Comparison

Roll Calculator vs Nix Toolkit

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

Head to head
About

Roll Calculator

This app helps users calculate full and partial roll dimensions for various materials. It allows for inventory management, saving calculations, and defining custom material templates. Easily switch between Imperial and Metric units for precise measurements.

Highlights
  • Calculate full and partial roll dimensions
  • Manage inventory with 'My List'
  • Define custom material templates
  • Switch between Imperial and Metric units
  • Calculate material area coverage
  • Determine material length by counting wraps
Features
Read full description

Roll Calculator makes it easy to work with all materials and roll specifications — Regardless of industry! FEATURES - Easily calculate full and partial roll dimensions. - Manage inventory and save your calculations in My List. - Define Material Templates for any material and size. - Quickly switch between Imperial or Metric units. - Works with any rolled sheet material. Top 4 reasons to use Roll Calculator 1. You work with rolled material and often need to calculate how much material is left on the roll. 2. You are looking for a tool to help manage your partial roll inventory. 3. You often find yourself calculating the area a roll of material will cover. 4. You need to know the length of material left on a roll but forgot to write it down. Don’t panic, just count the number of wraps!.

About

Nix Toolkit

This app connects to Nix Sensor devices to provide color scanning and analysis. It offers features like single scans, access to premium color databases, and custom library creation. Users can view digital color values and spectral curves, and match scanned colors to extensive libraries.

Highlights
  • Single scan color analysis
  • Access to premium color databases
  • Create and share custom color libraries
  • Multipoint average scanning
  • Nix Paints feature
  • Nix Quality Control feature
Read full description

The Nix Toolkit is the new all-in-one companion app for our Nix Sensor device line-up. It’s compatible with all Nix Mini, Nix Pro, Nix QC, and Nix Spectro devices. Functions in the app will be turned on and off depending on which device you have connected. Functions include: 1. “Single scan” (available for all devices) 2. “Premium databases” (available for all devices) 3. “Create and share custom library (Compatible with Nix Pro, Spectro and QC devices only) 4. “Multipoint average scanning for all tools” 5. "Nix Paints feature" 6. "Nix Quality Control feature" The “Single scan” function displays digital values (CIELAB, HEX, and RGB) and Spectral curve on swipe (Spectro device only) when you scan a sample with your Nix Color Sensor. Premium databases offer paid subscriptions to world-class color libraries (including Pantone, RAL, and NCS). Once subscribed you can browse the entire library, and scan and match to the closest color. The Nix Toolkit app lets you take control of how you perceive color. Select from dark or light mode, or use your own system settings. If you have any questions, please don’t hesitate to contact us. We’d love to help with whatever questions or issues you have. Please note that a free account is required to use the app (you will be prompted to create one when you first open the app). A Nix device (Mini, Pro, QC, or Spectro) is required to unlock app functions. Learn more about the Nix Sensor line-up at www.nixsensor.com. If you find any bugs please contact us directly at info@nixsensor.com and our team will attend to them quickly. Nix®, Nix Pro™, and Nix Mini™ are trademarks of Nix Sensor Ltd. All other trademarks used herein are simply references to trademarks owned by others and are not intended as trademark use. Terms of use: https://www.nixsensor.com/legal/

Screenshots

Roll Calculator4 screens
Nix Toolkit4 screens

Verdict

The call

The clearest difference is rating: Nix Toolkit at 4.7 against Roll Calculator's 4.2. Nix Toolkit also leads on review sentiment (33% vs 0%) and ratings volume (190 vs 11). Roll Calculator's advantage is in-app purchases (none vs 10) and update cadence (fortnightly vs every 6 weeks). On price, ads and device support 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. Nix Toolkit sells 10 in-app purchases, starting at $4.99 per month. Roll Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Nix Toolkit holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Nix Toolkit has 190 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 0% of Roll Calculator's written reviews are positive against 33% of Nix Toolkit's.

UpkeepUpdate frequency

Roll Calculator ships an update fortnightly, Nix Toolkit every 6 weeks. Both last shipped on October 14, 2026.

Scorecard7 real differences · 3 level
Roll Calculator versus Nix Toolkit: the parameters behind the verdict, then further details
ParameterRoll CalculatorNix Toolkit
PriceFreeFree
Rating4.2 (11 ratings)4.7 (190 ratings) — better
Positive reviews0.0% of reviews32.8% of reviews — better
Number of ratings11190 — better
Update frequencyFortnightly — betterEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.1
Further details — not scored
Size9 MB68 MB
Age rating4+4+
DeveloperBeta Flash Solutions Inc.Nix Sensor Ltd.

Customer experience

Roll Calculator

All ratings11 ratings
Positive81.8%
Neutral0.0%
Negative18.2%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

Nix Toolkit

All ratings190 ratings
Positive93.7%
Neutral1.1%
Negative5.3%
Written reviews58 reviews
Positive32.8%
Neutral5.2%
Negative62.1%

Bugs and requests

Roll Calculator

Not enough reviews yet to summarise bugs or requests.

Nix Toolkit

Reported bugs

24 issues
  • Sensor crashes if you tab out of the app
  • Takes 5-6 attempts to connect with device
  • Purchased libraries not showing up
  • WiFi router stopping download
  • App crashes since update
Show 19 more
  • App crashes before doing anything
  • App is always 90 degrees wrong on iPads
  • Unit is wildly off even after calibration
  • Constantly prompts for password
  • App took money but won't provide access to Pantone library
  • Cannot connect consistently
  • Battery dead and would not charge
  • Cannot get hold of support
  • Birthday fields don't work on signup
  • Email support form has 'undefined' error
  • App resets settings if device disconnected or phone locked
  • App won't boot up, stuck on 'downloading paints database'
  • Constantly 'downloading paints database'
  • App freezes as soon as you connect
  • App freezes or disconnects constantly
  • App freezes screen and cannot scroll
  • App stuck on downloading paint database
  • App doesn't load up
  • App is stuck downloading paint database

Requested features

20 requests
  • Ability to save and export bulk data as .csv
  • Allow tabbing out of app while collecting data
  • Download paint library without phone signal
  • Show multiple vendor color matches at once
  • Full UI overhaul with iOS conventions
Show 15 more
  • Easier way to scan for color values
  • Easier way to match to paint brands
  • Easier way to save and export data
  • Landscape support for iPads
  • Ability to calibrate sensor
  • On-demand calibration
  • Better password management (Face ID, Apple Keychain)
  • Ability to create custom libraries easily
  • Improved user flow and UI
  • Ability to scan color and get RGB/other values
  • Option to scan color and get multiple paint/other library matches
  • Bring back Nix Paints app functionality
  • More intuitive way to save colors
  • Allow offline use of paint libraries
  • More affordable subscription for Pantone access

In-app purchases

None

Roll Calculator

No in-app purchases

10 purchases

Nix Toolkit

Subscriptions10
  • RAL$4.991 Month
  • Glass Packaging Institute$8.991 Month
  • NCS$9.991 Month
Show 7 more
  • Pantone FHI$9.991 Month
  • Pantone PMS$9.991 Month
  • RAL$49.991 Year
  • NCS$99.991 Year
  • Pantone FHI$99.991 Year
  • Pantone PMS$99.991 Year
  • Glass Packaging Institute$100.001 Year

Questions

Is Roll Calculator free?
Roll Calculator is free to download, with no in-app purchases.
Is Nix Toolkit free?
Nix Toolkit is free to download, with in-app purchases available.
Which has better reviews, Roll Calculator or Nix Toolkit?
Nix Toolkit is rated higher. Roll Calculator averages 4.2 out of 5 from 11 ratings, while Nix Toolkit averages 4.7 from 190 ratings.
Do Roll Calculator or Nix Toolkit have ads?
Neither Roll Calculator nor Nix Toolkit shows ads.
Which is updated more often, Roll Calculator or Nix Toolkit?
Roll Calculator ships an update fortnightly, and Nix Toolkit every 6 weeks. Most recently, Roll Calculator was updated on October 14, 2026 and Nix Toolkit on October 14, 2026.

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