# AWC Connection Calc vs CRSI Rebar Reference

The clearest difference is rating: CRSI Rebar Reference at 3.3 against AWC Connection Calc's 2.5. CRSI Rebar Reference also leads on ads (none vs shown) and review sentiment (33% vs 17%). AWC Connection Calc's advantage is in-app purchases (none vs 3) and update cadence (weekly vs every 5 weeks). On price, device support and iOS requirement there is nothing between them.

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

CRSI Rebar Reference holds the better App Store score, 3.3 against 2.5. That said, the two scores are not equally well evidenced: CRSI Rebar Reference has 16 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 17% of AWC Connection Calc's written reviews are positive against 33% of CRSI Rebar Reference's.

AWC Connection Calc ships an update weekly, CRSI Rebar Reference every 5 weeks. The most recent releases landed on June 7, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | AWC Connection Calc | CRSI Rebar Reference |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/awc-connection-calc/id704968564/reviews) | **[3.3 (16 ratings)](https://appshunter.io/ios/app/crsi-rebar-reference/id1423271565/reviews)** |
| Number of ratings | 2 | **16** |
| Positive reviews | 16.7% of reviews | **33.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 5 weeks |
| Monetization | Ad-supported | **Free** |
| Size | 156 MB | 51 MB |
| Requires iOS | **14.2** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [American Wood Council](https://appshunter.io/developer/380481346) | [Concrete Reinforcing Steel Institute](https://appshunter.io/developer/1423271564) |

## What reviewers say

### AWC Connection Calc

[App page](https://appshunter.io/ios/app/awc-connection-calc/id704968564)

Calculate capacities for various fasteners in wood connections, including single bolts, nails, and screws. Supports lateral and withdrawal capacities for wood-to-wood, wood-to-concrete, and wood-to-steel connections based on 2024 NDS standards.

**Highlights:** Calculate single bolt, nail, lag screw, and wood screw capacities, Determine lateral (single and double shear) capacities, Calculate withdrawal capacities, Supports wood-to-wood connections, Supports wood-to-concrete connections, Supports wood-to-steel connections, Based on 2024 NDS standards

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is AWC Connection Calc free?

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

### Is CRSI Rebar Reference free?

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

### Which has better reviews, AWC Connection Calc or CRSI Rebar Reference?

CRSI Rebar Reference is rated higher. AWC Connection Calc averages 2.5 out of 5 from 2 ratings, while CRSI Rebar Reference averages 3.3 from 16 ratings.

### Do AWC Connection Calc or CRSI Rebar Reference have ads?

AWC Connection Calc shows ads; CRSI Rebar Reference does not.

### Which is updated more often, AWC Connection Calc or CRSI Rebar Reference?

AWC Connection Calc ships an update weekly, and CRSI Rebar Reference every 5 weeks. Most recently, AWC Connection Calc was updated on June 7, 2026 and CRSI Rebar Reference on June 1, 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.*