i know percent 4+

Percentage Calculator

Dmitry Mashkin

Designed for iPad

    • 4.8 • 20 Ratings
    • Free
    • Offers In-App Purchases



Discover the ultimate convenience in percentage calculations with 'i know percent'. Our modern, sleek app is designed for instant and effortless calculations. With a minimalistic interface, we provide you a seamless experience without the clutter.

Navigate easily with our integrated help screens and master percentage applications in real-world scenarios.

Unleash the power of quick calculations with five types of percent functions:

1. Calculate the percentage increase/decrease from X to Y.
2. Determine what is X% of Y.
3. Add X% to Y swiftly.
4. Subtract X% from Y with ease.
5. Ascertain how X is what percent of Y.
6. We have added a cryptocurrency tracker (available to premium members).

But that's not all! We've added a simple yet effective currency converter to enhance your calculation arsenal.

Percentages are an integral part of our daily lives. Why not make them faster and more efficient? Simplify your calculations and enhance your productivity with 'i know percent'. Transform the way you work with numbers today!


- 1-month subscription for $0.39
- Payment will be charged to your iTunes account at confirmation of purchase.
- Subscriptions will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period.
- The account will be charged for renewal within 24-hours before the end of the current period, and identify the cost of the renewal.
- Your account will be following your plan, within 24 hours before the end of the current period.
- You can manage or turn off auto-renew in your Apple ID account settings any time after purchase.
- This price is for United States customers. Pricing in other countries may vary and actual charges may be converted to your local currency depending on the country of residence.

Privacy Policy —

Terms of Service —

What’s New

Version 3.1.71

- Bug Fixes and Performance Improvements

Ratings and Reviews

4.8 out of 5
20 Ratings

20 Ratings

Parag09 ,

Fine thing, but missing some points…

Add another function like “X is how many % of Y”… you have one function just opposite of this… but this is missing… add this one on next update….

Thanks for adding the asking…. :-)

Developer Response ,

Let's try to do it :)

Kirdetzoff ,

⭐️⭐️⭐️⭐️⭐️ + no ads!

Удивительная простая программа. Было бы неплохо добавить больше функциональных возможностей в будущем.

onekoolfella ,

Easy to use

Upon the suggestion of iReviews on YouTube I decided to give this app a try and it’s very easy to use.

Self explanatory but has a little (i) at the top for help. No ads and free is a definite plus. Great for shopping and to calculate the % of my raise at work.

I use this to calculate the percentage of my salary from last year to this year and compare the % with the rate of inflation.

Developer Response ,

Thank you for the kind words 😊

App Privacy

The developer, Dmitry Mashkin, 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 Not Collected

The developer does not collect any data from this app.

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


  • Family Sharing

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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