” key for answer history
Tap & Hold the “÷” key for 1/x
Tap & Hold the “-” key to negate

Text style Edit option for Expressions
Tapping sound options

An In-App purchase is ready if you decide to add the Converter and Basic Graphing!

Terms of Service & Privacy Policy:

Subscription Terms

The subscription auto-renews at the end of each term.
Payment will be charged to iTunes Account at confirmation of purchase.
The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.
Account will be charged for renewal within 24-hours prior to the end of the current period.
You may manage your subscription and turn off auto-renewal by going to your Account Settings after purchase.
Any unused portion of a free trial period will be forfeited if you purchase a subscription.
Instructions on how to cancel a subscription can be found at the following link:

What’s New

Version 3.6.3

Bug fixes & improvements

Ratings and Reviews

4.5 out of 5
292 Ratings

292 Ratings

I Use it daily ,

It’s all that I need

This is the best basic calculator I have found. It functions well and it shows the progression of your work, almost like an old fashioned calculator with a paper readout would do. The buttons are a good size, so not too many “big finger” issues, and they’re sensitive enough to not miss numbers as I input them.

Kop198123 ,

Used to be good

I downloaded this app years ago and it was my go to calculator. The other day I went to use it for a quick basic calculation and when I clicked the button the clear I got a pop up that this is a paid feature. The app now has several tiers of subscription and is basically unusable without a subscription. A subscription for a calculator...really? A paid calculator app-ok that I can understand but to pay a monthly fee. No thanks.
I was particularly upset because I have been using this app for years. I hate when companies take an existing product and customer and try to force them into paying more for something that that the customer is already used to using. Believe I paid 99 cents when I first downloaded this app but I may be wrong.
Go find another calc app that is free or simply a flat fee of $.99 or $4.99 there are literally hundreds of options.
I deleted the app and for me went back to apples calc For the basic needs I have.

Developer Response ,

Wish you contacted us so we could remedy your particular case. The app is still usable for basic use if you tap and hold the delete/backspace button to clear instead of the AC button. We had to change our pricing structure in order to continue providing the same quality user services and experience going forward. Thank you for your past patronage!

Anton31kah10 ,


This is what I've been looking for for months, expression editor with instant answer, simple UI, fast one, it also came with extra features like keyboard, widget, great settings, clipboard, and everything you need, I didn't even know how much this were important until I saw 'em here, BIG LOVE DEVELOPERS

In-App Purchases

Converter + Graphing
Converter + Graphing
Get all current & future features for good!

App Privacy

The developer, Oval Software Oy, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Purchases
  • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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