MusicMath vs Decibel Display
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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"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
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.
- Real-time audio metering
- Customizable meter presets
- VU Meter, LUFS, RMS
- Spectrum Analyzer
- Phase-scope
- Modular design
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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
Verdict
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
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.
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.
MusicMath ships an update every 7 months, Decibel Display every 5 weeks. Both last shipped on October 19, 2026.
| Parameter | MusicMath | Decibel Display |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.3 (12 ratings) | 4.3 (11 ratings) |
| Positive reviews | 73.3% of reviews — better | 40.0% of reviews |
| Number of ratings | 12 — better | 11 |
| Update frequency | Every 7 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 12 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Laurent Colson | Process Audio |
Customer experience
MusicMath
Decibel Display
In-app purchases
MusicMath
No in-app purchases
Decibel Display
No in-app purchases
Questions
Is MusicMath free?
Is Decibel Display free?
Which has better reviews, MusicMath or Decibel Display?
Do MusicMath or Decibel Display have ads?
Which is updated more often, MusicMath or Decibel Display?
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