# BlueKeyDetect vs DJ Calculator

The clearest difference is update cadence: DJ Calculator at every 4 weeks against BlueKeyDetect's every 8 months. BlueKeyDetect's advantage is price ($0.99 vs $2.99) and iOS requirement (10.0 vs 17.6). On rating, ratings volume, ads and in-app purchases there is nothing between them.

BlueKeyDetect costs $0.99 and DJ Calculator $2.99 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 — 5.0 for BlueKeyDetect against 5.0 for DJ Calculator. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

BlueKeyDetect ships an update every 8 months, DJ Calculator every 4 weeks. The most recent releases landed on October 13, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | BlueKeyDetect | DJ Calculator |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/bluekeydetect/id1493584771/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/dj-calculator/id6756451441/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 weeks** |
| Monetization | Paid | Paid |
| Size | 15 MB | 3 MB |
| Requires iOS | **10.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Arnhold](https://appshunter.io/developer/432185706) | [Orbit Space Studio LLC](https://appshunter.io/developer/1799808126) |

## What reviewers say

### BlueKeyDetect

[App page](https://appshunter.io/ios/app/bluekeydetect/id1493584771)

Instantly identify the musical key and tempo of songs by recording short audio clips. Ideal for musicians in jam sessions needing quick key information.

**Highlights:** Record audio clips, Detect musical key, Display beats per minute (BPM), Supports guitar and bass jam sessions, Multiple recording options for accuracy

**In-app purchases:** none


### DJ Calculator

[App page](https://appshunter.io/ios/app/dj-calculator/id6756451441)

This app provides DJs with essential tools for seamless transitions and well-crafted sets. It offers instant tempo and key insights, including BPM conversions and a mixing reference wheel, to help DJs mix in key and build energy.

**Highlights:** BPM Tap for tempo conversions, Mixing Reference with Camelot Wheel, Genre BPM Guide, Offline functionality, Clean interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BlueKeyDetect free?

BlueKeyDetect costs $0.99, with no in-app purchases.

### Is DJ Calculator free?

DJ Calculator costs $2.99, with no in-app purchases.

### Which has better reviews, BlueKeyDetect or DJ Calculator?

BlueKeyDetect and DJ Calculator are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do BlueKeyDetect or DJ Calculator have ads?

Neither BlueKeyDetect nor DJ Calculator shows ads.

### Which is updated more often, BlueKeyDetect or DJ Calculator?

BlueKeyDetect ships an update every 8 months, and DJ Calculator every 4 weeks. Most recently, BlueKeyDetect was updated on October 13, 2026 and DJ Calculator on October 18, 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.*