# MRTN Rate Calculator vs Crop Nutrient advisor

The clearest difference is iOS requirement: MRTN Rate Calculator at 10.0 against Crop Nutrient advisor's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MRTN Rate Calculator ships an update every 5 months, Crop Nutrient advisor every 3 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | MRTN Rate Calculator | Crop Nutrient advisor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mrtn-rate-calculator/id560788301/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 57 MB | 24 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [University of Illinois](https://appshunter.io/developer/422670617) | [Nutrient Tech](https://appshunter.io/developer/1809878225) |

## What reviewers say

### MRTN Rate Calculator

[App page](https://appshunter.io/ios/app/mrtn-rate-calculator/id560788301)

This utility calculates the optimal nitrogen fertilizer rate for crops based on agronomic research and current economic conditions. It provides a customized recommendation to maximize returns.

**Highlights:** Customized nitrogen rate recommendations, Combines agronomic research, Considers economic fluctuations, Maximizes return on investment

**In-app purchases:** none


### Crop Nutrient advisor

[App page](https://appshunter.io/ios/app/crop-nutrient-advisor/id1170816834)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MRTN Rate Calculator free?

MRTN Rate Calculator is free to download, with no in-app purchases.

### Is Crop Nutrient advisor free?

Crop Nutrient advisor is free to download, with no in-app purchases.

### Do MRTN Rate Calculator or Crop Nutrient advisor have ads?

Neither MRTN Rate Calculator nor Crop Nutrient advisor shows ads.

### Which is updated more often, MRTN Rate Calculator or Crop Nutrient advisor?

MRTN Rate Calculator ships an update every 5 months, and Crop Nutrient advisor every 3 months. Most recently, MRTN Rate Calculator was updated on November 1, 2026 and Crop Nutrient advisor on October 26, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*