Living beings such as plants require a proper balance, especially of nutrients, for optimal growth. Essential nutrients are necessary for basic functions, and trace nutrients for the best health. Nutrient lock-out can occur when the pH is out of balance or when there is too much of a nutrient. Even if overdosing doesn't occur, nutrients can be wasted by adding too much solution per fertilizing cycle.

NPK Calculator is an app for optimizing the ratio of macronutrients and micronutrients in your fertilizer solution for use in hydroponics or soil. Our in-app database contains many simple and complex fertilizers in the market. Several nutrition programs by knowledge growers with long-term experience are available in preset tabs.

-Save money on fertilizer solution (up to 50%)
-Know the ratio of elements available in your solution
-Prevent fertilizer burns and nutrient lock-out
-Optimize nutrient uptake
-Bigger yields
-Larger flowers
-More essential oils

What’s New

Version 1.0

This app has been updated by Apple to use the latest Apple signing certificate.

Ratings and Reviews

3.0 out of 5
5 Ratings

5 Ratings

Bobbie669 ,

Amazing program

This is to prevent nutrient lock out and burn, you can use it to get your plants very happy. It took me a second to figure it out but the website pretty much explains everything. It's great to have on hand and was well worth it for me. 👌

iJoint ,

Many bugs and not working

Program is not working. When i add nutrition program is crash and close. Please update NPK Calculator

N_00_C ,

I want my money returned

This app has zero functionality. It only allows users to use from a hand selected list of crap from crap nutrient companies. Also, their support contact info is bunk. Mail delivery subsystem kicked back the email I sent. @Apple, this developer is a fraud and should be dealt with.

App Privacy

The developer, Anton Simonov, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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