Comparison

NozzleCalc vs My RollTarp

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

NozzleCalc

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
Read full description

Now you can quickly calculate sprayer settings for TurboDrop and AirMix nozzles anywhere with the official Greenleaf Technologies Nozzle Calculator app. Determine optimum droplet size and PSI for all your applications on-the-go and spray with confidence. If you use Greenleaf Technologies spray nozzles for your applications this is the app you shouldn't be without! This is the simplest and most accurate nozzle calculator app for Greenleaf nozzles. See the droplet size each nozzle size generates at a variety of precise pressures. Customize by setting your application rate (gal/ac), speed (mph), spacing (inches), and flowrate (gal/min). The reference section provides additional product info and industry terminology. Speak directly to a knowledgeable Greenleaf Technologies representative with a touch with the autodial contact feature.

About

My RollTarp

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
Read full description

Sioux City Tarp is excited to bring you the FIRST-EVER Mobile App for Electric Tarp Systems. With My RollTarp, you have the ability to completely control and operate our patented LockDown Electric Tarp System right from your smartphone. Our powerful Bluetooth allows you to control your tarp system up to 100 feet from your trailer, giving you more freedom out in the field. Features Include: - Bluetooth range is approximately 50-100 ft - Power up & down from your phone - Open & close your tarp system with a single touch - Pair and use multiple phones for one trailer No need to keep tabs on both your phone and remote. With the My RollTarp App, you can operate everything right from your phone. Rest easy knowing you never have to worry about operating your Electric Tarp System, our control box still comes equipped with a backup remote and a switch right on the trailer.

Screenshots

NozzleCalc4 screens
My RollTarp4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
NozzleCalc versus My RollTarp: the parameters behind the verdict, then further details
ParameterNozzleCalcMy RollTarp
PriceFreeFree
Rating5.0 (1 ratings) — better3.1 (7 ratings)
Positive reviews—33.3% of reviews
Number of ratings17 — better
Update frequencyEvery 49 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS11.0 — better18.0
Further details — not scored
Size13 MB21 MB
Age rating4+4+
DeveloperGreenleaf TechnologiesGAMA Electronics, Inc.

Customer experience

NozzleCalc

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

My RollTarp

All ratings7 ratings
Positive57.1%
Neutral0.0%
Negative42.9%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

NozzleCalc

No in-app purchases

None

My RollTarp

No in-app purchases

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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