App directory

SPLnFFT

Fabien Lefebvre

SPLnFFT measures environmental sound levels with a supported iPhone/iPad microphone setup.

Official information

What SPLnFFT does

SPLnFFT combines sound-level readings, frequency analysis, a signal generator and a dosimeter. It supports calibration and external microphones. Frequency views can be shared as snapshots; an optional purchase exports level history to Dropbox. That history contains sound levels over time, rather than the original audio. The developer also documents an advanced, user-configured HTTP export route.

How it compares

  • Frequency analysis as well as SPL Meter-style readings

    SPLnFFT combines Leq and peak readings with frequency analysis and a dosimeter. SPL Meter focuses on a live meter interface; SPL emphasizes saved measurements and export.

Features

Unless noted, features apply to iPhone and iPad.

Hearing checks & protection

  • Supported: Sound-level measurement
  • Supported: Noise-exposure dose
  • Supported: Microphone calibration
  • Supported: External measurement microphoneiPhone only
  • Supported: Noise-data export2
  • Supported: Noise metricsLAeq · Peak

Privacy & data

  • Supported: Data storage1Device · Personal cloud accountiPhone only
  1. Internally recorded app data and optional iCloud backup, not a claim that every export stays on device. A user-configured HTTP export sends location and a device identifier to the chosen host.
  2. The documented export is a frozen FFT image, with photo-library or email sharing; it does not establish raw measurement CSV export.

App Store ratings & reviews

61 ratings

Praise

  • Reviewers describe useful sound-level and frequency-analysis displays for sound-system checks or understanding noisy environments. Positive comments include 2024–2026 experiences as well as many historical versions.

Complaints

  • Isolated reports concern stopped operation in July 2026, paid-export/unlock frustration in September 2024, and an iPad slowdown in 2017. They concern different releases and do not establish prevalence.

Mixed reports

  • Older comments ask for easier-to-discover help or object to repeated prompts and Facebook-based support; other reviewers praise responsive developer help. Those 2013–2016 contact experiences do not describe today’s support channels.
  • Some older reviewers praise calibration or reference-meter agreement while others question readings, range or repeated calibration. These uncontrolled user comparisons do not establish measurement accuracy or certified performance.

App Store rating for the US store as of Nov 10, 2026. Review themes come from 104 sampled reviews. Read reviews on App Store

Details come from the developer’s official documentation and store listings, last checked Nov 11, 2026. We have not tested this app hands-on. Features can depend on your hearing devices, phone and plan, so confirm compatibility with the manufacturer.

Sources: apps.apple.com · drakkapps.com · Suggest a correction