# GDTPro: GD&T ASME Calculator

> GDTPro: GD&T ASME Calculator (iPhone/iPad app by Huseyin Ataseven.)

- Source: https://appshunter.io/ios/app/gdtpro-gd-and-t-asme-calculator/id6758917712 (this page in markdown: same URL + `.md`)
- Developer: [Huseyin Ataseven](https://appshunter.io/developer/1857397718)
- Category: Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 9 MB
- Languages: English, Turkish
- Released: 2026-04-03
- Data updated: 2026-07-17
- User reviews in markdown: https://appshunter.io/ios/app/gdtpro-gd-and-t-asme-calculator/id6758917712/reviews.md

## What is GDTPro?

GD&T Pro is the most comprehensive geometric dimensioning and tolerancing toolkit on iOS. Built for engineers, students, and inspectors, it puts ASME Y14.5-2018 and ISO GPS in your pocket — completely offline.

FREE FEATURES

• Symbol Reference — All 14 geometric characteristics with descriptions, key principles, and common mistakes.
• FCF Builder — Build, validate, and export feature control frames with live preview and real-time error detection.
• Bonus Tolerance Calculator — MMC/LMC bonus with step-by-step formula breakdowns.
• Unit Conversion — mm to inch, 1-6 decimal places.
• Dual Standard — Switch ASME Y14.5-2018 and ISO GPS anytime. Symbols, rules, and guidance adapt automatically.
• Save Projects — Organize FCFs, calculations, and stackups by project.

PRO — UNLOCK THE FULL TOOLKIT

8 advanced calculators with step-by-step solutions:

• Virtual Condition — Worst-case boundaries for MMC/LMC on internal and external features.
• Resultant Condition — Opposite boundary from VC for complete analysis.
• Positional Tolerance — Floating and fixed fastener patterns with configurable split ratios.
• Tolerance Stackup — Worst-case (100%) and RSS statistical analysis side-by-side.
• Profile Tolerance — Bilateral, unilateral, and UZ profile disposition analysis.
• Composite Tolerance — PLTZF vs FRTZF comparison with refinement ratios.
• Datum Shift — Additional tolerance from datum departure at MMB.
• Zero-at-MMC — Zero tolerance at MMC where VC equals MMC.

Plus:
• 3D Datum Reference Frame Visualizer with interactive rotation
• 2D Tolerance Zone Visualization for 8 zone types
• Camera OCR Scanner — extract FCFs from engineering drawings
• CAD Import — STEP AP242 files with PMI extraction
• PDF Report Export — professional reports for design reviews
• Unlimited Projects

WHY GD&T PRO

- 100% Offline — works anywhere, zero internet required
- Zero Data Collection — your data stays on your device
- Step-by-Step Solutions with standard references
- Expert Guidance — real-time tips as you work
- Student Mode — extra explanations for learning

Built by engineers, for engineers. Aerospace, automotive, medical devices, manufacturing — this is the GD&T companion you have been waiting for.

Download free today. Upgrade to Pro for the full toolkit.

Terms of Use: https://fluxrtx18-source.github.io/gdtpro-legal/terms-of-use/
Privacy Policy: https://fluxrtx18-source.github.io/gdtpro-legal/privacy-policy/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| GDTPro: GD&T ASME Yearly | $99.99 | per year |
| GDTPro: GD&T ASME Monthly | $14.99 | per month |



## Version history (last 1 release)

### 1.0 — 2026-04-03

No release notes.

## More apps by Huseyin Ataseven

- [Macro Meals: Diet & Plan](https://appshunter.io/ios/app/macro-meals-diet-and-plan/id6760219740)
- [Detoxify: Sobriety Tracker](https://appshunter.io/ios/app/detoxify-sobriety-tracker/id6760777444)
- [ReplAI: AI Relationship Coach](https://appshunter.io/ios/app/replai-ai-relationship-coach/id6761669871)
- [QuizzerAI](https://appshunter.io/ios/app/quizzerai/id6761802396)
- [ReviewReply: AI Assistant](https://appshunter.io/ios/app/reviewreply-ai-assistant/id6761866603)

All apps by Huseyin Ataseven: https://appshunter.io/developer/1857397718

---

*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 2026-07-17.*