InspCorr Pro vs UTCal
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
InspCorr Pro
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InspectPro is an offline toolkit for refinery inspection and corrosion engineers. Covers welding procedures (API 582), coating selection, t-min calculations, corrosion rate analysis, fitness-for-service screening (API 579), damage mechanism reference (API 571), and field inspection notes with PDF export.
UTCal
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Your UT Bible, built for the field. Skip distance, D1.1 acceptance, beam path diagrams, encoder calibration, pipe data, and code criteria ā 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 ā near-field distance, half-angle, and full spread ⢠AWS D1.1 indication rating ⢠Fracture mechanics ā critical flaw size & ASME VIII Div 2/3 evaluation ⢠Transfer correction (dB) ⢠Encoder step resolution converter ā steps/mm ā steps/in, with target-distance conversion for OmniScan calibration ⢠Imperial and metric ā 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 ā 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 ā quick pipe lookups on your wrist CODE ACCEPT/REJECT CRITERIA ⢠ASME Section V, Article 4 ⢠ASME B31.3 ā Process Piping ⢠AWS D1.1 ā Structural Welding ⢠API 1104 ā Pipeline Welding ⢠Inches and millimeters, side by side SETUPS & HISTORY ⢠Build and save complete job setups ā 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 ā 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 ā 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 ā no signal required ⢠Updated for the latest ASME, AWS, and API editions Questions or feature requests: support.utcal@carboncode.app
Screenshots
Verdict
The clearest difference is in-app purchases: InspCorr Pro at none against UTCal's 1. On price, update cadence, ads and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. UTCal sells 1 one-off in-app purchase. InspCorr Pro asks for nothing beyond the download.
Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on May 15, 2026 and September 15, 2026 respectively.
| Parameter | InspCorr Pro | UTCal |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Fortnightly |
| Ads | No | No |
| In-app purchases | No ā better | Yes |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 17.6 | 17.6 |
| Further details ā not scored | ||
| Size | 6 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Fahad Alzoabi | Tomas Ramirez |
In-app purchases
InspCorr Pro
No in-app purchases
UTCal
- UTCal Pro$14.99





