Comparison

MusicMath vs Decibel Display

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

MusicMath

This musical tool offers a comprehensive suite of calculators for audio professionals and musicians. It includes converters for timecode, tempo, note frequencies, and sample lengths, alongside a tap tempo metronome and detailed note-to-frequency tables with customizable temperaments.

Highlights
  • Timecode calculator with frame format management
  • Tap tempo with metronome
  • Tempo to delay (milliseconds/hertz) converter
  • Note to frequency converter with temperaments
  • Sample length converter
  • Frequency to note converter
Features
Read full description

"MusicMath" is a musical tool that includes a timecode calculator, a tap tempo, a tempo to delay in milliseconds and hertz converter, a note to frequency table converter, a sample length converter, a tempo change converter, and a frequency to note converter. Timecode calculator: • Add and subtract timecodes or frames • Convert a number of frames to timecodes • Simultaneously convert the number of frames and the timecode • Conversion of timecode when changing the frame format • Managing frame formats 23.976 fps, 24 fps, 25 fps, 29.94 fps, 29.97 fps, 29.97 fps drop frame, 30 fps, 50 fps, 59.94 fps, 60 fps • Real-time display for formats 23.976 fps, 29.94 fps, 29.97 fps, 59.94 fps • Unlimited history calculations • History can be saved and exported to other applications Tap tempo: • Improved algorithm for impresize tap • Metronome • Transfer calculated tempo to other MusicMath tools Tempo to delay table: • Convert tempo to milliseconds and hertz • Convert for whole-note, half-note, quarter-note, eighth-note, sixteenth-note, thirty-note, and sixty-fourth-note for dotted notes and triplets Note to frequency table: • Convert MIDI notes to frequencies • Adjustable diapason and root note • One hundred selectable temperaments • Visualization of intervals in cents for each temperament • Taking into account the temperament for the calculation of frequencies • Plays piano sound when notes are touched Sample length converter: • Convert length between samples, milliseconds, and tempo Tempo change converter: • Calculates tempo change by ratio (%) and transposition Frequency to note converter: • Convert a frequency to the closest note and the cents needed • Plays the frequency

About

Decibel Display

This companion app displays audio metering data from its desktop counterpart on your smartphone or tablet. Design custom multi-meter presets with various meter types, colors, and shapes for real-time audio analysis.

Highlights
  • Real-time audio metering
  • Customizable meter presets
  • VU Meter, LUFS, RMS
  • Spectrum Analyzer
  • Phase-scope
  • Modular design
Features
Read full description

Decibel Display app is only a viewer, it works with Decibel Desktop which is an audio Plug-in (VST3, AAX, AU) and standalone app (Mac, Windows) that can be broadcast to any smartphone or tablet device using this app. It is a modular multi-meter on which you can design the preset you want including color, size, shape, choosing between several VU Meter, LUFS Meters, RMS Meter, Spectrum Analyser, Phase-scope and so on.

Screenshots

MusicMath4 screens
Decibel Display2 screens

Verdict

The call

The clearest difference is price: Decibel Display at Free against MusicMath's $9.99. Decibel Display also leads on update cadence (every 5 weeks vs every 7 months). MusicMath's advantage is review sentiment (73% vs 40%). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Decibel Display is free to download; MusicMath costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.3 for MusicMath against 4.3 for Decibel Display. Both are backed by a comparable volume of ratings — 12 and 11 respectively. Written reviews are what separate them: 73% of MusicMath's written reviews are positive against 40% of Decibel Display's.

UpkeepUpdate frequency

MusicMath ships an update every 7 months, Decibel Display every 5 weeks. Both last shipped on October 19, 2026.

Scorecard4 real differences · 6 level
MusicMath versus Decibel Display: the parameters behind the verdict, then further details
ParameterMusicMathDecibel Display
Price$9.99Free — better
Rating4.3 (12 ratings)4.3 (11 ratings)
Positive reviews73.3% of reviews — better40.0% of reviews
Number of ratings12 — better11
Update frequencyEvery 7 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size12 MB12 MB
Age rating4+4+
DeveloperLaurent ColsonProcess Audio

Customer experience

MusicMath

All ratings12 ratings
Positive75.0%
Neutral16.7%
Negative8.3%
Written reviews30 reviews
Positive73.3%
Neutral10.0%
Negative16.7%

Decibel Display

All ratings11 ratings
Positive81.8%
Neutral0.0%
Negative18.2%
Written reviews5 reviews
Positive40.0%
Neutral0.0%
Negative60.0%

In-app purchases

None

MusicMath

No in-app purchases

None

Decibel Display

No in-app purchases

Questions

Is MusicMath free?
MusicMath costs $9.99, with no in-app purchases.
Is Decibel Display free?
Decibel Display is free to download, with no in-app purchases.
Which has better reviews, MusicMath or Decibel Display?
MusicMath and Decibel Display are both rated 4.3 out of 5 on the App Store, from 12 and 11 ratings respectively.
Do MusicMath or Decibel Display have ads?
Neither MusicMath nor Decibel Display shows ads.
Which is updated more often, MusicMath or Decibel Display?
MusicMath ships an update every 7 months, and Decibel Display every 5 weeks. Most recently, MusicMath was updated on October 19, 2026 and Decibel Display on October 19, 2026.

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