# Audiofile Calc — LUFS, dB, Hz > Audio engineering calculator for musicians and producers with free and pro tiers. (iPhone/iPad app by Audiofile Engineering, LLC.) - Source: https://appshunter.io/ios/app/audiofile-calc-lufs-db-hz/id337547274 (this page in markdown: same URL + `.md`) - Developer: [Audiofile Engineering, LLC](https://appshunter.io/developer/309378687) - Category: Music, Utilities - Price: Free with in-app purchases - Rating: 4.54/5 from 13 App Store ratings · 26 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 1 MB - Languages: English - Released: 2009-12-04 - Data updated: 2026-06-21 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/audiofile-calc-lufs-db-hz/id337547274/reviews.md ## What is Audiofile Calc? 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. ## Key features - Length calculations - Pitch calculations - Timecode conversions - Electric and acoustics tools - LUFS targeting - Batch conversion - PDF export ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Audiofile Calc Pro | $4.99 | one-time | ## Recent user reviews (10 of 26) All indexed reviews: https://appshunter.io/ios/app/audiofile-calc-lufs-db-hz/id337547274/reviews.md ### 5/5 — Great app *2022-03-31* 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... **Developer response:** Varispeed is coming in Calc 4.3 — built from this exact request. Thanks for the idea. ### 5/5 — Really useful app *2021-11-15* 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 **Developer response:** Thank you so much for taking the time to share your thoughts! Cheers! ### 5/5 — Incredibly useful! Now compatible with the current iOS. Get it! *2021-01-26* This app is fantastic. Absolutely indispensable. Thank you so much for a wonderful app!! **Developer response:** should be good now, enjoy! ### 2/5 — File Size calculation is wrong *2019-01-13* Calculations with 32-bit depth are wrong. **Developer response:** Thanks Ev! This is resolved in 3.7.1. Cheers. ### 3/5 — Great app *2018-10-17* I’ve had it in the past on previous devices. It comes in handy more than I thought. But the numeric input is not functional in this version on my iPhone X. ### 5/5 — Super helpful little App *2017-08-24, version 3.0.2* Please update for ios11 though, am happy to pay for it. ### 4/5 — Where's the 64-Bit Version? *2017-06-06* 32-bit apps will no longer work with the upcoming IOS 11. Are we dead in the water? **Developer response:** should be good now, enjoy! ### 5/5 — Not working with iOS10 *2016-09-26* Not currently working with the new operating system. I use this app all the time and would love to see a compatible update. Thanks! **Developer response:** Thanks for your note! Should be good now. Cheers. ### 4/5 — An excellent workflow tool *2016-04-01* While there are many apps and programs available to do this kind of calculations, there are none that I am aware of which combine so many great studio workflow enhancement tools together in on handy package. I suspect this will become an invaluable bit of kit in the studio and live. A brilliant bit of design by an excellent team. Cheers! **Developer response:** Thanks - cheers to you! ### 5/5 — Not working with iOS 9.0!!! *2015-10-22* Love the app, but not working with iOS 9.0! Update***** With iOS 9.1 installed, the app is running again like normal again! Amazing free application for audio engineers😊 **Developer response:** Thanks, enjoy! ## Frequently asked questions about Audiofile Calc ### What is Audiofile Calc? Audiofile Calc is a suite of audio engineering calculators designed for musicians and producers. It offers a wide range of free tools for common calculations and an optional Pro tier for advanced features. ### What kind of free calculators are available in Audiofile Calc? The free version of Audiofile Calc includes calculators for note length, bar length, song length, beats to tempo, time to samples, samples to time, comparing tempos, changing tempos, summing times, subtracting times, note name to frequency, MIDI note to frequency, frequency to note name, wavelength to frequency, frames to timecode, converting timecode, changing timecode, comparing power, comparing voltage, distance to time, time to distance, sound pressure level (SPL), panning, and file size. ### What features are included in the Calc Pro tier of Audiofile Calc? Calc Pro, available for a $9.99 one-time purchase, includes advanced calculators for LUFS target, Nyquist frequency, equal loudness, cable attenuation/impedance, batch conversion, and PDF sharing of calculations. ### How much does Audiofile Calc cost? Audiofile Calc is free to download and use with its basic calculators. The advanced Calc Pro features can be unlocked with a one-time purchase of $9.99. ### Is Audiofile Calc available on other devices? Based on the provided data, Audiofile Calc is available on iPhone, iPad, and iPod touch. ### How often is Audiofile Calc updated? The latest version of Audiofile Calc is 4.1, and it was last updated on March 19, 2026. This indicates a recent update. ### What is the user sentiment for Audiofile Calc? Audiofile Calc has a strong rating of 4.5 stars from 12 ratings, suggesting that users generally have a positive experience with the app. ### What is the age rating for Audiofile Calc? Audiofile Calc has an age rating of 4+, making it suitable for a wide range of users. ## Version history (last 5 releases) ### 4.3 — 2026-06-11 Two new calculators — one for everyone, one for Calc Pro. New in this release: – dB Converter (free) — turn any decibel value into its voltage (amplitude) and power ratios. The perfect companion to Compare Power and Compare Voltage, which go the other direction – Varispeed (Calc Pro) — the pitch shift BPM calculator you asked for. Enter a source and target tempo and get the pitch shift in semitones, sampler-ready semitones + cents, and the speed change percentage for tape-style and sampler speed changes Calc Pro keeps growing — one purchase, every new pro calculator included. ### 4.2 — 2026-04-23 Completely reimagined for modern iOS. Rebuilt from the ground up with a redesigned interface, ergonomic bottom toolbar, and full support for current iPhone and iPad displays. New in this release: – Calc Pro: EBU R128/LUFS, sampling theory, equal-loudness contours, cable attenuation, batch conversion, and PDF share – Delay calculator with time and samples – Keyboard input for running on macOS – Bottom toolbar — all actions within thumb reach on any screen size – Full calculator name displayed in navigation – Refreshed visual design throughout — with a precision adjustment of the custom numpad ### 4.1 — 2026-03-19 Completely reimagined for modern iOS. Rebuilt from the ground up with a redesigned interface, ergonomic bottom toolbar, and full support for current iPhone and iPad displays. New in this release: – Calc Pro: EBU R128/LUFS, sampling theory, equal-loudness contours, cable attenuation, batch conversion, and PDF share – Bottom toolbar — all actions within thumb reach on any screen size – Full calculator name displayed in navigation – Refreshed visual design throughout — with a precision adjustment of the custom numpad ### 4.0 — 2026-03-18 Completely reimagined for modern iOS. Rebuilt from the ground up with a redesigned interface, ergonomic bottom toolbar, and full support for current iPhone and iPad displays. New in this release: – Calc Pro: EBU R128/LUFS, sampling theory, equal-loudness contours, cable attenuation, batch conversion, and PDF share – Bottom toolbar — all actions within thumb reach on any screen size – Full calculator name displayed in navigation – Refreshed visual design throughout ### 3.7.1 — 2021-01-26 Improve File Size calculation 32-bit option, and add 64-bit option ## Apps similar to Audiofile Calc | App | Rating | Price | Category | | --- | --- | --- | --- | | [Darkglass Suite](https://appshunter.io/ios/app/darkglass-suite/id1473432338) | 4.0 (23) | Free | Music | | [SSL Live TaCo](https://appshunter.io/ios/app/ssl-live-taco/id1124831393) | 3.0 (6) | Free | Music | | [mRecall](https://appshunter.io/ios/app/mrecall/id1562146561) | 5.0 (3) | Free | Music | | [MusicMath](https://appshunter.io/ios/app/musicmath/id381525762) | 4.2 (11) | $9.99 | Music | ## More apps by Audiofile Engineering, LLC - [Fidelia Remote](https://appshunter.io/ios/app/fidelia-remote/id408043917) - [Audiofile DDP Player](https://appshunter.io/ios/app/audiofile-ddp-player/id6759634010) All apps by Audiofile Engineering, LLC: https://appshunter.io/developer/309378687 ## Related topics [car audio calculador plus](https://appshunter.io/ios/topics/car-audio-calculador-plus) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-21.*