Comparison

CRSI Rebar Reference vs TBM Post Tension

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

TBM Post Tension

Features
Read full description

binni's TBM production tracker makes it very easy for tunneling construction teams to collaborate while managing operation and quality during tunnel construction operations. It will support your teams to report production and quality of your operation and to visualize multiple insights and sensor data generated by your TBM. This is an enterprise application and it's subscription is only available for organizations. Please refer to your employer for access to the features of this application.

Screenshots

CRSI Rebar Reference4 screens
TBM Post Tension4 screens

Verdict

The call

The clearest difference is in-app purchases: TBM Post Tension at none against CRSI Rebar Reference's 3. On price, update cadence, ads and device support 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. TBM Post Tension asks for nothing beyond the download.

UpkeepUpdate frequency

CRSI Rebar Reference ships an update every 5 weeks, TBM Post Tension every 3 months. The most recent releases landed on October 21, 2026 and October 27, 2026 respectively.

Scorecard1 real difference · 9 level
CRSI Rebar Reference versus TBM Post Tension: the parameters behind the verdict, then further details
ParameterCRSI Rebar ReferenceTBM Post Tension
PriceFreeFree
Rating3.3 (16 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings16 — better—
Update frequencyEvery 5 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.1 — better15.6
Further details — not scored
Size51 MB23 MB
Age rating17+4+
DeveloperConcrete Reinforcing Steel Institutebinni

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
None

TBM Post Tension

No in-app purchases

Questions

Is CRSI Rebar Reference free?
CRSI Rebar Reference is free to download, with in-app purchases available.
Is TBM Post Tension free?
TBM Post Tension is free to download, with no in-app purchases.
Do CRSI Rebar Reference or TBM Post Tension have ads?
Neither CRSI Rebar Reference nor TBM Post Tension shows ads.
Which is updated more often, CRSI Rebar Reference or TBM Post Tension?
CRSI Rebar Reference ships an update every 5 weeks, and TBM Post Tension every 3 months. Most recently, CRSI Rebar Reference was updated on October 21, 2026 and TBM Post Tension on October 27, 2026.

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