SurveyNotes

Grade and Elevation Calculator

Free · Designed for iPad. Not verified for macOS.

Stop doing grade math in your head. SurveyNotes handles benchmark, backsight, HI, and rod calculations so you can focus on the work. SurveyNotes is a professional differential leveling tool built for surveyors, engineers, and contractors who need a reliable field book in their pocket. Set up your instrument in seconds. Enter your benchmark elevation and backsight rod reading and SurveyNotes instantly calculates your Height of Instrument. From there, enter any desired elevation and get the exact rod reading you need to hit grade. FIELD BOOK RECORDING Every shot you record is saved to a session-based field book — organized by instrument setup, exactly the way a real level book works. Each session stores your benchmark, backsight, HI, and every foresight shot with notes and timestamps. PROFESSIONAL PDF EXPORT Export any session as a clean, print-ready PDF formatted like a traditional differential leveling field book. Share it by email or AirDrop directly from the app. BUILT FOR THE FIELD • Works completely offline — no account, no internet required • Dark mode interface easy on the eyes in all lighting conditions • Custom measurement keyboard supporting decimal feet, feet-inches, and fractions to the nearest 1/16" • Sessions are saved automatically and available across app launches SURVEYING TERMINOLOGY SurveyNotes uses standard differential leveling terminology — Benchmark (BM), Backsight (BS), Height of Instrument (HI), and Foresight (FS) — so it fits naturally into any professional workflow. All data is stored locally on your device and never transmitted anywhere.

Ratings & Reviews

  • 5.0
    out of 5
    2 Ratings

New splash screen and app icon. Added top tab navigation with Calculator, As-Built, and Field Panel tabs. Design Library and Field Book now support swipe to delete and rename. New Field Panel Tab shows horizontal math breakdown (HI − Target = Rod).

Version 1.1

The developer, Nicholas VanderKlip, 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
    • Nicholas VanderKlip
    Size
    • 1.6 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 26.2 or later.
    • iPhone
      Requires iOS 26.2 or later.
    • iPad
      Requires iPadOS 26.2 or later.
    • Mac
      Requires macOS 26.2 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 26.2 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © N. Vanderklip 2026
  • Privacy Policy

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