# Growsafe Knapsack Spray Calc vs Jumpstash

The clearest difference is review sentiment: Jumpstash at 100% against Growsafe Knapsack Spray Calc's 0%. Jumpstash also leads on update cadence (every 2 weeks vs every 92 months) and device support (5 vs 3). Growsafe Knapsack Spray Calc's advantage is iOS requirement (12.0 vs 16.6). On price, ads, in-app purchases and monetization model 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, Jumpstash every 2 weeks. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Growsafe Knapsack Spray Calc | Jumpstash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/jumpstash/id1465670860/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 92 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 19 MB | 17 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Groundtruth Limited](https://appshunter.io/developer/894469722) | [Michael Mackintosh II](https://appshunter.io/developer/1281426136) |

## 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


### Jumpstash

[App page](https://appshunter.io/ios/app/jumpstash/id1465670860)

Securely store backup codes for your accounts in iCloud Keychain. Access them from any device logged into iCloud, ensuring you never lose access to your important services.

**Highlights:** Secure backup code storage, iCloud Keychain integration, Cross-device access, Account lockout prevention, Token generation backup

**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 Jumpstash free?

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

### Do Growsafe Knapsack Spray Calc or Jumpstash have ads?

Neither Growsafe Knapsack Spray Calc nor Jumpstash shows ads.

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

Growsafe Knapsack Spray Calc ships an update every 92 months, and Jumpstash every 2 weeks. Most recently, Growsafe Knapsack Spray Calc was updated on October 21, 2026 and Jumpstash on October 24, 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.*