# Rebar Calc vs Evap Solutions

Rebar Calc and Evap Solutions both sit at 4.9 stars, but that hides the real split: 100% of Evap Solutions's written reviews are positive against 60% of Rebar Calc's. Evap Solutions also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). Rebar Calc's advantage is in-app purchases (none vs 2) and ratings volume (644 vs 2). On price, rating, device support and iOS requirement there is nothing between them.

Both are free to download. Evap Solutions sells 2 in-app purchases, starting at $9.99 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 Evap Solutions. That said, the two scores are not equally well evidenced: Rebar Calc has 644 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 60% of Rebar Calc's written reviews are positive against 100% of Evap Solutions's.

Rebar Calc ships an update every 2 months, Evap Solutions every 3 weeks. The most recent releases landed on October 29, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Rebar Calc | Evap Solutions |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (644 ratings)](https://appshunter.io/ios/app/rebar-calc/id1134344254/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/evap-solutions/id6754700234/reviews)** |
| Number of ratings | **644** | 2 |
| Positive reviews | 60.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Ad-supported** | Subscription |
| Size | 13 MB | 25 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Appco LLC (USA)](https://appshunter.io/developer/1027562416) | [1L Concrete Solutions](https://appshunter.io/developer/1849693371) |

## 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


### Evap Solutions

[App page](https://appshunter.io/ios/app/evap-solutions/id6754700234)

This app helps concrete professionals calculate evaporation rates based on weather conditions. It provides guidance to prevent cracks and improve concrete curing for stronger, longer-lasting results. A free trial is available before subscribing.

**Highlights:** Concrete evaporation rate calculation, Crack prevention guidance, Weather-based adjustments, User-friendly interface, Moisture control and curing management

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $9.99 | per month |
| Annual Subscription | $39.99 | per year |


## Frequently asked questions

### Is Rebar Calc free?

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

### Is Evap Solutions free?

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

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

Evap Solutions is rated higher. Rebar Calc averages 4.9 out of 5 from 644 ratings, while Evap Solutions averages 5.0 from 2 ratings.

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

Rebar Calc shows ads; Evap Solutions does not.

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

Rebar Calc ships an update every 2 months, and Evap Solutions every 3 weeks. Most recently, Rebar Calc was updated on October 29, 2026 and Evap Solutions on October 18, 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.*