# REI Beef — Rumen Efficiency Investigation

> Rumen Efficiency Investigation (iPhone/iPad app by Lallemand inc..)

- Source: https://appshunter.io/ios/app/rei-beef/id1344539528 (this page in markdown: same URL + `.md`)
- Developer: [Lallemand inc.](https://appshunter.io/developer/633615977)
- Category: Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 9.0 · 145 MB
- Released: 2018-08-05
- Data updated: 2026-05-16
- User reviews in markdown: https://appshunter.io/ios/app/rei-beef/id1344539528/reviews.md

## What is REI Beef?

Thanks to the Rumen Efficiency Audit Program, nutritionists and producers get a global picture of the herd at a given point in time and practical recommendations to optimize rumen efficiency (barn and herd management, nutrition, use of a rumen-specific live yeast like LEVUCELL SC). According to the diet profile, specific targets are defined to fit with the various modes of production. Therefore, by helping optimize rumen efficiency, this audit program can contribute to maximizing income over feed cost.

This program is based on the observation of a set of easily measurable parameters on-farm. For each of the criteria assessed, the program provides optimal targets and practical recommendations to achieve these targets.
 
This program is brought to you by Lallemand Forward: specifically chosen service solutions that enhance people, knowledge and production practices. At Lallemand Animal Nutrition, high-value is put on creating and maintaining strong customer relationships. Lallemand is raising the bar and setting new standards to benefit animals and create better customer experiences. Lallemand Forward represents our ideals while keeping an eye on the future.


## Version history (last 5 releases)

### 1.4.2 — 2020-07-01

- Fixed some issues in registration.
- Updated the contact email.

### 1.4.0 — 2020-04-15

- Updated French translations;
- Updated the language list in the registration form;
- Supported full screen of videos on tablets.

### 1.3.0 — 2020-03-19

Supported more accurate decimals to improve evaluations.

### 1.2.1 — 2020-02-12

- Users can now audit cattle that are fed with roughage based diets! New fields were added to provide more accurate evaluations in these conditions.
- French supported!

### 1.2.0 — 2020-02-12

- Users can now audit cattle that are fed with roughage based diets! New fields were added to provide more accurate evaluations in these conditions.
- French supported!

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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.*