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 5.1

- Performance and stability improvements for flawless work on iOS 11.

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

Customer Reviews

4.4 out of 5

26K Ratings

26K Ratings

Ads hijack RAM, useless for professionals

smashie sez

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.

No Longer Usable


I have used this app for years, and it was one of the first apps I downloaded after getting my first iPad long ago (why Apple iPhones have a native built in Calculator App but the iPad does not makes no sense to me, and I Love all things Apple). The ads before were annoying but the app was still usable. However now there are full screen ads that you cannot immediately exit to use calculator, which is beyond infuriating. I understand when that happens if I choose to watch a video ad while playing a game app in exchange for an in game reward, but being forced to watch a full screen ad video which prevents me from doing some math on the calculator when I need a quick answer is so annoying I immediately looked for an option to upgrade to remove ads (which actually doesn't upgrade THIS app it downloads the paid version [different app, different app icon, same developer]), then I deleted this "free" version. Just do yourself a favor and buy the paid version (which I really like and I paid $0.99 for USD) and don't bother with this "free" version which is no longer useful when you need the calculator to work at that moment.

Developer Response

Thank you for your feedback. We are sorry for the inconvenience and possible confusion with the free/paid version icons. Glad the problem was solved eventually. If you'll have any questions in future - please let us know in the comments or drop us a mail at support@apalon.com

Home Owner and business man and Owner


I use this apps for most of my calculations and it truly has been and awesome app and I will continue to use it for a very long time to come and my whole family use this app and they are very satisfied also. If they had more star I would choose every one of them. This app In my opinion is one of the very best app that I have and I hope they continue to be top rate. They truly have put together one of the very best . I give the folks that put this app together a 100% as the best of the best!!!!!!!!


IAC Search & Media Europe Ltd.
122.9 MB
Requires iOS 8.0 or later. Compatible with iPad.
English, Arabic, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish
Age Rating
Rated 4+
© 2014-2017 IAC Search & Media Technologies Limited


  • Family Sharing

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

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