Comparison

CRSI Rebar Reference vs PDF Scanner

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CRSI Rebar Reference

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
Read full description

QUICK REFERENCE! This ready reference app from the Concrete Reinforcing Steel Institute is a handy desk and field resource and includes information on ASTM standard reinforcing bars (rebar), standard hook details, standard stirrup/tie hook details, and ASTM reinforcing bar marking requirements. The app provides standard rebar specifications including sizes, diameters, areas and weights along with 90-, 135- and 180-degree hook details. Minimum yield and minimum tensile requirements per ASTM are also included. Industry standard bar markings for inch-pound rebar is illustrated for grades 40, 50, 60, 75, 80, 100 (A615), 100 (A1035), and 120. Links to the CRSI’s online resources are included.

About

PDF Scanner

Features
Read full description

【PDF Scanner】 helps you turn paper documents, photos, and existing files into organized PDFs. Scan, edit, annotate, sign, and protect documents from one convenient workspace. **Document Scanning** Capture paper pages with the camera or import images and local files. Combine multiple pages into a PDF that is ready to review, rename, organize, and share. **PDF Toolkit** Split, merge, compress, and normalize PDF files for different document workflows. Organize files with folders and move, rename, preview, or share them as needed. **OCR and Notes** Recognize text in scanned pages, review extracted content, and add line highlights with attached notes. Watermarks and annotations help you mark important information without changing the original source document. **Sign and Protect** Create, save, and reuse signatures across PDF pages. Add password protection to sensitive files and use Face ID for quicker access when biometric unlock is enabled. Keep everyday document work organized with scanning, PDF processing, text recognition, annotations, signatures, and file protection in one app. Download PDF Scanner and manage your documents wherever you go. Premium Account Pricing and Terms $ 9.99/week* $ 39.99/year* *The prices shown are in U.S. dollars. Actual charges may be converted to your local currency based on your country or region. Payment will be charged to your iTunes account at confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours before the end of the current period, and the renewal cost will be provided. Subscriptions may be managed by the user. Auto-renewal may be turned off by going to the user's account settings after purchase. Cancellation of the current subscription is not allowed during an active subscription period. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://dashingent.xyz/pdfwendangsaomiao/privacy.html

Screenshots

CRSI Rebar Reference4 screens
PDF Scanner4 screens

Verdict

The call

The clearest difference is device support: CRSI Rebar Reference at 3 against PDF Scanner's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CRSI Rebar Reference sells 3 one-off in-app purchases and PDF Scanner sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

CRSI Rebar Reference ships an update every 5 weeks, PDF Scanner every 2 months. The most recent releases landed on October 4, 2026 and October 17, 2026 respectively.

Scorecard1 real difference · 9 level
CRSI Rebar Reference versus PDF Scanner: the parameters behind the verdict, then further details
ParameterCRSI Rebar ReferencePDF Scanner
PriceFreeFree
Rating3.3 (16 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings16 — better—
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better16.0
Further details — not scored
Size51 MB18 MB
Age rating17+4+
DeveloperConcrete Reinforcing Steel InstituteDASHING ENTERPRISES LIMITED

In-app purchases

3 purchases

CRSI Rebar Reference

One-time3
  • CRSI - Rebar Identifier Module$2.99
  • CRSI Development Length ACI$4.99
  • CRSI Development length AASHTO$4.99
2 purchases

PDF Scanner

Subscriptions2
  • Weekly Nova3 Days trial$9.997 Days
  • Yearly Nova$39.991 Year

Questions

Is CRSI Rebar Reference free?
CRSI Rebar Reference is free to download, with in-app purchases available.
Is PDF Scanner free?
PDF Scanner is free to download, with in-app purchases available.
Do CRSI Rebar Reference or PDF Scanner have ads?
Neither CRSI Rebar Reference nor PDF Scanner shows ads.
Which is updated more often, CRSI Rebar Reference or PDF Scanner?
CRSI Rebar Reference ships an update every 5 weeks, and PDF Scanner every 2 months. Most recently, CRSI Rebar Reference was updated on October 4, 2026 and PDF Scanner on October 17, 2026.

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