5ths Machine
The circle never stops...
About
Explore the theoretical intricacies of key signatures with an interactive quiz. Learn about the 12-position equal temperament system and discover how to identify keys with an unusual number of sharps. Understand music theory through a unique perspective.
What's New in 5ths Machine
2.0.1
January 2, 2026
answered new age rating questions
Developer apps
FAQ
What is the price of 5ths Machine?
5ths Machine is a paid application, available for $1.99. This one-time purchase grants you full access to all its features without any additional costs or subscriptions.
Does 5ths Machine have ads?
No, 5ths Machine is completely ad-free. You can enjoy the music theory content and interactive quiz without any interruptions from advertisements.
What devices is 5ths Machine compatible with?
5ths Machine is designed for iOS devices, including iPhone, iPad, and iPod. It leverages the touch interface for an engaging learning experience.
How often is 5ths Machine updated?
The latest version of 5ths Machine is 2.0.1, last updated on January 2, 2026. While specific update frequency isn't detailed, the app has seen updates since its release on January 27, 2022.
What is the age rating for 5ths Machine?
5ths Machine has an age rating of 4+. This indicates that the content is generally suitable for all ages, with no mature themes present.
What makes 5ths Machine unique compared to other music theory apps?
5ths Machine focuses specifically on the theoretical exploration of key signatures and the equal temperament system, offering a unique quiz format to test understanding. It delves into concepts like keys with 41 sharps, which is not commonly found in other music theory applications.
Can I use 5ths Machine offline?
The provided information does not specify offline functionality. However, as it is a quiz and educational tool, it is likely designed to function without a constant internet connection after initial download.
