# Structural Engineering lite vs CSiUnits

The clearest difference is rating: CSiUnits at 4.8 against Structural Engineering lite's 4.2. CSiUnits also leads on in-app purchases (none vs 1) and ads (none vs shown). Structural Engineering lite's advantage is review sentiment (60% vs 50%) and ratings volume (19 vs 4). On price and device support there is nothing between them.

Both are free to download. Structural Engineering lite sells 1 one-off in-app purchase. CSiUnits asks for nothing beyond the download.

CSiUnits holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 19 and 4 respectively. Written reviews complicate that: 60% of Structural Engineering lite's written reviews are positive against 50% of CSiUnits's, so the app with the better star average is not the one people write more warmly about.

Structural Engineering lite ships an update every 6 months, CSiUnits monthly. The most recent releases landed on October 7, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Structural Engineering lite | CSiUnits |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (19 ratings)](https://appshunter.io/ios/app/structural-engineering-lite/id638690043/reviews) | **[4.8 (4 ratings)](https://appshunter.io/ios/app/csiunits/id1344138128/reviews)** |
| Number of ratings | **19** | 4 |
| Positive reviews | **60.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 13 MB |
| Requires iOS | 17.6 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Computers and Structures, Inc.](https://appshunter.io/developer/1119970032) |

## What reviewers say

### Structural Engineering lite

[App page](https://appshunter.io/ios/app/structural-engineering-lite/id638690043)

This app provides engineers with essential structural formulas and calculations for civil construction projects. It offers instant results, demand/capacity checks, and a built-in database of materials and sections, all accessible on mobile devices.

**Highlights:** 59 structural formulas (AISC/ACI), Instant demand/capacity checks, Built-in AISC section database, Material and code references, USCS & SI unit support, Pass/Fail visual indicator

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Structural Engineering Calc. | $5.99 | one-time |


### CSiUnits

[App page](https://appshunter.io/ios/app/csiunits/id1344138128)

This application provides a comprehensive tool for converting units across various scientific disciplines and everyday needs. It offers over 70 conversion options, catering to professionals, students, and anyone requiring precise unit transformations.

**Highlights:** Multiple one-time conversion lists, Conversions for lifestyle and science, Over 70 conversion options, Numeric value input, Converted values to all possible units

**In-app purchases:** none


## Frequently asked questions

### Is Structural Engineering lite free?

Structural Engineering lite is free to download, with in-app purchases available.

### Is CSiUnits free?

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

### Which has better reviews, Structural Engineering lite or CSiUnits?

CSiUnits is rated higher. Structural Engineering lite averages 4.2 out of 5 from 19 ratings, while CSiUnits averages 4.8 from 4 ratings.

### Do Structural Engineering lite or CSiUnits have ads?

Structural Engineering lite shows ads; CSiUnits does not.

### Which is updated more often, Structural Engineering lite or CSiUnits?

Structural Engineering lite ships an update every 6 months, and CSiUnits monthly. Most recently, Structural Engineering lite was updated on October 7, 2026 and CSiUnits on September 17, 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.*