Comparison

HouseCurve 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

HouseCurve

This app provides a suite of tools for tuning audio systems, including room correction, equalizer adjustments, and subwoofer phase setting. It measures in-room frequency response and can generate filter settings for various audio systems. It's suitable for home and car audio enthusiasts looking to optimize their sound.

Highlights
  • Sine sweep and pink noise measurements
  • Real-time moving mic measurements
  • Target curve comparison and creation
  • Room correction filter generation (PEQ/FIR)
  • Magnitude, phase, and group delay display
  • Compatibility with various audio systems
Features
Read full description

HouseCurve is a multi-tool for audio systems. Use it for room correction, adjusting equalizers, setting subwoofer phase, choosing crossovers and more. Features: * Sine sweep and real time pink noise measurements * Sweep measurements can be averaged as they are collected * Alternatively, use real time tool to collect moving mic measurements (MMM) * Compare measurements to a selected target curve * Create and edit target curves * Generate room correction filters (PEQ or FIR) * Filters compatible with a variety of systems including Roon, Volumio, CamillaDSP, EqualizerAPO, miniDSP and Crestron DM NAX * Display magnitude, phase and group delay * Use with built-in or external microphones * Connect with AirPlay, Bluetooth, headphone jack (analog) or use external stimulus HouseCurve measures in-room frequency response by listening to your audio system play a sine sweep. Measurements are displayed on top of a target curve, making it easy to see where adjustment is needed. Multiple measurements can be averaged to fully capture how the system sounds in the listening area. With small changes and repeat measurements, you can manually tune your system to the target curve. If your audio system has a parametric equalizer or convolution engine, HouseCurve can automatically generate filter settings to match the target curve. HouseCurve can help with home and car audio system tuning, from system equalization and room correction to subwoofer time alignment and speaker placement. Visit housecurve.com for more information on how HouseCurve works and how to use it. HouseCurve will produce acceptable results with the built in iPhone/iPad microphone. Using calibrated external microphones will provide higher accuracy. The free version of HouseCurve can measure your audio system and display a magnitude plot (aka "frequency response"). Additional features, such as room correction filter generation, advanced measurement tools and target curve editing can be obtained via in-app purchases.

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

HouseCurve4 screens
Nix Toolkit4 screens

Verdict

The call

HouseCurve and Nix Toolkit both sit at 4.7 stars, but that hides the real split: 81% of HouseCurve's written reviews are positive against 33% of Nix Toolkit's. Nix Toolkit's advantage is iOS requirement (15.1 vs 18.6). On price, rating, ratings volume and update cadence 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. HouseCurve sells 2 one-off in-app purchases and Nix Toolkit sells 10 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for HouseCurve against 4.7 for Nix Toolkit. Both are backed by a comparable volume of ratings — 264 and 213 respectively. Written reviews are what separate them: 81% of HouseCurve's written reviews are positive against 33% of Nix Toolkit's.

UpkeepUpdate frequency

HouseCurve ships an update every 2 months, Nix Toolkit every 6 weeks. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 8 level
HouseCurve versus Nix Toolkit: the parameters behind the verdict, then further details
ParameterHouseCurveNix Toolkit
PriceFreeFree
Rating4.7 (264 ratings)4.7 (213 ratings) — better
Positive reviews80.7% of reviews — better32.8% of reviews
Number of ratings264 — better213
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.615.1 — better
Further details — not scored
Size11 MB68 MB
Age rating4+4+
DeveloperGreg WildingNix Sensor Ltd.

Customer experience

HouseCurve

All ratings259 ratings
Positive92.7%
Neutral3.1%
Negative4.2%
Written reviews57 reviews
Positive80.7%
Neutral7.0%
Negative12.3%

Nix Toolkit

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

User reviews

HouseCurve

From 264 App Store ratings

What we love

  • 👍 Easy to use and setup
  • 💰 Great value for money
  • 🔊 Significantly improves sound quality
  • 📱 Utilizes iPhone microphone effectively
  • 🔌 Compatible with various EQ software (e.g., Equalizer APO, Roon)

Room to improve

  • 🐛 Unreliable connection issues
  • 🐛 Frequent crashes or bugs
  • 🐛 App asks to upgrade after purchase
  • 🐛 Bluetooth connectivity issues
  • 🐛 Sweep tone not detected

Nix Toolkit

From 213 App Store ratings

What we love

  • 👍 Excellent color matches
  • 👍 Accurate color scanning
  • 👍 Fantastic app and product
  • 👍 Easy to use (for some)
  • 👍 Solid app, cool concept

Room to improve

  • 🐛 App crashes frequently
  • 🐛 Poor connection issues
  • 🐛 App is unusable without signal
  • 🐛 Purchased libraries don't work
  • 🐛 Paint libraries not downloading

Bugs and requests

HouseCurve

Reported bugs

14 issues
  • Will not connect to iPhone
  • Won't connect and play after upgrades
  • App keeps asking to upgrade after payment
  • Cannot connect to Airplay music systems
  • Bluetooth doesn't work well
Show 9 more
  • Resets phone every 2nd or 3rd attempt
  • Unreliable sweeps (one out of two to three works)
  • External sweep signal not picked up
  • Cannot start over from scratch without uninstalling
  • Cannot detect signal for test tone
  • EQ does not change graph
  • Airplay connection to Bluesound Node 2i not always made
  • Plays music from Apple Music instead of sweep tone
  • iPad gives different responses than iPhone

Requested features

10 requests
  • True support for headphones
  • Download measured plots for offline analysis
  • Ability to export a zip of filters at once
  • Option to normalize filters
  • Clarification on Q value for EQ frequencies
Show 5 more
  • Ability to see Q number for EQ frequencies
  • White background graph option for printing
  • More reliable Airplay connection
  • Fix for starting over from scratch without uninstalling
  • Warning about high volume levels

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

2 purchases

HouseCurve

One-time2
  • Tuning Bundle One Year$20.00
  • Tuning Bundle Lifetime$70.00
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 HouseCurve free?
HouseCurve is free to download, with in-app purchases available.
Is Nix Toolkit free?
Nix Toolkit is free to download, with in-app purchases available.
Which has better reviews, HouseCurve or Nix Toolkit?
Nix Toolkit is rated higher. HouseCurve averages 4.7 out of 5 from 264 ratings, while Nix Toolkit averages 4.7 from 213 ratings.
Do HouseCurve or Nix Toolkit have ads?
Neither HouseCurve nor Nix Toolkit shows ads.
Which is updated more often, HouseCurve or Nix Toolkit?
HouseCurve ships an update every 2 months, and Nix Toolkit every 6 weeks. Most recently, HouseCurve was updated on October 26, 2026 and Nix Toolkit on October 29, 2026.

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