# NLE Calc vs Luminosys

The clearest difference is review sentiment: Luminosys at 75% against NLE Calc's 0%. Luminosys also leads on rating (4.3 vs 2.8). NLE Calc's advantage is ads (none vs shown) and update cadence (fortnightly vs every 19 months). On price, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Luminosys holds the better App Store score, 4.3 against 2.8. Both are backed by a comparable volume of ratings — 10 and 10 respectively. Written reviews point the same way: 0% of NLE Calc's written reviews are positive against 75% of Luminosys's.

NLE Calc ships an update fortnightly, Luminosys every 19 months. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | NLE Calc | Luminosys |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (10 ratings)](https://appshunter.io/ios/app/nle-calc/id1266403464/reviews) | **[4.3 (10 ratings)](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389/reviews)** |
| Number of ratings | 10 | 10 |
| Positive reviews | 0.0% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 19 months |
| Monetization | **Free** | Ad-supported |
| Size | 62 MB | 3 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) | [Melissa Zwick](https://appshunter.io/developer/1616726350) |

## What reviewers say

### NLE Calc

[App page](https://appshunter.io/ios/app/nle-calc/id1266403464)

This utility calculates the Recommended Weight Limit (RWL) and Lifting Index (LI) for single or multiple lifting tasks based on the NIOSH Lifting Equation. It helps assess physical stress to prevent low back musculoskeletal disorders.

**Highlights:** Calculates Recommended Weight Limit (RWL), Calculates Lifting Index (LI), Calculates Composite Lifting Index (CLI), Based on Revised NIOSH Lifting Equation, Assesses physical stress for lifting tasks

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

**In-app purchases:** none


### Luminosys

[App page](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389)

Accurately measure ambient light levels in Lux or Foot Candles using your phone's camera. This tool is ideal for photography, comparing light sources, or indoor gardening. It's designed for ease of use and provides precise readings.

**Highlights:** Measures light in Lux, Measures light in Foot Candles (FC), Uses phone camera for accuracy, Easy to use interface, Suitable for photography, Useful for indoor gardening

**In-app purchases:** none


## Frequently asked questions

### Is NLE Calc free?

NLE Calc is free to download, with no in-app purchases.

### Is Luminosys free?

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

### Which has better reviews, NLE Calc or Luminosys?

Luminosys is rated higher. NLE Calc averages 2.8 out of 5 from 10 ratings, while Luminosys averages 4.3 from 10 ratings.

### Do NLE Calc or Luminosys have ads?

Luminosys shows ads; NLE Calc does not.

### Which is updated more often, NLE Calc or Luminosys?

NLE Calc ships an update fortnightly, and Luminosys every 19 months. Most recently, NLE Calc was updated on October 18, 2026 and Luminosys on October 24, 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.*