# Concrete Engineering vs CelestialGuide

The clearest difference is rating: Concrete Engineering at 4.2 against CelestialGuide's 1.0. Concrete Engineering also leads on ratings volume (10 vs 1). CelestialGuide's advantage is price ($0.99 vs $3.99). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Concrete Engineering costs $3.99 and CelestialGuide $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Concrete Engineering holds the better App Store score, 4.2 against 1.0. That said, the two scores are not equally well evidenced: Concrete Engineering has 10 ratings behind it against 1, so its average is the more settled of the two.

Concrete Engineering ships an update every 23 months, CelestialGuide every 17 months. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Concrete Engineering | CelestialGuide |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Rating | **[4.2 (10 ratings)](https://appshunter.io/ios/app/concrete-engineering/id643608704/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/celestialguide/id649358382/reviews) |
| Number of ratings | **10** | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 17 months** |
| Monetization | Paid | Paid |
| Size | 8 MB | 17 MB |
| Requires iOS | 18.6 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Geoffrey Domm](https://appshunter.io/developer/373378724) |

## What reviewers say

### Concrete Engineering

[App page](https://appshunter.io/ios/app/concrete-engineering/id643608704)

This app provides civil engineers with a comprehensive suite of 56 calculators for concrete design and analysis. It features smart auto-fill pickers, calculation history with PDF export, and direct ACI code references for all calculations.

**Highlights:** 56 concrete and civil engineering calculators, Metric and Imperial unit support, Smart auto-fill pickers, Calculation history with PDF export, ACI 318-19 code references, Detailed formulas included

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

**In-app purchases:** none


### CelestialGuide

[App page](https://appshunter.io/ios/app/celestialguide/id649358382)

Explore the cosmos with an interactive sky map that displays stars, planets, and celestial events. Point your device at the sky to see a real-time representation of your surroundings, with adjustable visibility settings for stars.

**Highlights:** Interactive sky map, Real-time celestial tracking, Adjustable star visibility, Planet and comet locations, Eclipse and transit rendering, Messier Object database, Virtual Orrery

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Concrete Engineering free?

Concrete Engineering costs $3.99, with no in-app purchases.

### Is CelestialGuide free?

CelestialGuide costs $0.99, with no in-app purchases.

### Which has better reviews, Concrete Engineering or CelestialGuide?

Concrete Engineering is rated higher. Concrete Engineering averages 4.2 out of 5 from 10 ratings, while CelestialGuide averages 1.0 from 1 ratings.

### Do Concrete Engineering or CelestialGuide have ads?

Neither Concrete Engineering nor CelestialGuide shows ads.

### Which is updated more often, Concrete Engineering or CelestialGuide?

Concrete Engineering ships an update every 23 months, and CelestialGuide every 17 months. Most recently, Concrete Engineering was updated on October 12, 2026 and CelestialGuide on October 7, 2026.

---

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