Stormweir: Runoff Lab

Runoff, channels and storage

$1.99 · Designed for iPad. Not verified for macOS.

Civil stormwater workbench for Rational Method runoff, NRCS curve-number screening, detention routing, orifice/weir discharge, Manning channels, and storm scenarios. Stormweir: Runoff Lab is a focused, fully on-device app. Civil stormwater workbench for Rational Method runoff, NRCS curve-number screening, detention routing, orifice/weir discharge, Manning channels, and storm scenarios. KEY FEATURES - Rational and curve-number screens - Editable inflow/outflow routing - Orifice and storage metrics - Site-photo evidence - Editable sample data and CSV import - Side-by-side scenario comparison - Local PDF evidence export - Fifty-three original offline reference plates ONE-TIME AND PRIVATE - One paid download; no subscription or in-app purchase - No account, advertising, analytics, tracking, or developer-operated backend - Core features and bundled content work offline - Work remains on device unless you deliberately share or export it through an Apple system interface Hydraulic estimates are planning aids and do not predict flood safety. Verify survey data, rainfall criteria, local regulations, tailwater, blockage, and professional design review.

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The developer, Robert Corbin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

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    Accessibility

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    Information

    Seller
    • Robert Corbin
    Size
    • 92.8 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Age Rating
    4+
    Copyright
    • © 2026 Robert Corbin
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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