# LightSpectrum Pro vs Exp. Group

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.

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.

## The numbers

| Metric | LightSpectrum Pro | Exp. Group |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.1 (39 ratings)](https://appshunter.io/ios/app/lightspectrum-pro/id468368751/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/exp-group/id1561489149/reviews) |
| Number of ratings | **39** | 2 |
| Positive reviews | 28.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | Free | Free |
| Best chart rank | **#33** | — |
| Size | 88 MB | 10 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AM PowerSoftware](https://appshunter.io/developer/303958914) | [Salsa](https://appshunter.io/developer/1508255760) |

## What reviewers say

### LightSpectrum Pro

[App page](https://appshunter.io/ios/app/lightspectrum-pro/id468368751)

**Currently charting:** #33 Top Paid · Utilities (US App Store)

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.

**Highlights:** Color temperature measurement, Color spectrum analysis (360nm-800nm), CIE 1931 white point display, Wavelength filtering and overlay, High accuracy compared to professional devices

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 📸 Accurate white balance measurement for photography
- 💡 Innovative spectrum analysis without expensive equipment
- 💰 Affordable alternative to $1,600+ professional color meters
- 📊 Detailed spectral graph visualization
- 🎯 Useful for photographers, videographers, and lighting professionals

**What reviewers complain about**

- 🐛 Frequent crashes and freezing issues
- 📱 Incompatible with many iPhone models (iPhone 5, 5S, 6, 6+, 11, X)
- ❌ Camera access problems on multiple devices
- 🎨 Inaccurate readings for certain light types (LEDs, low color temps)
- 🖥️ Poor UI scaling on larger screens (iPhone 6+, iPad)

**Reported bugs**

- 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

**Requested features**

- 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


### Exp. Group

[App page](https://appshunter.io/ios/app/exp-group/id1561489149)

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.

**Highlights:** Register new orders, Review order history, Edit existing orders, Check product prices

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LightSpectrum Pro free?

LightSpectrum Pro costs $1.99, with no in-app purchases.

### Is Exp. Group free?

Exp. Group is free to download, with no in-app purchases.

### Which has better reviews, LightSpectrum Pro or Exp. Group?

LightSpectrum Pro is rated higher. LightSpectrum Pro averages 4.1 out of 5 from 39 ratings, while Exp. Group averages 3.0 from 2 ratings.

### Do LightSpectrum Pro or Exp. Group have ads?

Neither LightSpectrum Pro nor Exp. Group shows ads.

### Which is updated more often, LightSpectrum Pro or Exp. Group?

LightSpectrum Pro ships an update every 3 months, and Exp. Group every 4 days. Most recently, LightSpectrum Pro was updated on October 14, 2026 and Exp. Group on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*