# Fertilizer Calc App — Farm Calculator

> Farm calculator for precise crop fertilization needs and custom area unit conversions. (iPhone/iPad app by Alberto Giambone.)

- Source: https://appshunter.io/ios/app/fertilizer-calc-app/id1450299266 (this page in markdown: same URL + `.md`)
- Developer: [Alberto Giambone](https://appshunter.io/developer/1412648174)
- Category: Utilities, Productivity
- Price: Free with in-app purchases (on sale, was $1.99)
- Rating: 1.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 18 MB
- Languages: American English
- Released: 2019-01-27
- Data updated: 2026-06-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/fertilizer-calc-app/id1450299266/reviews.md

## What is Fertilizer Calc App?

Take control of every element of fertilization.

Add Fields -> Set Fertilization Target -> Add fertilization

you can take control of N, P, K, MG, CA. for every field,
setting the target and see how may Kg/Ha of every element your crops need.

You deserve a custom area unit? No problem!
just add your custom area unit in square meters (es. Acre = 4046)
and Fertilizer Calc does the conversione for you.
You can add multiple custom unit with pro membership.

## Key features

- Calculate N, P, K, MG, CA needs per field
- Set fertilization targets
- Determine Kg/Ha for each element
- Add custom area units
- Supports multiple custom units with Pro membership

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Custom Area Unit | $9.99 | per year |
| Custom Area Unit | $1.99 | per month |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/fertilizer-calc-app/id1450299266/reviews.md

### 1/5 — Units

*2023-12-29*

Wont let me change units in settings

**Developer response:** You can change the unit in settings and the value will change in *Calc* and back in settings the value will change. I will fix this in a few days, it’s only a delay in displaying the right value but didn’t compromise the right calculation. 
Thanks for the feedback 

Best 

Alberto

### 1/5 — No equivalencies….ha/kg only!

*2022-08-04*

It would seem pretty easy to have this calculator allow for other units

**Developer response:** Thanks for the feedback, I will add more unit in the next release at the end of August.

## Frequently asked questions about Fertilizer Calc App

### What is Fertilizer Calc App used for?

Fertilizer Calc App is a farm calculator designed to help you precisely determine the fertilization needs for your crops. It allows you to set targets for key nutrients like N, P, and K for each field and calculate the required application rates in Kg/Ha.

### Can Fertilizer Calc App handle custom area units?

Yes, Fertilizer Calc App supports custom area units. You can add your own units in square meters, and the app will perform the necessary conversions for your calculations. This feature is particularly useful for farmers working with non-standard land measurements.

### What nutrients can I track with Fertilizer Calc App?

You can take control of fertilization for essential nutrients including Nitrogen (N), Phosphorus (P), Potassium (K), Magnesium (MG), and Calcium (CA) for every field you manage within the app.

### How does Fertilizer Calc App handle custom area units with Pro membership?

With a Pro membership, Fertilizer Calc App allows you to add multiple custom area units. This provides greater flexibility in managing and calculating fertilization needs across diverse field sizes and measurement systems.

### What is the price of Fertilizer Calc App?

Fertilizer Calc App is available for free. However, it offers in-app purchases for additional features such as adding multiple custom area units, with subscription plans available for monthly and yearly access.

### What devices is Fertilizer Calc App compatible with?

Fertilizer Calc App is designed for Apple devices and is compatible with both iPhone and iPad.

### How often is Fertilizer Calc App updated?

The latest version of Fertilizer Calc App is 3.4.3, and it was last updated on July 18, 2025. This indicates a commitment to ongoing development and improvements.

### What is the age rating for Fertilizer Calc App?

Fertilizer Calc App has an age rating of 4+, making it suitable for a wide range of users, including younger individuals assisting with farm management tasks.

## Version history (last 5 releases)

### 3.4.3 — 2025-07-18

Under the hood improvements

### 3.4.2 — 2024-08-09

under the hood improvements.

### 3.4.1 — 2024-07-02

under the hood improvements.

### 3.4 — 2024-07-01

Under the hood improvements

### 3.3.1 — 2024-06-25

Bug fixes

## Apps similar to Fertilizer Calc App

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Simplify Fractions](https://appshunter.io/ios/app/simplify-fractions/id1569741008) | 4.3 (3) | Free | Utilities |
| [Crop Nutrient advisor](https://appshunter.io/ios/app/crop-nutrient-advisor/id1170816834) | — | Free | Utilities |
| [Soil Test Pro](https://appshunter.io/ios/app/soil-test-pro/id485742991) | 3.7 (14) | Free | Utilities |
| [BASF Agro Adviser](https://appshunter.io/ios/app/basf-agro-adviser/id1316177410) | 5.0 (1) | Free | Utilities |
| [next.calc: a modern calculator](https://appshunter.io/ios/app/nextcalc-a-modern-calculator/id1470313161) | 5.0 (29) | Free | Utilities |
| [NPKalc - Fertilizer Calculator](https://appshunter.io/ios/app/npkalc-fertilizer-calculator/id6497334549) | 4.1 (7) | Free | Utilities |

## More apps by Alberto Giambone

- [Calcolo Unità Concimazione](https://appshunter.io/ios/app/calcolo-unita-concimazione/id1424361544)
- [Site to App](https://appshunter.io/ios/app/site-to-app/id1465872221)
- [MyMoneyPig](https://appshunter.io/ios/app/mymoneypig/id1535452448)
- [Farmer Journal](https://appshunter.io/ios/app/farmer-journal/id1543853683)
- [JT Job Time](https://appshunter.io/ios/app/jt-job-time/id1550578868)

All apps by Alberto Giambone: https://appshunter.io/developer/1412648174

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*