Heel Drop: Floor Vibration

Structural FFT & PSD Analyzer

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Real FFT and PSD from your own accelerometer. Free AISC DG11 comparison. No external hardware required. Heel Drop turns your phone into a real vibration-analysis instrument. Every FFT spectrum comes from your own accelerometer, computed live. No external hardware required. See live time-domain, FFT, and power spectral density views while you record. Save sessions to a history list with peak frequency and RMS acceleration. Export raw data to CSV or a professional PDF report. Every report includes a free comparison against AISC Design Guide 11 walking-excitation limits. This is a simplified reference for engineering judgment, not a certified compliance calculation. You interpret the result, same as with any raw instrument reading. Built for structural and civil engineers, architects, and NVH technicians doing floor-serviceability checks. Bay slabs, mezzanines, gyms, rooftop equipment platforms. One phone, one measurement, no setup. Free tier includes live time-domain and FFT views with peak-frequency detection, saved sessions, and PDF reports. Heel Drop Pro adds PSD analysis, velocity and displacement integration, raw CSV export, and unlimited saved sessions. A phone-level check runs before every recording, so you know when tilt is contaminating the vertical reading. Heel Drop reports raw measured data from a consumer-grade accelerometer. It is not a certified compliance tool and does not replace a licensed engineer's judgment. SUBSCRIPTION TERMS Heel Drop Pro is an auto-renewable subscription, available monthly or annually. Prices are shown in the app in your local currency. Payment is charged to your Apple ID account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the period ends. You can manage or cancel your subscription in your App Store account settings after purchase. Terms of Use (EULA): https://codeensis.com/heeldrop/terms Privacy Policy: https://codeensis.com/heeldrop/privacy

Ratings & Reviews

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Improved internal diagnostics so purchase and restore problems can be detected and fixed faster. Listing now available in German, Italian and Spanish. No changes to how measurements are taken or reported.

Version 1.0.1

The developer, CODEENSIS LTD, 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 Linked to You

    The following data may be collected but it is not linked to your identity:

    • Diagnostics

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
CODEENSIS LTD
Size
32.8 MB
Category
Utilities
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
  • Heel Drop Pro — Monthly $14.99
  • Heel Drop Pro — Annual $119.99
  • Learn More
Copyright
© CodeEnsis Ltd, 2026
  • Developer Website
  • Privacy Policy
  • License Agreement

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