# LightLAB PRO vs Lumen Calculator

The clearest difference is update cadence: LightLAB PRO at every 2 months against Lumen Calculator's every 27 months. LightLAB PRO also leads on review sentiment (9% vs 0%) and iOS requirement (10.3 vs 13). Lumen Calculator's advantage is price ($2.99 vs $3.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

LightLAB PRO costs $3.99 and Lumen Calculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

LightLAB PRO ships an update every 2 months, Lumen Calculator every 27 months. The most recent releases landed on October 19, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | LightLAB PRO | Lumen Calculator |
| --- | --- | --- |
| Price | $3.99 | **$2.99** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/lightlab-pro/id482015593/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **8.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 27 months |
| Monetization | Paid | Paid |
| Size | 33 MB | 1 MB |
| Requires iOS | **10.3** | 13 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AM PowerSoftware](https://appshunter.io/developer/303958914) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### LightLAB PRO

[App page](https://appshunter.io/ios/app/lightlab-pro/id482015593)

This app provides professional lighting analysis tools for photographers, videographers, and lighting professionals. It measures various light parameters with high accuracy, including exposure, color temperature, and white point, and can scan light spectra.

**Highlights:** Measure lighting level, Calculate exposure level (EV), Determine color temperature (Kelvin), Measure aperture value (f stop), Calculate exposure time, Scan light spectrum, Analyze light spectrum components and wavelengths

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ✨ Beautiful interface
- 👍 Clearer than old version
- 📈 Accurate EV indices
- 💡 Potentially useful app

**What reviewers complain about**

- ⚫️ Black screen on launch
- ❌ Does not work
- 📉 Inaccurate readings
- 🤷 No manual or support
- 🛠️ Buggy operation

**Reported bugs**

- ⚫️ Black screen on launch
- 🐛 App crashes
- 🐛 Freezes from time to time
- 🐛 App closes immediately
- 🐛 App crashes on launch

**Requested features**

- 💡 Circle in the middle for measurement
- 💡 Changeable circle size
- 💡 More detailed calibration instructions
- 💡 Ability to add own light sources
- 💡 Dark mode option


### Lumen Calculator

[App page](https://appshunter.io/ios/app/lumen-calculator/id1412317888)

This physics and math tool quickly converts between lumens, lux, and candelas. It provides instant calculations with copyable results and includes reference formulas. Optimized for everyday use, it supports high precision and various units.

**Highlights:** Instant calculation, Copyable results, Reference formulas, High precision (16 decimal places), Supports various units, Ad-free and private

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is LightLAB PRO free?

LightLAB PRO costs $3.99, with no in-app purchases.

### Is Lumen Calculator free?

Lumen Calculator costs $2.99, with no in-app purchases.

### Do LightLAB PRO or Lumen Calculator have ads?

Neither LightLAB PRO nor Lumen Calculator shows ads.

### Which is updated more often, LightLAB PRO or Lumen Calculator?

LightLAB PRO ships an update every 2 months, and Lumen Calculator every 27 months. Most recently, LightLAB PRO was updated on October 19, 2026 and Lumen Calculator on October 13, 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.*