# UTCal — UT & NDT Field Calculator

> UT & NDT Field Calculator (iPhone/iPad app by Tomas Ramirez.)

- Source: https://appshunter.io/ios/app/utcal/id6762418371 (this page in markdown: same URL + `.md`)
- Developer: [Tomas Ramirez](https://appshunter.io/developer/1894095882)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.6 · 3 MB
- Languages: English
- Released: 2026-04-20
- Data updated: 2026-09-15
- User reviews in markdown: https://appshunter.io/ios/app/utcal/id6762418371/reviews.md

## What is UTCal?

Your UT Bible, built for the field. Skip distance, D1.1 acceptance, beam path diagrams, encoder calibration, pipe data, and code criteria — offline, right in your pocket.

Built by a working NDT tech for working NDT techs. No account. No internet. No subscription. Runs entirely on-device.

CALCULATOR
• Skip distance, half skip, and full skip for any angle and thickness
• Beam spread — near-field distance, half-angle, and full spread
• AWS D1.1 indication rating
• Fracture mechanics — critical flaw size & ASME VIII Div 2/3 evaluation
• Transfer correction (dB)
• Encoder step resolution converter — steps/mm ↔ steps/in, with target-distance conversion for OmniScan calibration
• Imperial and metric — switch units anytime

BEAM PATH DIAGRAM
• Interactive cross-section of your beam path through the material
• Drag the probe to see coverage and position change in real time
• Rotate to landscape for a fullscreen diagram

WELD OVERLAY
• Overlay Single V or Double V weld joint profiles on the beam path diagram
• 5 standard weld presets, or enter custom bevel angle, root opening, and root face
• Index offset — see where your probe index point sits relative to the weld centerline

PIPE DATA
• NPS 1/8" through 48" per ASME B36.10M
• OD, ID, wall thickness, and scan length for every standard schedule
• Stainless steel schedules where wall thickness differs from carbon steel (dual ASME standard support)
• Apple Watch companion — quick pipe lookups on your wrist

CODE ACCEPT/REJECT CRITERIA
• ASME Section V, Article 4
• ASME B31.3 — Process Piping
• AWS D1.1 — Structural Welding
• API 1104 — Pipeline Welding
• Inches and millimeters, side by side

SETUPS & HISTORY
• Build and save complete job setups — material, angle, frequency, weld geometry, and notes
• Save calculation results with names and notes, then recall them in one tap for your records
• Custom presets for your most-used configurations

FREE & PRO
• Free to download — skip distance, Snell's law, and a hands-on trial of every Pro tool
• The full pipe chart is free for your first 10 lookups, then part of Pro
• UTCal Pro unlocks unlimited use of everything: the full pipe chart, saved calculation history, custom presets & weld builder, encoder calculator, fracture mechanics, beam path diagrams, weld overlay, the full code library, and the Apple Watch app
• One-time purchase — no subscription, ever

WHY UTCAL
• Built by a UT tech who got tired of doing skip math on a paper napkin
• Works on the roof, in the ditch, in the shop — no signal required
• Updated for the latest ASME, AWS, and API editions

Questions or feature requests: support.utcal@carboncode.app

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| UTCal Pro | $14.99 | one-time |



## Version history (last 4 releases)

### 1.2.2 — 2026-06-26

NEW — Calculation History (Pro)
Save your skip-distance results — inputs, outputs, and notes — and pull any of them back up in one tap. Built for documenting what you ran on a job. Manage your full history from Settings.

Pipe Chart
The full pipe schedule chart is now free for your first 10 lookups, then unlimited with UTCal Pro.

Plus refinements and fixes under the hood.

Questions or feature requests: support.utcal@carboncode.app

### 1.2.1 — 2026-05-21

v1.2 — New & Improved

• Encoder step resolution converter — convert steps/mm ↔ steps/in and target distance for OmniScan calibration
• Stainless steel pipe schedules added (dual ASME standard support where SS wall thickness differs from carbon steel)
• 3-use free trial for code references and advanced calculators — try before you upgrade to Pro
• Beam Spread and Transfer Correction calculators now include a free trial

Thanks for the feedback — keep it coming at support.utcal@carboncode.app

### 1.2 — 2026-05-05

Code references and advanced calculators now include a 3-use preview before requiring Pro. Beam Spread and Transfer Correction calculators now offer a trial before locking.

### 1.0 — 2026-04-20

No release notes.

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## More apps by Tomas Ramirez

- [FormulaPulse](https://appshunter.io/ios/app/formulapulse/id6762660256)

All apps by Tomas Ramirez: https://appshunter.io/developer/1894095882

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-15.*