---
title: "5ths Machine - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Think you know your key signatures cold?  Answer this: which key has 41 sharps?   The equal temperament system is a circle with 12 positions, just like a clock. And, just like on a clock, the hands ke"
---

# 5ths Machine — United States
> The circle never stops...

![5ths Machine App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/3f/6c/8f/3f6c8fec-b5b1-9e86-3a64-af58e11fc403/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/434x0w.png)

**Developer:** [Lucy Hudson](https://apptail.io/developer/lucy-hudson-HZFb)
**Category:** Music
**Rating:** 5.0/5 (1 ratings)
**Price:** Free
**Bundle ID:** org.cloudwatch.5thsMachine
**Store:** Apple App Store
**Country:** United States
**Version:** 2.0.1 (released 2026-01-02)
**Original Release:** 2022-01-27
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1582877284)
**AppTail Page:** [https://apptail.io/app/5ths-machine-LTVk/united-states](https://apptail.io/app/5ths-machine-LTVk/united-states)

## 5ths Machine Description
Think you know your key signatures cold?  Answer this: which key has 41 sharps? 

The equal temperament system is a circle with 12 positions, just like a clock. And, just like on a clock, the hands keep going around and around forever. The key signature of 41 sharps is theoretically consistent with the Western diatonic system ― learn why, and learn how to find out what key it is. The Background Information and the Quiz Tips explain the system in detail, and Chronology puts it all in perspective.

Enjoy the “Perpetual 5ths Machine Boogie” while key signatures you’ve never seen before pass by on parade. Then, buckle down and solve the Quiz questions. NOW you understand music theory the 5ths Machine way!

## 5ths Machine Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/28/36/5f/28365fda-cabe-8cda-f85f-6d717a3ad1f3/697c891f-443c-4653-8e56-50c4e1cc3972_1sharps.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/1f/46/c2/1f46c266-94a8-37a1-5767-28a41c727ff9/2tackle.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/4c/91/62/4c91623d-ac32-4540-745f-8fe71a7a2819/3getit.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/aa/b1/02/aab10282-929c-b509-f24b-5de545f024d4/521bb331-99f6-4362-ac9e-6df8308e4d77_4background.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/52/06/48/5206487a-36f8-62b8-a259-39b9a88e7baa/1fa38fdc-6426-4368-ad4a-5c96fce430e9_5chron.png/1284x2778.png)

## 5ths Machine Rating Breakdown in United States
- 5 stars: 1 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)






## 5ths Machine Available In
- [United States](https://apptail.io/app/5ths-machine-LTVk/united-states)
- [Angola](https://apptail.io/app/5ths-machine-LTVk/angola)
- [Argentina](https://apptail.io/app/5ths-machine-LTVk/argentina)
- [Austria](https://apptail.io/app/5ths-machine-LTVk/austria)
- [Australia](https://apptail.io/app/5ths-machine-LTVk/australia)
- [Azerbaijan](https://apptail.io/app/5ths-machine-LTVk/azerbaijan)
- [Belgium](https://apptail.io/app/5ths-machine-LTVk/belgium)
- [Bahrain](https://apptail.io/app/5ths-machine-LTVk/bahrain)
- [Bermuda](https://apptail.io/app/5ths-machine-LTVk/bermuda)
- [Brunei](https://apptail.io/app/5ths-machine-LTVk/brunei)
- [Brazil](https://apptail.io/app/5ths-machine-LTVk/brazil)
- [Belarus](https://apptail.io/app/5ths-machine-LTVk/belarus)
- [Canada](https://apptail.io/app/5ths-machine-LTVk/canada)
- [Switzerland](https://apptail.io/app/5ths-machine-LTVk/switzerland)
- [Chile](https://apptail.io/app/5ths-machine-LTVk/chile)
- [China](https://apptail.io/app/5ths-machine-LTVk/china)
- [Colombia](https://apptail.io/app/5ths-machine-LTVk/colombia)
- [Czechia](https://apptail.io/app/5ths-machine-LTVk/czechia)
- [Germany](https://apptail.io/app/5ths-machine-LTVk/germany)
- [Denmark](https://apptail.io/app/5ths-machine-LTVk/denmark)
- [Algeria](https://apptail.io/app/5ths-machine-LTVk/algeria)
- [Ecuador](https://apptail.io/app/5ths-machine-LTVk/ecuador)
- [Estonia](https://apptail.io/app/5ths-machine-LTVk/estonia)
- [Egypt](https://apptail.io/app/5ths-machine-LTVk/egypt)
- [Spain](https://apptail.io/app/5ths-machine-LTVk/spain)
- [Finland](https://apptail.io/app/5ths-machine-LTVk/finland)
- [France](https://apptail.io/app/5ths-machine-LTVk/france)
- [United Kingdom](https://apptail.io/app/5ths-machine-LTVk/united-kingdom)
- [Greece](https://apptail.io/app/5ths-machine-LTVk/greece)
- [Hong Kong SAR China](https://apptail.io/app/5ths-machine-LTVk/hong-kong)
- [Hungary](https://apptail.io/app/5ths-machine-LTVk/hungary)
- [Indonesia](https://apptail.io/app/5ths-machine-LTVk/indonesia)
- [Ireland](https://apptail.io/app/5ths-machine-LTVk/ireland)
- [Israel](https://apptail.io/app/5ths-machine-LTVk/israel)
- [India](https://apptail.io/app/5ths-machine-LTVk/india)
- [Italy](https://apptail.io/app/5ths-machine-LTVk/italy)
- [Japan](https://apptail.io/app/5ths-machine-LTVk/japan)
- [South Korea](https://apptail.io/app/5ths-machine-LTVk/south-korea)
- [Kuwait](https://apptail.io/app/5ths-machine-LTVk/kuwait)
- [Kazakhstan](https://apptail.io/app/5ths-machine-LTVk/kazakhstan)
- [Lebanon](https://apptail.io/app/5ths-machine-LTVk/lebanon)
- [Madagascar](https://apptail.io/app/5ths-machine-LTVk/madagascar)
- [Mexico](https://apptail.io/app/5ths-machine-LTVk/mexico)
- [Malaysia](https://apptail.io/app/5ths-machine-LTVk/malaysia)
- [Nigeria](https://apptail.io/app/5ths-machine-LTVk/nigeria)
- [Netherlands](https://apptail.io/app/5ths-machine-LTVk/netherlands)
- [Norway](https://apptail.io/app/5ths-machine-LTVk/norway)
- [New Zealand](https://apptail.io/app/5ths-machine-LTVk/new-zealand)
- [Peru](https://apptail.io/app/5ths-machine-LTVk/peru)
- [Philippines](https://apptail.io/app/5ths-machine-LTVk/philippines)
- [Pakistan](https://apptail.io/app/5ths-machine-LTVk/pakistan)
- [Poland](https://apptail.io/app/5ths-machine-LTVk/poland)
- [Portugal](https://apptail.io/app/5ths-machine-LTVk/portugal)
- [Romania](https://apptail.io/app/5ths-machine-LTVk/romania)
- [Russia](https://apptail.io/app/5ths-machine-LTVk/russia)
- [Saudi Arabia](https://apptail.io/app/5ths-machine-LTVk/saudi-arabia)
- [Sweden](https://apptail.io/app/5ths-machine-LTVk/sweden)
- [Singapore](https://apptail.io/app/5ths-machine-LTVk/singapore)
- [Slovenia](https://apptail.io/app/5ths-machine-LTVk/slovenia)
- [Thailand](https://apptail.io/app/5ths-machine-LTVk/thailand)
- [Türkiye](https://apptail.io/app/5ths-machine-LTVk/turkey)
- [Taiwan](https://apptail.io/app/5ths-machine-LTVk/taiwan)
- [Ukraine](https://apptail.io/app/5ths-machine-LTVk/ukraine)
- [Uzbekistan](https://apptail.io/app/5ths-machine-LTVk/uzbekistan)
- [Vietnam](https://apptail.io/app/5ths-machine-LTVk/vietnam)
- [United Arab Emirates](https://apptail.io/app/5ths-machine-LTVk/united-arab-emirates)
- [South Africa](https://apptail.io/app/5ths-machine-LTVk/south-africa)

---

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