# Zimmatic Irrigation Calculator vs RiverFox

The clearest difference is update cadence: RiverFox at every 3 weeks against Zimmatic Irrigation Calculator's every 9 months. RiverFox also leads on iOS requirement (13.0 vs 15.0). 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.

Zimmatic Irrigation Calculator ships an update every 9 months, RiverFox every 3 weeks. The most recent releases landed on September 22, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Zimmatic Irrigation Calculator | RiverFox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zimmatic-irrigation-calculator/id1152640142/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 23 MB | 77 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lindsay Corporation](https://appshunter.io/developer/991860794) | [heliopas.ai GmbH](https://appshunter.io/developer/1497155208) |

## What reviewers say

### Zimmatic Irrigation Calculator

[App page](https://appshunter.io/ios/app/zimmatic-irrigation-calculator/id1152640142)

This tool simplifies pivot system design with essential calculations and unit conversions. It offers offline access to calculators for hydraulics, irrigation depth, friction loss, and more, supporting both metric and US units.

**Highlights:** Pivot system design calculations, Metric and US unit conversions, Hydraulics calculator, Friction loss calculator, Application rates calculator, Yield converter, Offline functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### RiverFox

[App page](https://appshunter.io/ios/app/riverfox-irrigation-planning/id1497155209)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Zimmatic Irrigation Calculator free?

Zimmatic Irrigation Calculator is free to download, with no in-app purchases.

### Is RiverFox free?

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

### Do Zimmatic Irrigation Calculator or RiverFox have ads?

Neither Zimmatic Irrigation Calculator nor RiverFox shows ads.

### Which is updated more often, Zimmatic Irrigation Calculator or RiverFox?

Zimmatic Irrigation Calculator ships an update every 9 months, and RiverFox every 3 weeks. Most recently, Zimmatic Irrigation Calculator was updated on September 22, 2026 and RiverFox on September 25, 2026.

---

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