# Zuuse OnSite vs Growsafe Knapsack Spray Calc

The clearest difference is update cadence: Zuuse OnSite at every 6 weeks against Growsafe Knapsack Spray Calc's every 92 months. Growsafe Knapsack Spray Calc's advantage is iOS requirement (12.0 vs 15.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

Zuuse OnSite ships an update every 6 weeks, Growsafe Knapsack Spray Calc every 92 months. The most recent releases landed on October 10, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Zuuse OnSite | Growsafe Knapsack Spray Calc |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 92 months |
| Monetization | Free | Free |
| Size | 61 MB | 19 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zuuse](https://appshunter.io/developer/898978463) | [Groundtruth Limited](https://appshunter.io/developer/894469722) |

## What reviewers say

### Zuuse OnSite

[App page](https://appshunter.io/ios/app/zuuse-onsite/id1121461067)

Manage facilities and work orders digitally in the field. This app allows maintenance teams to receive, accept, and complete tasks in real-time, reducing paperwork and improving response times. It synchronizes data with the core system for seamless updates.

**Highlights:** Receive and accept work orders, Record time and materials, Close out tasks digitally, Real-time information updates, Reduce administration time, Simplify record-keeping

**Features:** macOS Compatibility

**In-app purchases:** none


### Growsafe Knapsack Spray Calc

[App page](https://appshunter.io/ios/app/growsafe-knapsack-spray-calc/id1198797228)

Calculate the precise amount of agrichemical product needed for your spray tank to achieve a specific concentration. This tool simplifies complex calculations for agricultural applications.

**Highlights:** Calculate agrichemical product amounts, Achieve target spray concentrations, Simplify spray tank calculations, Designed for agricultural use

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Zuuse OnSite free?

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

### Is Growsafe Knapsack Spray Calc free?

Growsafe Knapsack Spray Calc is free to download, with no in-app purchases.

### Do Zuuse OnSite or Growsafe Knapsack Spray Calc have ads?

Neither Zuuse OnSite nor Growsafe Knapsack Spray Calc shows ads.

### Which is updated more often, Zuuse OnSite or Growsafe Knapsack Spray Calc?

Zuuse OnSite ships an update every 6 weeks, and Growsafe Knapsack Spray Calc every 92 months. Most recently, Zuuse OnSite was updated on October 10, 2026 and Growsafe Knapsack Spray Calc on October 21, 2026.

---

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