# feiffer grain vs IRIS Zeulab

The clearest difference is update cadence: feiffer grain at monthly against IRIS Zeulab's every 6 months. IRIS Zeulab's advantage is iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

feiffer grain ships an update monthly, IRIS Zeulab every 6 months. The most recent releases landed on September 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | feiffer grain | IRIS Zeulab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/feiffer-grain/id999108374/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | Free | — |
| Size | 7 MB | 32 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrea Feiffer](https://appshunter.io/developer/875043798) | [Andres Mena Tobar](https://appshunter.io/developer/1487763227) |

## What reviewers say

### feiffer grain

[App page](https://appshunter.io/ios/app/feiffer-grain/id999108374)

This application helps farmers accurately measure grain loss during combine harvesting. It calibrates loss control and optimizes combine harvester settings for all crops and configurations. Requires a specific loss control pan made by Feiffer Consult.

**Highlights:** Accurate grain loss measurement, Combine harvester calibration, Optimal combine adjustment, Universal tool for all crops, Calculates loss in %, bushel/acre, $/acre

**Features:** macOS Compatibility

**In-app purchases:** none


### IRIS Zeulab

[App page](https://appshunter.io/ios/app/iris-zeulab/id1534089871)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is feiffer grain free?

feiffer grain is free to download, with no in-app purchases.

### Is IRIS Zeulab free?

IRIS Zeulab is free to download, with no in-app purchases.

### Do feiffer grain or IRIS Zeulab have ads?

Neither feiffer grain nor IRIS Zeulab shows ads.

### Which is updated more often, feiffer grain or IRIS Zeulab?

feiffer grain ships an update monthly, and IRIS Zeulab every 6 months. Most recently, feiffer grain was updated on September 24, 2026 and IRIS Zeulab on October 14, 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.*