Comparison

N+Chroma vs EwePro

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

Head to head
About

N+Chroma

Scan real-world colors using a specialized sensor and view their numerical data in various formats. Save scanned colors to collections for later comparison and analysis under different lighting conditions.

Highlights
  • Scan colors with Chroma-NODE sensor
  • Display color information (RGB, HEX, L*a*b*, CMYK)
  • Store scanned colors in collections
  • Compare scanned colors numerically
  • View color data in D65 and D50 lighting
Features
Read full description

HARDWARE REQUIRED: N+Chroma color sensor from variableinc.com PLEASE NOTE: This application requires an iPhone 4s (or newer) or an iPad 3 (or newer), or an iPad Mini, and a NODE sensor device with a Chroma module. Please see our website at www.variabletech.com for more information. The Chroma App will let you scan colors using the Chroma – NODE sensor, and displays the color information on the screen. Great for getting color information off of real world objects! Chroma provides numerical color information in: RGB, HEX, L*a*b*, and CMYK formats. The color graphic displayed on iOS device is an approximate representation of the color scanned. Exact color information can only be attained by the numerical color information. Additionally, scanned colors are stored to the user’s collections to be looked up later, or used for comparison in the Compare Color View (where you can scan colors into left and right view to get a numerical comparison of the colors). The Chroma app also enables the user to view color information in both D65 and D50 lighting environments to make using colors in other applications or web design quick and simple. Please note that for this application to run, the user must have a NODE module sensor from Variable Technologies along with a Chroma color sensor module. About NODE: NODE is a patent-pending wireless sensor platform capable of measuring, recording, and transmitting a wide array of sensor data. NODE is a Bluetooth Smart device, using the latest low energy Bluetooth standard to communicate sensor data to Bluetooth Smart Devices such as the Apple iPhone 4s, Apple iPhone 5, Apple iPad3, and Apple iPad Mini.

About

EwePro

Features
Read full description

EwePro is a companion app for anyone using eWeLink-compatible devices (smart plugs, switches, sensors, and more). It doesn't replace the official eWeLink app, but offers an alternative experience with an interface redesigned from scratch to be quicker and easier to use. What you'll find in EwePro: • Customizable dashboard with your most-used devices • Simplified navigation: fewer taps, more action • Intuitive device grouping by room or category • Clear real-time status display • Design optimized for fast everyday use EwePro uses the same credentials as your eWeLink account. No new account is required. Currently supported Sonoff devices: • Wall switches (TX1C, TX2C, TX3C) • Smart plugs (S61STPF) and power-monitoring plugs (POWCT) • Roller shutter/curtain motors (DUALR3) • Thermostats with relay (THR320) • Smart thermostatic valves • Relays and general switches (RE5V1C, SV) • Zigbee temperature/humidity sensors (SNZB-02P) Note: EwePro is an independent app and is not affiliated with CoolKit Technology or eWeLink.

Screenshots

N+Chroma4 screens
EwePro4 screens

Verdict

The call

The clearest difference is update cadence: EwePro at daily against N+Chroma's every 2 months. N+Chroma's advantage is iOS requirement (9.1 vs 13.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

N+Chroma ships an update every 2 months, EwePro daily. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 8 level
N+Chroma versus EwePro: the parameters behind the verdict, then further details
ParameterN+ChromaEwePro
PriceFreeFree
Rating3.4 (5 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings5 — better—
Update frequencyEvery 2 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPod
Requires iOS9.1 — better13.0
Further details — not scored
Size20 MB21 MB
Age rating4+4+
DeveloperVariable Technologies LLCRocco De Francesco

In-app purchases

None

N+Chroma

No in-app purchases

None

EwePro

No in-app purchases

Questions

Is N+Chroma free?
N+Chroma is free to download, with no in-app purchases.
Is EwePro free?
EwePro is free to download, with no in-app purchases.
Do N+Chroma or EwePro have ads?
Neither N+Chroma nor EwePro shows ads.
Which is updated more often, N+Chroma or EwePro?
N+Chroma ships an update every 2 months, and EwePro daily. Most recently, N+Chroma was updated on November 1, 2026 and EwePro on October 28, 2026.

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