# ISI Sys vs Grazing App

The clearest difference is in-app purchases: ISI Sys at none against Grazing App's 9. ISI Sys also leads on update cadence (every 2 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Grazing App sells 9 in-app purchases, starting at $9.99 per month. ISI Sys asks for nothing beyond the download.

ISI Sys ships an update every 2 weeks, Grazing App every 2 months. The most recent releases landed on October 11, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | ISI Sys | Grazing App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Size | 142 MB | 74 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Intersoft](https://appshunter.io/developer/1480525187) | [Grazing manejo eficiente de pastagem](https://appshunter.io/developer/1692243828) |

## What reviewers say

### ISI Sys

[App page](https://appshunter.io/ios/app/isi-sys/id1628666266)

**Features:** Vision Pro support

**In-app purchases:** none


### Grazing App

[App page](https://appshunter.io/ios/app/grazing-app/id6450190582)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Até 25 Hectares | $9.99 | per month |
| Até 50 Hectares | $17.99 | per month |
| Até 100 Hectares | $29.99 | per month |
| Até 250 Hectares | $39.99 | per month |
| Até 200 Hectares | $49.99 | per month |
| Até 500 Hectares | $49.99 | per month |
| Até 1000 Hectares | $69.99 | per month |
| Acima de 1000 Hectares | $89.99 | per month |
| Até 2000 Hectares | $89.99 | per month |


## Frequently asked questions

### Is ISI Sys free?

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

### Is Grazing App free?

Grazing App is free to download, with in-app purchases available.

### Do ISI Sys or Grazing App have ads?

Neither ISI Sys nor Grazing App shows ads.

### Which is updated more often, ISI Sys or Grazing App?

ISI Sys ships an update every 2 weeks, and Grazing App every 2 months. Most recently, ISI Sys was updated on October 11, 2026 and Grazing App on September 30, 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.*