Comparison

HATO ONE vs Light Spectrometer Wavelength

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

Head to head
About

HATO ONE

This utility app measures key light aspects crucial for poultry welfare and performance. It allows comparison with industry standards and export of data for analysis. Remote measurement capabilities enhance user convenience.

Highlights
  • Measures light intensity
  • Measures critical color temperature
  • Measures light spectrum
  • Measures color rendering index
  • Measures light flicker
  • Compares measurements to standards
  • Exports data to PC
  • Remote measurement
Features
Read full description

The HATO ONE is an all-in-one light meter. A must-have for every poultry specialist who is aiming to improve animal welfare and performances by means of lighting. This product is able to measure all key aspects of light that matter for poultry: • Light intensity • Critical Colour Temperature • Light spectrum • Colour Rendering Index • Light flicker After measurement, the HATO ONE enables you to compare specific measurement results with poultry needs, human needs or other lamps on the spot to directly allocate points of improvement. All measurement data can be exported to a PC for further analysis as well. The results after measurement can immediately be seen at the HATO ONE App. Furthermore, the HATO ONE APP makes it possible to measure from a distance, so you don’t have to keep the meter in your hands all the time. Improve performances, start measuring! More information? www.hato.one

About

Light Spectrometer Wavelength

This application analyzes light to determine its dominant wavelength in nanometers, frequency in terahertz, and period length in femtoseconds. It provides real-time measurements and allows users to save their findings with notes. The app is designed for measuring colored light sources.

Highlights
  • Measures dominant wavelength (nm)
  • Measures frequency (THz)
  • Measures period length (fs)
  • Real-time measurement
  • Save measurements with notes
  • Optional calibration
Features
Read full description

Measures light spectrum to determine the dominant wavelength in nm, frequency in THz and period length in fs. DOMINANT WAVELENGTH Dominant wavelength is a concept commonly used in the field of color science and perception. It refers to the wavelength of light that appears most prominent or dominant in a given color mixture or light source. In other words, it is the wavelength that our eyes perceive as the primary color in a mixture of different wavelengths. For light with only one wavelength, such as the light from a colored LED, the dominant wavelength corresponds to the wavelength of that light. KEY FEATURES • High accuracy • Real-time measurement • Measures light wavelength in nanometers (nm) • Measures light frequency in terahertz (Thz) • Measures light period length in femtoseconds (fs) • Easy to use • Save measurements with notes • Supports 40 languages, including english • Optional calibration for enhanced precision MEASURING 1. Find a white surface, such as a plain piece of white paper 2. Point your camera at the surface illuminated by your target light source 3. The app gives you accurate measurements in real-time LIMITATIONS Smartphone cameras have limitations when it comes to distinguishing between different very short, or very long wavelengths. More specifically, on many devices the accuracy below 465 nm and above 610 nm is very limited. This is due to the physical camera sensors in the devices. An automatic warning appears on the screen for these short and long wavelengths. WHITE LIGHT Note that is not meaningful to measure the dominant wavelength of white light as white light consists of a wide range of wavelengths, with no wavelength dominating. This app is made for measuring colored light. If you are interested in determining the color temperature of white light, please instead use our popular White Balance Kelvin Meter app. COLOR OF SURFACES If you want to measure the color of a surface or material, rather than of light, please instead use our popular Colorimeter Camera Color Meter app. Privacy Policy, https://spectrometer.contechity.com/pp.html End User License Agreement, https://spectrometer.contechity.com/eula.html CONTACT I value your feedback. Email me at apps@contechity.com with any suggestions or questions. Download the Spectrometer now!

Screenshots

HATO ONE4 screens
Light Spectrometer Wavelength4 screens

Verdict

The call

The clearest difference is review sentiment: Light Spectrometer Wavelength at 72% against HATO ONE's 0%. Light Spectrometer Wavelength also leads on rating (4.2 vs 2.0) and update cadence (every 2 months vs every 8 months). HATO ONE's advantage is in-app purchases (none vs 7) and iOS requirement (11.0 vs 15.0). 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. Light Spectrometer Wavelength sells 4 in-app purchases, starting at $0.99 per month. HATO ONE asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Light Spectrometer Wavelength holds the better App Store score, 4.2 against 2.0. That said, the two scores are not equally well evidenced: Light Spectrometer Wavelength has 92 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 0% of HATO ONE's written reviews are positive against 72% of Light Spectrometer Wavelength's.

UpkeepUpdate frequency

HATO ONE ships an update every 8 months, Light Spectrometer Wavelength every 2 months. The most recent releases landed on June 4, 2026 and September 22, 2026 respectively.

Scorecard7 real differences · 3 level
HATO ONE versus Light Spectrometer Wavelength: the parameters behind the verdict, then further details
ParameterHATO ONELight Spectrometer Wavelength
PriceFreeFree
Rating2.0 (5 ratings)4.2 (92 ratings) — better
Positive reviews0.0% of reviews71.9% of reviews — better
Number of ratings592 — better
Update frequencyEvery 8 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size31 MB43 MB
Age rating4+4+
DeveloperUnited Power Research Technology CorporationContechity AB

Customer experience

HATO ONE

All ratings5 ratings
Positive20.0%
Neutral0.0%
Negative80.0%
Written reviews9 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Light Spectrometer Wavelength

All ratings92 ratings
Positive80.4%
Neutral3.3%
Negative16.3%
Written reviews32 reviews
Positive71.9%
Neutral3.1%
Negative25.0%

In-app purchases

None

HATO ONE

No in-app purchases

4 purchases

Light Spectrometer Wavelength

Subscriptions3
  • Full Access7 Days trial$0.991 Month
  • Full access14 Days trial$0.991 Month
  • Full access$4.991 Year
One-time1
  • Full access4 variants$6.99

Questions

Is HATO ONE free?
HATO ONE is free to download, with no in-app purchases.
Is Light Spectrometer Wavelength free?
Light Spectrometer Wavelength is free to download, with in-app purchases available.
Which has better reviews, HATO ONE or Light Spectrometer Wavelength?
Light Spectrometer Wavelength is rated higher. HATO ONE averages 2.0 out of 5 from 5 ratings, while Light Spectrometer Wavelength averages 4.2 from 92 ratings.
Do HATO ONE or Light Spectrometer Wavelength have ads?
Neither HATO ONE nor Light Spectrometer Wavelength shows ads.
Which is updated more often, HATO ONE or Light Spectrometer Wavelength?
HATO ONE ships an update every 8 months, and Light Spectrometer Wavelength every 2 months. Most recently, HATO ONE was updated on June 4, 2026 and Light Spectrometer Wavelength on September 22, 2026.

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