FloRun

FlowRate Calculator.

Only for iPhone

$3.99 · Designed for iPhone. Not verified for macOS.

iPhone

FloRun is a focused, offline flow-rate utility for environmental field workers — wastewater operators, stormwater inspectors, SWPPP staff, and anyone who needs to estimate flow at decants, impoundments, outfalls, and streams. TWO WAYS TO MEASURE • Timed Volume — Use the built-in stopwatch to time a flow capture, then enter the volume in mL, liters, fluid ounces, or US gallons. FloRun converts to gallons per minute, hour, and day instantly. • V-Notch Weir — Switch to the weir tab, choose 90° or 60° notch, and enter the head height in inches. Flow rate appears immediately from the published triangular-notch discharge chart. No stopwatch required. SAVE, REVIEW, AND EXPORT Save up to 25 measurements with optional site labels, notes, and (with permission) GPS coordinates. The History tab keeps everything reachable for editing or reference. When you need a record: • Export a single measurement as a formatted PDF, complete with all readings, units, location, and notes. • Export your entire saved history as a paginated PDF table. • Export the full history as a CSV for use in Numbers, Excel, or Google Sheets. PRIVACY BY DESIGN FloRun stores everything locally on your device. It does not transmit data over a network, does not use analytics or tracking, and does not include any third-party SDKs. Location is captured only when you explicitly tap Save Measurement, and only if you have granted permission. Uninstalling the app removes all data. BUILT FOR THE FIELD • Large, high-contrast controls and big tap targets for use with gloves and in sunlight. • Hundredths-of-a-second stopwatch using a monotonic clock. • Recovery prompt if the app is closed mid-run. • Screen stays awake while the timer is running. • Full Dynamic Type and Dark Mode support. • Works completely offline — no internet required. IMPORTANT — ASSISTANCE AID ONLY FloRun is intended as an assistance aid. Results are estimates and may contain errors from chart interpolation, transcription, input precision, or device timing. The app is provided "AS IS" with no warranty of accuracy. For regulatory reporting, compliance documentation, or any critical decision, always verify results with calibrated instruments and qualified personnel.

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

Fixed issue with photo stored sizes.

Version 1.3

The developer, Jordan Rose, 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.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Jordan Rose
    Size
    971.8 KB
    Category
    Utilities
    Compatibility
    Requires iOS 17.6 or later.
    • iPhone
      Requires iOS 17.6 or later.
    • Mac
      Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © Jordan Rose 2026
  • Privacy Policy

    • Supports

    • Family Sharing

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