--- title: "GDTPro: GD&T ASME Calculator - Reviews, Revenue and Downloads in United States | Apple App Store" description: "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" --- # GDTPro: GD&T ASME Calculator — United States > Mechanical Design & QA Tools ![GDTPro App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/14/5f/85/145f8574-ff62-0e92-eb2c-7c64d1b85135/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png) **Developer:** [Huseyin Ataseven](https://apptail.io/developer/huseyin-ataseven-ClmKOb) **Category:** Productivity **Rating:** 1.0/5 (1 ratings) **Price:** Free **Bundle ID:** ATASEVEN.GDTPro **Store:** Apple App Store **Country:** United States **Version:** 1.0 (released 2026-04-03) **Original Release:** 2026-04-03 **Languages:** English, Turkish **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6758917712) **AppTail Page:** [https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/united-states](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/united-states) ## GDTPro Description 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: Privacy Policy: ## GDTPro Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/bd/01/f4/bd01f447-b8b4-1586-d04e-bd1055b2ecc1/01_Symbol_Library.png/1206x2622.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/1a/92/c9/1a92c9a1-a390-6f56-e563-21e9c97d2198/02_Symbol_Detail.png/1206x2622.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/8a/c4/fb/8ac4fb49-6f44-d077-5e24-383cf58f1761/03_FCF_Builder.png/1206x2622.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/32/dd/12/32dd12cf-af7e-361f-9fe2-5d19b2977c96/04_Calculator_Hub.png/1206x2622.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/c6/be/e2/c6bee267-f63f-63e0-4be9-8b94939cf0ca/05_Bonus_Tolerance.png/1206x2622.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/6d/c3/d0/6dc3d0dd-1612-818c-fdd9-1cc47f99a796/06_Tolerance_Stackup.png/1206x2622.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/b7/6f/0d/b76f0d91-aacf-7db5-02a5-d8c8a851d250/07_Projects.png/1206x2622.png) - [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/78/b6/19/78b61948-e8a4-dba3-463e-f04336b60d02/08_Settings.png/1206x2622.png) ## GDTPro Rating Breakdown in United States - 5 stars: 0 (0%) - 4 stars: 0 (0%) - 3 stars: 0 (0%) - 2 stars: 0 (0%) - 1 stars: 1 (100%) ## GDTPro Available In - [China](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/china) - [United States](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/united-states) - [Türkiye](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/turkey) - [Switzerland](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/switzerland) - [Czechia](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/czechia) - [Dominican Republic](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/dominican-republic) - [Ireland](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/ireland) - [Japan](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/japan) - [South Korea](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/south-korea) - [Mexico](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/mexico) - [Netherlands](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/netherlands) - [Ukraine](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/ukraine) - [Angola](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/angola) - [Vietnam](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/vietnam) - [Belgium](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/belgium) - [Canada](https://apptail.io/app/gdtpro-gdt-asme-calculator-dqYz/canada) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. 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