# TERRA Opis vs RiverFox

The clearest difference is update cadence: RiverFox at every 3 weeks against TERRA Opis's every 5 months. 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.

TERRA Opis ships an update every 5 months, RiverFox every 3 weeks. The most recent releases landed on October 1, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | TERRA Opis | RiverFox |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Size | 17 MB | 77 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Terra Water Systems Limited](https://appshunter.io/developer/1449885604) | [heliopas.ai GmbH](https://appshunter.io/developer/1497155208) |

## What reviewers say

### TERRA Opis

[App page](https://appshunter.io/ios/app/terra-opis/id1449885605)

**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 TERRA Opis free?

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

### Is RiverFox free?

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

### Do TERRA Opis or RiverFox have ads?

Neither TERRA Opis nor RiverFox shows ads.

### Which is updated more often, TERRA Opis or RiverFox?

TERRA Opis ships an update every 5 months, and RiverFox every 3 weeks. Most recently, TERRA Opis was updated on October 1, 2026 and RiverFox on September 25, 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.*