LightSpectrum Pro vs Exp. Group
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LightSpectrum Pro
Measure light source color temperature and spectrum accurately without expensive equipment. View the color spectrum from 360nm to 800nm, and analyze the white point on the CIE 1931 diagram. Overlay filtered wavelengths on camera images to see frequency reflections and intensity.
- Color temperature measurement
- Color spectrum analysis (360nm-800nm)
- CIE 1931 white point display
- Wavelength filtering and overlay
- High accuracy compared to professional devices
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With LightSpectrumPro EVO you can measure the color temperature of a light source without having to spend hundreds of dollars on professional devices. LightSpectrumPro EVO has an error of 2 - 8% compared to existing professional products on the market. in addition to the color temperature measurement in Kelvin, LightSpectrumPro EVO allows you to view the color spectrum of the light being examined with a band ranging from 360nm to 800nm. in addition to the spectrum it is possible to display the position of the white point on the CIE 1931 diagram and to apply a filter for wavelengths to display in overlay on the image captured by the cameras which elements reflect a specific frequency and with what intensity.
Exp. Group
This utility app allows users to manage their orders efficiently. You can register new orders, view your complete order history, make corrections to existing orders, and check product pricing.
- Register new orders
- Review order history
- Edit existing orders
- Check product prices
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With the "Exp. Group" app you will have access to the following functionalities: 1. Register new orders. 2. Review your order history. 3. Edit your orders to correct errors. 4. Review the price of all products.
Screenshots
Verdict
The clearest difference is price: Exp. Group at Free against LightSpectrum Pro's $1.99. Exp. Group also leads on update cadence (every 4 days vs every 3 months) and iOS requirement (13.0 vs 15.6). LightSpectrum Pro's advantage is rating (4.1 vs 3.0) and ratings volume (39 vs 2). On ads, in-app purchases, monetization model 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
Exp. Group is free to download; LightSpectrum Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
LightSpectrum Pro holds the better App Store score, 4.1 against 3.0. That said, the two scores are not equally well evidenced: LightSpectrum Pro has 39 ratings behind it against 2, so its average is the more settled of the two.
LightSpectrum Pro ships an update every 3 months, Exp. Group every 4 days. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.
| Parameter | LightSpectrum Pro | Exp. Group |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.1 (39 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 28.5% of reviews | — |
| Number of ratings | 39 — better | 2 |
| Update frequency | Every 3 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #42 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 88 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | AM PowerSoftware | Salsa |
Customer experience
LightSpectrum Pro
Exp. Group
Bugs and requests
LightSpectrum Pro
Reported bugs
11 issues- App crashes on startup or during use
- Camera feed not accessible or showing red X icon
- Screen blinking/flashing on first launch
- UI elements cut off on larger screens
- Buttons unresponsive or sticky
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- App freezes and cannot be exited
- Black screen on launch
- Inconsistent readings that change rapidly
- App stuck on opening screen
- Camera focus issues on iPhone X and newer models
- Incompatibility with iOS 5, 6, and newer iPhone models
Requested features
11 requests- Spot metering with crosshairs or target reticle
- Direct DUV (Delta uv) display calculation
- Flicker detection for light sources
- Calibration function for improved accuracy
- Support for fluorescent light preset adjustments
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- Tap-to-focus camera control
- Landscape orientation support
- Ability to disable tutorial tips
- Screenshot capability in landscape mode
- Better documentation and user guide
- Device compatibility information in app store listing
Exp. Group
Not enough reviews yet to summarise bugs or requests.
In-app purchases
LightSpectrum Pro
No in-app purchases
Exp. Group
No in-app purchases
Questions
Is LightSpectrum Pro free?
Is Exp. Group free?
Which has better reviews, LightSpectrum Pro or Exp. Group?
Do LightSpectrum Pro or Exp. Group have ads?
Which is updated more often, LightSpectrum Pro or Exp. Group?
Other comparisons
