iPad Screenshots


A simple calculator for your iPad with unit & currency converter and multitasking mode. Get it now for free!

Calculator Pro main features:
- Basic calculator in Portrait Mode
- Scientific calculator in Landscape Mode
- Universal converter for Currency, Length, Time, Weight, Pressure, Temperature, Fuel Consumption, Speed and many more categories
- Multitasking mode: use Calculator Pro and any other app simultaneously

Calculator Pro+ for iPad is designed for everyone looking for simplicity and functionality. Enjoy basic calculations in Portrait Mode with big handy buttons, or make complex calculations in scientific calculator, available in Landscape Mode. Calculator Pro is the only one calculator needed for math classes from primary school through college. The app is great in basic everyday calculations and solving complex problems in physics, astronomy or chemistry as well.

Need to convert one unit to another? With the intuitive and beautifully designed converter, you can easily switch between currencies, temperatures, length, speed and other numerous units, and continue calculation without interruptions.


• Two modes are available: do basic calculations in Portrait Mode or go advanced in Landscape Mode
• Degrees and Radians calculations
• History Bar: see your full calculation history directly on the screen
• Track Calculations History: view, save, delete selected equation or clear all
• Universal converter with 19 categories, including Currency, Length, Time, Weight, Pressure, Temperature, Area, Data Size, Energy, Force, Frequency, Power, Acceleration, Density, Angle, Typography, Volume, Fuel Consumption and Speed
• Handy text search to find categories and units instantly
• Multitasking mode: bring in Calculator Pro while viewing web pages, photos, taking notes and more to get results instantly!
• Calculator Pro is now accessible via VoiceOver as well
• Smart Keyboard support: take full advantage of seamless and intuitive calculations on your iPad Pro
• Pick the look from a bunch of skins to suit your own preference (Modern, Rose, Wood, Old, Doodle, Minimalistic, Zombie, Yellow, New Year)
• Memory buttons to help you out with complex calculations
• Accidentally input the wrong number? Just swipe with your finger to edit it!
• Copy and paste results and expressions directly into the current calculation
• Comment on the equation and send the calculation results with comments via email

Now you can do calculations on the go seamlessly!

For complete access to all Calculator Pro+ for iPad features, you will need to allow access to the following:
*Location data - this will enable automatic currency selection in the Converter.

Privacy Policy: http://apalon.com/privacy_policy.html
EULA: http://www.apalon.com/terms_of_use.html
AdChoices: http://www.apalon.com/privacy_policy.html#4

What’s New

Version 5.7

- Performance and stability improvements for flawless work on iOS 13.

Thank you for your continued support and comments submitted by email! Don't hesitate to share your impressions and feedback with us via support@apalon.com

Ratings and Reviews

4.5 out of 5
46.4K Ratings

46.4K Ratings

SCG421 ,

Calculator With Ads. LOTS of ads.

Yeah, it’s a calculator and has scientific modes and the ability to convert currencies. You have all kinds of nifty backgrounds to choose from. So that’s cool and I would give it a higher rating if I could just leave it at that. But it’s the ads. Yeah, I get it’s a free tool and you gotta pay your developers somehow. Why can’t there just be a perpetual banner at the top or at the bottom? I don’t have issue with the ads themselves, but I DO have issue with each ad taking up the entire screen. I happily use lots of free apps that have some sort of ad banner. But see, I can still *use* the app! Ya’ll are missing the point. I think it’s safe to say all the other users that have complained about the ads aren’t necessarily complaining that the ads exist. It’s how they’re presented and how it hinders the usability and, consequently, users’ satisfaction with the app.

Developer Response ,

Thank you for reaching out. It's important for us to know which advertisements are found annoying by our users. Could you please share screenshots of those to support@apalon.com ? Thank you so much in advance!

smashie sez ,

Ads hijack RAM, useless for professionals

I work in homes of clients doing construction and general contracting as well as on industrial job sites bidding big $$ jobs. I installed this calculator on my new iPad mini because I needed something on it to do little bids on this machine when I’m not using my iPad Air. Wow... it is garbage. Locks up after every keystroke because it’s trying to connect to its ad server, plays video ads constantly when connected to WiFi... I get thr need for a banner ad at the bottom that’s static (you did create the app for income, after all), but locking up because it’s priority is fetching ads before functionality of the app itself, where a dev thinks missing inputs from the client is acceptable while loading more ad banners instead of doing this function in the background... the dev obviously isn’t serious about the app and only cares about cranking in as much ad revenue as possible. If I was advertising online and saw my ad on your calculator I’d give my ad agency one chance to remove ads from crap programs like this or I’d fire them because the people who would be relevant customers would never use an app as broken as this, and I’d be wasting my PPI ad dollars on school children and people who didn’t have enough sense to check the App Store for any of the other 50 results for the search term “calculator” and download any other calculator app. At all.

Developer Response ,

These functionality limitations and ads in the app are compensated by the fact that it’s free. Please consider checking our portfolio for the applications with no ads that are available for download on different terms. Sorry for the inconvenience.

scotty321 ,

Best calculator app, but flawed

This is, by far, the #1 best calculator app in the App Store! It took us 9 years to find an app like this! This calculator app is incredible. It lets us copy and paste numbers from other apps, it works with iPad features such as SlideOver and split screen, it has built-in currency conversion, it can be used as a widget, it is blazingly fast to launch, it is easy to use, it is accurate, and it comes with some amazing skins! We love the high school sketchbook skin!! The only bug/problem with this app involves currency conversion. After we complete a currency conversion and we try to perform a math function on our newly-converted currency total, this calculator mistakenly REVERTS BACK TO THE OLD (PRE-CONVERTED) CURRENCY NUMBER for our math equation, which is very confusing and throws off all of our math functions. If someone isn’t paying very careful attention, they won’t even realize that they received the wrong total on this calculator. We have experienced many, many, many math mistakes because of this bug/problem with this app, and we only caught it a few times because we weren’t paying close enough attention. Once this bug/problem gets fixed, this app will deserve 5 stars.

Developer Response ,

We appreciate if you could contact our support service (support@apalon.com) with a more detailed description of the issue so that we could try to resolve it for you. Thank you in advance for your cooperation!

In-App Purchases

Calculator Pro for iPad Full
Get the full version with no ads!


IAC Search & Media Europe Ltd.
156.2 MB

Requires iOS 9.0 or later. Compatible with iPad.


English, Arabic, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish

Age Rating
In-App Purchases
  1. Calculator Pro for iPad Full $0.99


  • Family Sharing

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

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