# IFAS 4RS App

> IFAS 4RS App (iPhone/iPad app by IT UF-IFAS.)

- Source: https://appshunter.io/ios/app/ifas-4rs-app/id1032449740 (this page in markdown: same URL + `.md`)
- Developer: [IT UF-IFAS](https://appshunter.io/developer/668288740)
- Category: Education, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 14.0 · 3 MB
- Languages: English
- Released: 2016-06-06
- Data updated: 2026-05-16
- User reviews in markdown: https://appshunter.io/ios/app/ifas-4rs-app/id1032449740/reviews.md

## What is IFAS 4RS App?

Right Source, Right Rate, Right Time, Right Place nutrient management.  The UF/IFAS 4R app assists you in determine these critical components of nutrient management.  Based on user inputs, the app calculates fertilizer rate and allows the user to save the results.


## Version history (last 3 releases)

### 2.0.1 — 2023-03-25

Add a new plant category
Right time calculation changes depending on the choice of extractant

### 2.0 — 2020-09-09

Support agronomic crops

### 1.0 — 2016-06-06

This update is signed with Apple’s latest signing certificate. No new features are included.

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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 2026-05-16.*