Offset3D launching November 2026

Trade math, solved on paper.
Now solved in 3D.

Mobile apps and Revit add-ins built by a working VDC manager and sheet metal detailer. Replace cardboard wheels, napkin sketches, and $80 hardware calculators with tools that actually show you the geometry.

Explore the apps Get MEP Toolkit $0.99 each · No subscriptions
Beta testers needed — join for $0.99 an app →
Pipe Schematic Pro app screen
Offset3D rolling offset app screen
Interactive Ductulator app screen
25+
years detailing experience
5
apps + Revit add-in
$0
subscriptions · ever
100%
offline-capable in the field
The portfolio

Five apps. One philosophy.
Show the geometry.

Every tool replaces something outdated, a cardboard wheel, a napkin sketch, an $80 hardware device, with a visual mobile app you can actually use in the field.

$0.99
Offset3D screen
Offset3D New
See your rolling offset in 3D. Drag handles to set rise, roll, and offset. Travel and cut length update in real time. Replaces the $80 hardware calculator.
  • Interactive 3D pipe model
  • Simple + rolling offset modes
  • Learning Mode shows the formula
  • Built-in fitting takeouts
Read the story →
📐
$0.99
Pipe Schematic Pro screen
Pipe Schematic Pro
Professional pipe drawings on your phone. Fittings library, auto-generated bill of materials, multi-page projects, PDF export.
  • Angle snapping (0° to 90°)
  • 10+ fitting types
  • Auto BOM with PDF export
  • Multi-page JSON projects
Learn more →
💨
$0.99
Ductulator screen
Interactive Ductulator
HVAC duct sizing with four profiles side by side. Visual scaled shapes, ASHRAE-compliant calculations, snap to standard sizes.
  • 4 simultaneous duct profiles
  • CFM, velocity, friction loss
  • 5 duct materials
  • Visual scaled shapes
Learn more →
⚖️
$0.99
Point Load Calculator screen
Point Load Calculator
Drag-and-drop point loads onto a beam diagram. Real-time hanger reactions, scenario comparison, save/load JSON projects.
  • Up to 10 point loads per beam
  • Real-time beam reactions
  • Hide/show load scenarios
  • Share results with the team
Learn more →
$0.99
StairBuilder screen
StairBuilder
3D stair designer with IBC, IRC, and ADA code compliance checks. Interactive stair model, auto BOM, multi-flight L and U shapes.
  • IBC / IRC / ADA compliance
  • Interactive 3D stair model
  • Auto Bill of Materials
  • Multi-flight (L / U shape)
Learn more →
$0.99
MEP Toolkit launcher
MEP Toolkit 3-in-1
All three core tools in one app. Pipe Schematic Pro + Ductulator + Point Load Calculator. Buy once, use forever.
  • 3 apps, one $0.99 purchase
  • One icon, one launcher
  • No subscriptions, no ads
  • Lifetime updates
Get the bundle →
Launching November 2026

The pipe offset calculator that finally shows you the geometry.

Existing pipe-trades calculators give you the number but not the understanding. Offset3D gives both. An interactive 3D pipe model as the primary interface, with the math exposed step-by-step for learning.

🧊 See it in 3D
Rotate, pan, zoom an interactive pipe model
🧮 Two modes
Simple offset + rolling offset (3D)
📚 Learning Mode
Toggle "fx" to see the formula with your numbers
📤 Export PDF
Annotated diagram with inputs and results
The old way
Pipe Trades Pro
$40/yr
or $80 hardware. No 3D. Subscription model.
Offset3D
3D pipe calculator
$0.99
One $0.99 purchase. 3D visualization. Learning mode.
Offset3D Rolling 3D mode showing rise, roll, offset inputs with the 3D pipe model and computed travel, angle, and cut length
Live model — drag to rotate
For the office

See 'n' Say.
The Revit add-in built for MEP detailers.

🔍

See 'n' Say

REVIT ADD-IN

14 professional tools for inspecting, identifying, and organizing elements. Built for real detailing workflows by someone who runs them every day.

Inspection

  • ✓ Element Visibility
  • ✓ Sync Views
  • ✓ Find Sheet
  • ✓ Snoop Selection

Identification

  • ✓ Renumber Elements
  • ✓ Place Tags
  • ✓ Check Duct Orientation
  • ✓ Rotate Multiple
Buy Now — $39.99 Full Details → Join the beta → Windows installer · Revit 2024 & 2025 · Lifetime updates
New · Chrome extension for Autodesk Forma

JGT Forma Model Coordination Tools

Copy Revit Element IDs straight out of Forma Model Coordination, plus the Navisworks-style tools you miss in the browser.

  • ✓ Free: copy Element IDs ready for Revit's Select by ID, or with name and file for Excel
  • ✓ Pro: Find by Element ID, Quick Properties, Select Same, Appearance Profiler
  • ✓ Pro: export to CSV or Excel with takeoff totals, and clash objects by level
See all the tools Coming soon to the Chrome Web Store

Not affiliated with or endorsed by Autodesk, Inc. Autodesk and Forma are registered trademarks or trademarks of Autodesk, Inc.

New · Chrome extension for Autodesk Forma

JGT Forma Clash Export

Turn the Forma Model Coordination clash list into a rated Excel report and a ready-to-import Navisworks handoff.

  • ✓ Free: Excel clash report with Consequential / Review / Inconsequential ratings you control
  • ✓ Pro: Navisworks saved viewpoints for every clash group, foldered by rating
  • ✓ Pro: Navisworks search sets that select each group's clashing elements
See how it works Coming soon to the Chrome Web Store

Not affiliated with or endorsed by Autodesk, Inc. Autodesk, Forma and Navisworks are registered trademarks or trademarks of Autodesk, Inc.

New · Plugins for Navisworks Manage 2026

JGT Navisworks Tools

Revit Element IDs, section planes, and saved views with markup, one click away inside Navisworks.

  • ✓ Element ID: copy Revit Element IDs for Select by ID, or with name and file for Excel
  • ✓ Section: all six section planes and the box in one pane, in feet and inches
  • ✓ Views: saved viewpoints, comments and markup in one pane
Try free for 30 days Launch price $4.99 each, $8.99 for all three

Not affiliated with or endorsed by Autodesk, Inc. Autodesk, Navisworks and Revit are registered trademarks or trademarks of Autodesk, Inc.

"
It's the first calculator that lets my apprentices see the pipe before they cut it. Learning mode does in 30 seconds what takes me 10 minutes on a whiteboard.
J
JATC Instructor
Sheet Metal Workers Local
Why JGriffith Tech

Tools built by someone
who actually does the work.

🔧

Built by a Detailer

Created by a VDC manager with 25+ years in MEP detailing. Every tool is designed to work the way detailers actually think.

📱

Field-First Design

Designed for phones and tablets first. Large touch targets, offline capable, built for jobsite conditions.

🔒

Zero Data Collection

No accounts, no analytics, no tracking. Your project data stays on your device. Period.

🔄

Lifetime Updates

Active development with feature requests from real users. One-time purchase, lifetime updates. No subscriptions.

Stop calculating on cardboard.
Start calculating in 3D.

Five mobile apps and a Revit add-in. One philosophy: visual tools for visual work.

Get the MEP Toolkit — $0.99 See Offset3D →
New · Career playbook

The Detailer's Path

The 90-day plan for moving from the trade into MEP detailing and VDC. What to learn and in what order, portfolio projects you can build without a detailing job, resume translation, interview prep, and a field math card.

Get the playbook — $29

Already detailing? Volume 2: the Project Field Guide shows you how to run any MEP project. Both volumes: $45 bundle.

Apprentices and students: code JATC for 50% off

Get in Touch

Questions, feature requests, or just want to talk shop? Reach out.

✉️

Email

Best for feature requests, bug reports, and general questions.

jeremiah@jgriffithtech.com