# Deflection Lite vs CRSI Rebar Reference

The clearest difference is rating: Deflection Lite at 4.5 against CRSI Rebar Reference's 3.3. Deflection Lite also leads on in-app purchases (none vs 3) and review sentiment (44% vs 33%). CRSI Rebar Reference's advantage is update cadence (every 5 weeks vs every 3 months). On price, ratings volume, ads and device support there is nothing between them.

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

Deflection Lite holds the better App Store score, 4.5 against 3.3. Both are backed by a comparable volume of ratings — 46 and 16 respectively. Written reviews point the same way: 44% of Deflection Lite's written reviews are positive against 33% of CRSI Rebar Reference's.

Deflection Lite ships an update every 3 months, CRSI Rebar Reference every 5 weeks. The most recent releases landed on September 17, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Deflection Lite | CRSI Rebar Reference |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (46 ratings)](https://appshunter.io/ios/app/deflection-lite/id974474071/reviews)** | [3.3 (16 ratings)](https://appshunter.io/ios/app/crsi-rebar-reference/id1423271565/reviews) |
| Number of ratings | **46** | 16 |
| Positive reviews | **44.4% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 108 MB | 51 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Blue Ketchep](https://appshunter.io/developer/1131834248) | [Concrete Reinforcing Steel Institute](https://appshunter.io/developer/1423271564) |

## What reviewers say

### Deflection Lite

[App page](https://appshunter.io/ios/app/deflection-lite/id974474071)

This app provides interactive and precise structural beam analysis. Easily visualize beam bending by dragging loads and supports, and calculate key engineering results like reactions, shear force, and bending moment.

**Highlights:** Interactive beam bending visualization, Calculate reactions, shear force, and bending moment, Built-in cross-section databases, Unlimited loads and supports, Export design to shareable permalink, Metric and standard units

**Features:** Vision Pro support

**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 Deflection Lite free?

Deflection Lite 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, Deflection Lite or CRSI Rebar Reference?

Deflection Lite is rated higher. Deflection Lite averages 4.5 out of 5 from 46 ratings, while CRSI Rebar Reference averages 3.3 from 16 ratings.

### Do Deflection Lite or CRSI Rebar Reference have ads?

Neither Deflection Lite nor CRSI Rebar Reference shows ads.

### Which is updated more often, Deflection Lite or CRSI Rebar Reference?

Deflection Lite ships an update every 3 months, and CRSI Rebar Reference every 5 weeks. Most recently, Deflection Lite was updated on September 17, 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.*