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Calculator Pro

by Apalon
Rated: All Ages
4.1 out of 5 stars  See all reviews (679 customer reviews)

Price: $2.99
Sold by: Amazon Digital Services, Inc.
Available instantly
Offers in-app purchases
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Latest Updates

What's new in version 2.2
  • Performance and stability improvements

Product Details

  • ASIN: B008I43DYU
  • Release Date: July 6, 2012
  • Rated: All Ages
  • Average Customer Review: 4.1 out of 5 stars  See all reviews (679 customer reviews)
  • Amazon Best Sellers Rank: #1,533 Paid in Appstore for Android (See Top 100 Paid in Appstore for Android)
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Product Features

  • 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
  • Memory buttons to help you out with complex calculations
  • Adjustable skins
  • Swipe to delete
  • Copy-paste support

Product Description

Calculator done the right way!

Calculator is designed for everyone looking for simplicity and functionality. You can enjoy using a standard calculator for basic operations or extend it into a scientific one for more complex calculations. Just tilt the device into landscape mode!

Whether you’re a diligent student, an accountant, a banking manager, a housewife in charge of the family finances or even a maths genius, this calc will save both your effort and time and let you calculate anything you need!

Now you can do any calculations on the go seamlessly!


By clicking to install this app you consent to the installation of this app and any updates or upgrades that are released. You understand and agree that this app (incl. any updates or upgrades) may (i) cause your device to automatically communicate with our servers to deliver the functionality described above and to make our products more efficient and effective, (ii) affect app-related preferences or data stored your device, and (iii) collect personal information to provide the features described above and as set out in our privacy policy. You can uninstall the app at any time. For assistance, please contact us at

IAC Search and Media Europe Ltd.
Unit 1, Digiweb Building
College Business and Technology Park
Blanchardstown North Road, Dublin 15 Ireland

Technical Details

  • Size: 9.2MB
  • Version: 2.2
  • Developed By: Apalon (Privacy Policy Click to see complete result in a new window)
  • Minimum Operating System: Android 2.3
  • Approximate Download Time: Less than 90 seconds

Customer Reviews

Most Helpful Customer Reviews
66 of 68 people found the following review helpful
Verified Purchase
Update June 29, 2014:

I have been advised by the developers that they have deleted the Adware, Flurry Analytics and permissions from this app. I have downloaded the app and retested it and now it is squeaky clean. I have raised my review from a 2 star to a 5 star as this is now a good calculator app with no Adware, no Analytics and no permissions required. I thank the developers for their work in doing this for the app and for the Amazon customers.

This is a lot of items combined into one program. Unfortunately it does not need a lot of them to be what it was intended to be, a scientific calculator. This app contains Amazon Mobile Ads which can collect personal data like your IP address, device information and sometimes location data if GPS is ever allowed in the permissions. It also collects this data when you touch the ad and visit the websites that it is showing you. It also is written to include Flurry Analytics which also tracks your use of the app and behavioral data.

Why a simple calculator contains adware is beyond me, especially when it is a paid app. Top that off with your phone status permission it just makes me nervous. The calculator part of the app is nice and from what I have tested it works well. I won't go into a lot of detail there as there are thousands of items that you could check to determine its accuracy. I like that it has Trig and Log functions built in

Overall the calculator looks like a 5 star product but with adware and Flurry built in along with a Privacy Policy that allows them to use and potentially share the data with third parties it makes me nervous. I will rate this as a 2 star app because of the Adware, permissions and Flurry Analytics.
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50 of 56 people found the following review helpful
2.0 out of 5 stars Why so many permissions for a calculator app? May 14, 2014
By Lemons?
Verified Purchase
It works without WiFi and has cute skins. I haven't even finished checking out all of the features because I'm hung up on all of the permissions. I'm questioning why a calculator app would need so many permissions?
For now I will give it 2 stars, due to excessive permissions. If it turns out that there's a good reason, I will update my review and give it more stars.
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51 of 58 people found the following review helpful
1.0 out of 5 stars full network access for a calculator? May 14, 2014
By Rob B
Verified Purchase
Why does a calculator need full network access? App description doesn't show that it is needed either until you go to download the app so that is also deceptive. If there is a valid reason fine but they don't explain because they don't even say it needs that permission is the description.

Please make sure you check ALL permissions when you download an app or developers like this one can slip nasty ones through on you.
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507 of 631 people found the following review helpful
5.0 out of 5 stars Great calculator for KF July 7, 2012
Verified Purchase
The calculator app I had previously didn't look that great on my Kindle Fire. Calculator Pro looks fantastic. Does what it's suppose to and includes 3 themes. The paper one is neat but I went with the default. If you're in the market for a calculator for your KF then look no further.
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64 of 78 people found the following review helpful
1.0 out of 5 stars Calculator Pro - buggy December 23, 2012
Verified Purchase
The basic functions (add, subtract, multiply and divide) appear to function properly.

The scientific functions, on the other hand, do not follow proper operator precedence. In addition, depending on what order you execute them, you get different results. For example, if you take the sine of 90 deg., the calculator properly returns an answer of 1. If you immediately follow that with the cosine of 90, you properly get 0. Take the sine of 90 again and this time, the calculator gives an answer of 0.

There are more instances of this than I can recount but the basic takeaway is that for anything except the most basic operations, this calculator is essentially useless. This applies to the Kindle Fire HD, and resetting the device did not help.
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21 of 24 people found the following review helpful
1.0 out of 5 stars Danger- not accurate September 18, 2013
Verified Purchase
Divide 20 by 144. It's answer is 1.388..... Not even close, right? Answer should be less than one. Perhaps this is a defect when dividing any lesser number by 144. But since 144 is a common number to use in the construction trades - the number of inches in 1 square foot- I'd say it is a major drawback - even tho' it becomes obvious it's simply displacing the decimal point. BUT- if you can't trust a calculator with basic math functions, why use it? And to have paid for it with $$, it becomes a full fledged ripoff. Nice looking interface with the large, albeit incorrect, numbers, though.
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368 of 474 people found the following review helpful
5.0 out of 5 stars Great Calculator! October 8, 2012
Verified Purchase
Everything you would expect and a great layout! If your looking for a regular or advanced calc. this is the app for you!
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25 of 30 people found the following review helpful
1.0 out of 5 stars Too big, too many privileges May 14, 2014
Verified Purchase
It wants access to phone ID, contacts, internet. I blocked all those and it crashed, so I was not able to test further. Uninstalled and would not recommend. I have a good RPN calculator, so this is not a loss.
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