# Rebar Calc vs Concrete Evap

The clearest difference is in-app purchases: Rebar Calc at none against Concrete Evap's 2. Rebar Calc also leads on ratings volume (643 vs 1) and update cadence (every 2 months vs every 10 months). On price, rating, ads and monetization model there is nothing between them.

Both are free to download. Concrete Evap sells 2 in-app purchases, starting at $2.99 per month. Rebar Calc asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Rebar Calc against 5.0 for Concrete Evap. That said, the two scores are not equally well evidenced: Rebar Calc has 643 ratings behind it against 1, so its average is the more settled of the two.

Rebar Calc ships an update every 2 months, Concrete Evap every 10 months. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Rebar Calc | Concrete Evap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (643 ratings)](https://appshunter.io/ios/app/rebar-calc/id1134344254/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/concrete-evap/id6743004622/reviews)** |
| Number of ratings | **643** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Ad-supported | Ad-supported |
| Size | 13 MB | 7 MB |
| Requires iOS | **18.0** | 18.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Appco LLC (USA)](https://appshunter.io/developer/1027562416) | [Chad Wallace](https://appshunter.io/developer/1653657586) |

## What reviewers say

### Rebar Calc

[App page](https://appshunter.io/ios/app/rebar-calc/id1134344254)

This app simplifies concrete and rebar calculations for construction projects. It helps estimate rebar tonnage, mesh quantities, and concrete volume, and can even provide quotes for materials.

**Highlights:** Rebar tonnage calculation, Sheet and roll mesh estimation, Concrete volume estimator, Material quote generation, Adjustable lap amount, Configurable rebar/mesh size

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

**In-app purchases:** none


### Concrete Evap

[App page](https://appshunter.io/ios/app/concrete-evap/id6743004622)

This tool helps construction professionals assess the risk of plastic shrinkage cracking in concrete. It analyzes real-time weather data to calculate evaporation rates and provides a risk assessment, enabling preventative measures for better concrete quality.

**Highlights:** Plastic shrinkage crack risk assessment, Real-time weather data analysis, Evaporation rate calculation, Risk assessment for concrete quality, On-site decision making

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $2.99 | per month |
| Plus Yearly | $19.99 | per year |


## Frequently asked questions

### Is Rebar Calc free?

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

### Is Concrete Evap free?

Concrete Evap is free to download, with in-app purchases available.

### Which has better reviews, Rebar Calc or Concrete Evap?

Concrete Evap is rated higher. Rebar Calc averages 4.9 out of 5 from 643 ratings, while Concrete Evap averages 5.0 from 1 ratings.

### Do Rebar Calc or Concrete Evap have ads?

Both Rebar Calc and Concrete Evap show ads.

### Which is updated more often, Rebar Calc or Concrete Evap?

Rebar Calc ships an update every 2 months, and Concrete Evap every 10 months. Most recently, Rebar Calc was updated on November 6, 2026 and Concrete Evap on November 8, 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.*