Opening the iTunes Store.If iTunes doesn't open, click the iTunes application icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To download the free app PercentDiff - the Shaolo Percent and Percentage Calculator by Shaolo LLC, get iTunes now.

Already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download

PercentDiff - the Shaolo Percent and Percentage Calculator

By Shaolo LLC

This app is only available on the App Store for iOS devices.


If you think the app is anything less than 5 stars, we want to hear from you directly! Do you have something you would like us to add or a complaint? Please contact us via the About tab. We can't reply to reviews.

Follow us on twitter: shaolollc

We love user feedback, please keep sending us email (preferably with something in it. I get a lot of empty email!

PercentDiff is the original multi-result percent calculator application.

Using PercentDiff is incredibly easy. There are two tabs. One for two numbers, and one for a number and a percentage. Input your numbers on either tab and all values will be calculated.

The two modes currently available are:

A. % Change (Number 1 to Number 2)

This mode will calculate:
1. Percent increase
** This mode can also be used to calculate gross sales markup

2. Percent decrease
** This mode can also be used to calculate gross margin

3. Percent difference

4. Number 1 as a percent of Number 2

5. Number 2 as a percent of Number 1

B. % Of (Percent of number)

This mode will calculate:
1. Percent of X

2. X plus percent
** Can also be used to calculate markup on a product

3. X minus percent
** Can also be used to calculate markdown on a product

4. X as a percent of an original number

5. X as a percent increase of an original number

6. X as a percent decrease of an original number

We strive to make our apps as simple to use as possible.

Please FEEL FREE TO EMAIL US feedback. We would like to know how users interact with the app and how we can improve upon it.

What's New in Version 2.61

The one about the keyboard.

Some devices are not properly rendering the vibrancy in the keyboard blur view. The easiest way to fix this is to use the global tint color on the keyboard.

I'm still looking in to the idea of themes. If it's added, it will be an IAP.


iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPad Screenshot 1
iPad Screenshot 2
iPad Screenshot 3
iPad Screenshot 4
iPad Screenshot 5

Customer Reviews

So useful!!!!!!!

If it's possible to LOVE a calculator app, then that's how I describe my feelings about this app! It's so simple and incredibly useful - I use it all the time, even more than the "standard" calculator app. I wish there had been a % calculator like this many years ago. Any way you need to determine percentages, based on either 2 numbers, or 1 number and a known percentage, this app does it. You won't be disappointed with this app!

The review I gave. And I don't do many. 📱⌚️📲

What you like: I like from percent change ,to the percent of. Both are very helpful in the field for quick references.

What you don't like:nothing, but surprise me with something new would be great. But I will use and follow you guys regardless.

What you would like to request: a app for old and new versions of the iPad. Thanks. ( PLUS NO ADDS. ). 🤾🏾‍♂️ 🤸🏿‍♀️🇺🇸

All apps should be this intuitive

Just give it 2 numbers or a number and a percentage and it clearly displays all the various permutations of the 2 things you gave it. The best part is that the results happen instantly and all on the same screen! Very convenient. Well done!

PercentDiff - the Shaolo Percent and Percentage Calculator
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Productivity
  • Updated:
  • Version: 2.61
  • Size: 1.6 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions: