Audiofile Calc — LUFS, dB, Hz

Name: Audiofile Calc — LUFS, dB, Hz
Rating: 4.5 (13 reviews)
Author: Audiofile Engineering, LLC

By: Audiofile Engineering, LLC

Delay, SPL & Tempo Calculators

Features & Capabilities

NEW: dB Converter (free) and Varispeed pitch/BPM (Pro). 26 free audio engineering calculators. Calc Pro adds LUFS targets, batch mode, PDF share. $4.99 once.

The audio engineering calculator you've relied on for years — completely reimagined.

Audiofile Calc has been rebuilt from the ground up with a modern interface, ergonomic controls, and a new Calc Pro tier that takes your calculations further. Now with a free dB Converter for instant decibel-to-ratio conversions, and Varispeed — the pitch shift BPM calculator our users asked for.

FREE CALCULATORS

Length – Note Length – Bar Length – Song Length – Beats to Tempo – Time to Samples – Samples to Time – Timecode to Time – Compare Tempos – Change Tempo – Add Times

Pitch – Note Name to Frequency / MIDI / Wavelength – Frequency to Note Name / MIDI / Wavelength – Wavelength to Frequency / Note Name / MIDI

Timecode – Frames to Timecode – Convert Timecode – Change Timecode

Electric – Compare Power – Compare Voltage – NEW: dB Converter — turn any decibel value into its voltage (amplitude) and power ratios

Acoustics – Distance to Time – Delay – Time to Distance – Sound Pressure Level (SPL) – Panning – PAG-NAG

Files – File Size

CALC PRO — $4.99 one-time

Unlock a suite of advanced calculators built for professional engineers and producers:

– NEW: Varispeed — tape-style and sampler speed changes, where tempo and pitch are coupled. Enter any BPM change and get the pitch shift in semitones, sampler-ready semitones + cents, and speed percentage – LUFS Target — streaming loudness compliance for Spotify, Apple Music, YouTube, and broadcast (EBU R128) – Nyquist Frequency — sample rate requirements, aliasing thresholds, anti-aliasing filter cutoffs – Equal Loudness — Fletcher-Munson curves, equal-loudness compensation – Cable Attenuation / Impedance — signal loss over cable runs, impedance matching – Batch Conversion — sweep values through any calculator simultaneously – PDF Share — export any calculation as a clean, professional PDF ready for clients, session notes, or technical documentation

One-time purchase. No subscription.

Audiofile is a boutique technology company building precision tools for the world's musicians and engineers.

User Growth & Download Statistics

App

By:

Audiofile Engineering, LLC

Rating:

4.50

(13)

Version:

4.3 Last updated: 2026-06-11

Version code:

886799963

Creation date:

2009-12-04

Compatible devices:

Size:

1.16MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-28

Compare stats and ranking:

Ranking

# 347,638 ▼ 947

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Audiofile Engineering, LLC

Apple Apps Store

https://apps.apple.com/us/app/audiofile-calc-lufs-db-hz/id337547274

Website:

http://audiofile.engineering/

User Reviews

Audiofile Calc is widely praised as indispensable for audio work, offering a comprehensive, free toolkit that streamlines workflows and is easy to use. However, reviewers repeatedly note compatibility issues with newer iOS versions and 32-bit support, input/precision and UI usability gaps, and concerns about ads or upgrade pricing. Despite these, its usefulness, breadth of tools, and solid design keep it highly regarded when it runs smoothly.

Pros

Extremely useful and time-saving for audio engineers.
Broad, integrated set of calculators and tools for studio workflows.
Free to use with a clean, intuitive, easy-to-learn interface.
Generally accurate and stable when it runs properly with good design.

Cons

OS compatibility issues with newer iOS versions and 32-bit device support, leading to non-functionality on some devices/updates.
Input and UI limitations, including limited decimal precision, hard-to-adjust bottom controls, and occasional input problems.
Monetization and upgrade model concerns, such as ads after upgrading and confusion about what is free vs paid.
Desire for more calculations and features (e.g., additional acoustic calculations) and improved precision in certain functions.

Recent reviews

I (try) to make music. Mostly sample based, "boom bap" hip hop type stuff. While I (try) to make the music based on the feel, vibe, and "using my ear"; my more math oriented/logic brain often trumps the other. So this is a great app that I use quite a bit, when that part of my brain is winning over the other. In certain situations. Would looove to see a "pitch shift bpm loop calculator" feature added though. What I mean by that is a calculator that solves for X. Where X would be the number of semitones a loop of 100 bpm needs to be shifted, to make the loop 110 bpm instead. As an example. Or vice versa, etc etc...

by To*****, 2022-03-31

Instantly helped me trouble shoot a problem. A couple of the parameters are the bottom of the screen can’t be adjusted easily because of a UX issue but otherwise fantastic