# NozzleCalc vs My RollTarp

The clearest difference is rating: NozzleCalc at 5.0 against My RollTarp's 3.1. NozzleCalc also leads on device support (3 vs 1) and iOS requirement (11.0 vs 18.0). My RollTarp's advantage is update cadence (every 4 months vs every 49 months) and ratings volume (7 vs 1). 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.

NozzleCalc holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: My RollTarp has 7 ratings behind it against 1, so its average is the more settled of the two.

NozzleCalc ships an update every 49 months, My RollTarp every 4 months. The most recent releases landed on October 10, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | NozzleCalc | My RollTarp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nozzlecalc/id794048259/reviews)** | [3.1 (7 ratings)](https://appshunter.io/ios/app/my-rolltarp/id1624722272/reviews) |
| Number of ratings | 1 | **7** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 49 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 13 MB | 21 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Greenleaf Technologies](https://appshunter.io/developer/794048262) | [GAMA Electronics, Inc.](https://appshunter.io/developer/1533842080) |

## What reviewers say

### NozzleCalc

[App page](https://appshunter.io/ios/app/nozzlecalc/id794048259)

Quickly calculate sprayer settings for specific nozzles on the go. Determine optimum droplet size and PSI for your applications. Includes a reference section and direct contact to support.

**Highlights:** Sprayer setting calculations, Droplet size determination, PSI calculation, Customizable application rate, speed, and spacing, Reference section, Direct contact to support

**Features:** macOS Compatibility

**In-app purchases:** none


### My RollTarp

[App page](https://appshunter.io/ios/app/my-rolltarp/id1624722272)

Control your electric tarp system remotely with this mobile application. Power your tarp up and down, and open or close it with a single touch, all from your smartphone up to 100 feet away.

**Highlights:** Bluetooth remote control, Power tarp up/down, One-touch open/close, Support for multiple phones, Up to 100 ft range

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NozzleCalc free?

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

### Is My RollTarp free?

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

### Which has better reviews, NozzleCalc or My RollTarp?

NozzleCalc is rated higher. NozzleCalc averages 5.0 out of 5 from 1 ratings, while My RollTarp averages 3.1 from 7 ratings.

### Do NozzleCalc or My RollTarp have ads?

Neither NozzleCalc nor My RollTarp shows ads.

### Which is updated more often, NozzleCalc or My RollTarp?

NozzleCalc ships an update every 49 months, and My RollTarp every 4 months. Most recently, NozzleCalc was updated on October 10, 2026 and My RollTarp on October 21, 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.*