# Growsafe Knapsack Spray Calc vs Arvida Maintenance Requests

The clearest difference is update cadence: Arvida Maintenance Requests at every 2 months against Growsafe Knapsack Spray Calc's every 92 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.

Growsafe Knapsack Spray Calc ships an update every 92 months, Arvida Maintenance Requests every 2 months. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Growsafe Knapsack Spray Calc | Arvida Maintenance Requests |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 92 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 19 MB | 11 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Groundtruth Limited](https://appshunter.io/developer/894469722) | [Urbanise.com](https://appshunter.io/developer/937926920) |

## What reviewers say

### 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


### Arvida Maintenance Requests

[App page](https://appshunter.io/ios/app/arvida-maintenance-requests/id6448710794)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Growsafe Knapsack Spray Calc free?

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

### Is Arvida Maintenance Requests free?

Arvida Maintenance Requests is free to download, with no in-app purchases.

### Do Growsafe Knapsack Spray Calc or Arvida Maintenance Requests have ads?

Neither Growsafe Knapsack Spray Calc nor Arvida Maintenance Requests shows ads.

### Which is updated more often, Growsafe Knapsack Spray Calc or Arvida Maintenance Requests?

Growsafe Knapsack Spray Calc ships an update every 92 months, and Arvida Maintenance Requests every 2 months. Most recently, Growsafe Knapsack Spray Calc was updated on November 2, 2026 and Arvida Maintenance Requests on October 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.*