Calculator Pro+ for iPad 4+

Basic & Scientific Calculator

Apalon Apps

    • 4.4 • 61.6K Ratings
    • Free
    • Offers In-App Purchases

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:
California Privacy Notice:

What’s New

Version 5.22.1

- Performance and stability improvements.

Thank you for your continuous support and comments! Do not hesitate to share your feedback with us via

Ratings and Reviews

4.4 out of 5
61.6K Ratings

61.6K Ratings

Thi-cot ,

Full screen ads at the most annoying moment…

The app itself is great since Apple does not ship iPads with a calculator for an obscure reason but the ads are way too annoying! They pop at the most annoying moment, like in the middle of entering numbers and take the full screen and you must wait until the end of the ad to continue what you are doing…. Then you continue just to get another full screen ad 2 minutes later. As another user said, why don’t you block the ads to be only banners which do not impede the use of the app? I was ready to buy it and then I got 2 ads in less than a minutes right in the middle of a calculation… guys… seriously… that is a deal killer!

Developer Response ,

Hello! Thank you for your feedback and sorry for the inconvenience! You're using the app on a free basis and the sponsored ads allow you to enjoy the basic app functions at no cost at all. If you don't want to see the Ads you can purchase the Pro version. Hope for your consideration!

StuG1118 ,

Advertisements on this free version are appallingly irritating - do not install

I do not recall this app being this bad when I first installed it but over time, it seems to have grown much worse. The developers not only permit ads on the free version but allow ads that totally hijack the application that one cannot close or can only close with difficulty. You spend more time trying to figure out how to close the ads than actually using the calculator. I therefore consider this free version to be a scam and I will not install their paid version with no ads for that reason. Had they provided a free lite version and a more functional paid version, I would have been ready to upgrade this app to a version without ads., had the advertising on the free version been less intrusive and more easily closeable. However, I do not like being bent over in this manner to get me to to pay up for an upgrade, even though the paid version is cheap enough. Either the developers are not monitoring the ads, unlikely, or are actively collaborating to make the advertising to be this annoying in order to sell their paid version

I am surprised that Apple has even allowed the developers to get away with this and am considering a complaint to Apple about this! Would have given 0 stars had I had the ability to do so.

Developer Response ,

Thanks for your feedback. This functionality limitation in the app is compensated by the fact that it's free. It is only up to you to choose whether you want to upgrade the app to get rid of ads or continue to use it on a free basis. We hope for your understanding!

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.

In-App Purchases

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

App Privacy

The developer, Apalon Apps, 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 Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Purchases
  • Location
  • Identifiers
  • Usage Data

Data Linked to You

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

  • Purchases
  • Location
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

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

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