# Deflection Lite vs Lighting Calculations

The clearest difference is in-app purchases: Deflection Lite at none against Lighting Calculations's 3. Deflection Lite also leads on ads (none vs shown) and ratings volume (46 vs 6). Lighting Calculations's advantage is rating (4.8 vs 4.5) and review sentiment (60% vs 44%). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Lighting Calculations sells 3 in-app purchases, starting at $1.99 per 3 months. Deflection Lite asks for nothing beyond the download.

Lighting Calculations holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Deflection Lite has 46 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 44% of Deflection Lite's written reviews are positive against 60% of Lighting Calculations's.

Deflection Lite ships an update every 3 months, Lighting Calculations every 5 weeks. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Deflection Lite | Lighting Calculations |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (46 ratings)](https://appshunter.io/ios/app/deflection-lite/id974474071/reviews) | **[4.8 (6 ratings)](https://appshunter.io/ios/app/lighting-calculations/id1021580336/reviews)** |
| Number of ratings | **46** | 6 |
| Positive reviews | 44.4% of reviews | **60.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 108 MB | 32 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blue Ketchep](https://appshunter.io/developer/1131834248) | [Egal Net di Ettore Gallina](https://appshunter.io/developer/993232047) |

## What reviewers say

### Deflection Lite

[App page](https://appshunter.io/ios/app/deflection-lite/id974474071)

This app provides interactive and precise structural beam analysis. Easily visualize beam bending by dragging loads and supports, and calculate key engineering results like reactions, shear force, and bending moment.

**Highlights:** Interactive beam bending visualization, Calculate reactions, shear force, and bending moment, Built-in cross-section databases, Unlimited loads and supports, Export design to shareable permalink, Metric and standard units

**Features:** Vision Pro support

**In-app purchases:** none


### Lighting Calculations

[App page](https://appshunter.io/ios/app/lighting-calculations/id1021580336)

This app transforms your smartphone into a comprehensive lighting design tool. It offers advanced calculations for room lighting, LED analysis, and efficiency, alongside quick conversions and essential technical resources. Ensure your lighting projects meet all standards and optimize energy usage.

**Highlights:** Room lighting design calculations, LED analysis (lifespan, photobiological risk), Energy efficiency calculations, Photometric code decoding, Lumen, Lux, Candela, Watt conversions, Normative requirements and technical guides, Light quality metrics (CRI, UGR)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Version (3 months) | $1.99 | per 3 months |
| PRO Version (1 year) | $2.99 | per year |
| PRO Version (Lifetime) | $89.99 | one-time |


## Frequently asked questions

### Is Deflection Lite free?

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

### Is Lighting Calculations free?

Lighting Calculations is free to download, with in-app purchases available.

### Which has better reviews, Deflection Lite or Lighting Calculations?

Lighting Calculations is rated higher. Deflection Lite averages 4.5 out of 5 from 46 ratings, while Lighting Calculations averages 4.8 from 6 ratings.

### Do Deflection Lite or Lighting Calculations have ads?

Lighting Calculations shows ads; Deflection Lite does not.

### Which is updated more often, Deflection Lite or Lighting Calculations?

Deflection Lite ships an update every 3 months, and Lighting Calculations every 5 weeks. Most recently, Deflection Lite was updated on October 4, 2026 and Lighting Calculations on October 3, 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.*