# Delay Calc vs Decibel Display

The clearest difference is review sentiment: Delay Calc at 80% against Decibel Display's 40%. Delay Calc also leads on rating (4.5 vs 4.3) and iOS requirement (10.0 vs 13.0). Decibel Display's advantage is update cadence (every 5 weeks vs every 36 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Delay Calc holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 6 and 11 respectively. Written reviews point the same way: 80% of Delay Calc's written reviews are positive against 40% of Decibel Display's.

Delay Calc ships an update every 36 months, Decibel Display every 5 weeks. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Delay Calc | Decibel Display |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (6 ratings)](https://appshunter.io/ios/app/delay-calc/id562621643/reviews)** | [4.3 (11 ratings)](https://appshunter.io/ios/app/decibel-display/id1480358065/reviews) |
| Number of ratings | 6 | **11** |
| Positive reviews | **80.0% of reviews** | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 1 MB | 12 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Kevlee Software LLC](https://appshunter.io/developer/562619440) | [Process Audio](https://appshunter.io/developer/1480358064) |

## What reviewers say

### Delay Calc

[App page](https://appshunter.io/ios/app/delay-calc/id562621643)

This app helps musicians and recording engineers calculate delay and modulation times based on BPM. Input your BPM and select rhythmic values to instantly get precise timings in milliseconds or hertz for your audio effects.

**Highlights:** BPM to millisecond conversion, BPM to hertz conversion, Rhythmic value selection, Delay time calculation, Modulation time calculation

**Features:** macOS Compatibility

**In-app purchases:** none


### Decibel Display

[App page](https://appshunter.io/ios/app/decibel-display/id1480358065)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Delay Calc free?

Delay Calc is free to download, with no in-app purchases.

### Is Decibel Display free?

Decibel Display is free to download, with no in-app purchases.

### Which has better reviews, Delay Calc or Decibel Display?

Delay Calc is rated higher. Delay Calc averages 4.5 out of 5 from 6 ratings, while Decibel Display averages 4.3 from 11 ratings.

### Do Delay Calc or Decibel Display have ads?

Neither Delay Calc nor Decibel Display shows ads.

### Which is updated more often, Delay Calc or Decibel Display?

Delay Calc ships an update every 36 months, and Decibel Display every 5 weeks. Most recently, Delay Calc was updated on October 20, 2026 and Decibel Display on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*