# CRSI Rebar Reference vs binni concrete

The clearest difference is rating: binni concrete at 5.0 against CRSI Rebar Reference's 3.3. binni concrete also leads on in-app purchases (none vs 3). CRSI Rebar Reference's advantage is ratings volume (16 vs 1). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. CRSI Rebar Reference sells 3 one-off in-app purchases. binni concrete asks for nothing beyond the download.

binni concrete holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: CRSI Rebar Reference has 16 ratings behind it against 1, so its average is the more settled of the two.

CRSI Rebar Reference ships an update every 5 weeks, binni concrete every 3 weeks. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | CRSI Rebar Reference | binni concrete |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (16 ratings)](https://appshunter.io/ios/app/crsi-rebar-reference/id1423271565/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/binni-concrete/id1468981044/reviews)** |
| Number of ratings | **16** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 51 MB | 25 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Concrete Reinforcing Steel Institute](https://appshunter.io/developer/1423271564) | [binni](https://appshunter.io/developer/1462593460) |

## What reviewers say

### CRSI Rebar Reference

[App page](https://appshunter.io/ios/app/crsi-rebar-reference/id1423271565)

Access essential data for reinforcing bars (rebar) including specifications, hook details, and marking requirements. This app serves as a quick reference for industry standards and links to online resources.

**Highlights:** ASTM standard reinforcing bar specifications, Standard hook details (90, 135, 180 degrees), Stirrup/tie hook details, ASTM reinforcing bar marking requirements, Minimum yield and tensile requirements, Links to CRSI online resources

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CRSI - Rebar Identifier Module | $2.99 | one-time |
| CRSI Development Length ACI | $4.99 | one-time |
| CRSI Development length AASHTO | $4.99 | one-time |


### binni concrete

[App page](https://appshunter.io/ios/app/binni-concrete/id1468981044)

This app helps construction teams collaborate and manage concrete pours. It supports teams from scheduling to final lab test results, streamlining project workflows.

**Highlights:** Concrete pour tracking, Team collaboration, Look-ahead scheduling, Lab test result management, Project workflow streamlining

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CRSI Rebar Reference free?

CRSI Rebar Reference is free to download, with in-app purchases available.

### Is binni concrete free?

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

### Which has better reviews, CRSI Rebar Reference or binni concrete?

binni concrete is rated higher. CRSI Rebar Reference averages 3.3 out of 5 from 16 ratings, while binni concrete averages 5.0 from 1 ratings.

### Do CRSI Rebar Reference or binni concrete have ads?

Neither CRSI Rebar Reference nor binni concrete shows ads.

### Which is updated more often, CRSI Rebar Reference or binni concrete?

CRSI Rebar Reference ships an update every 5 weeks, and binni concrete every 3 weeks. Most recently, CRSI Rebar Reference was updated on November 2, 2026 and binni concrete on November 7, 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.*